[patch 00/11] zfcp updates for 2.6.27

[patch 00/11] zfcp updates for 2.6.27

[christof.schmitt]

James,

here are the final large zfcp updates for 2.6.27.

The first patches are small fixes for problems that were found with
the last updates. One patch moves the helper functions for the
scsi_cmnd status to the common scsi include file. The last patches are
the large code cleanups.

The patches apply to current scsi-misc.

Christof

[patch 01/11] zfcp: wait until adapter is finished with ERP during auto-port

[christof.schmitt]

[-- Attachment #1: zfcp_auto_port_erp_race.diff --]
[-- Type: text/plain, Size: 826 bytes --]

From: Swen Schillig <swen@vnet.ibm.com>

In some situations the auto port attachment task is started
before the ERP is finished. To prevent this unwanted situation
we wait until the adapter is up and running before we start our work.

Signed-off-by: Swen Schillig <swen@vnet.ibm.com>
Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com>
---
 drivers/s390/scsi/zfcp_fc.c |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/s390/scsi/zfcp_fc.c	2008-06-27 18:07:02.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_fc.c	2008-06-27 18:07:26.000000000 +0200
@@ -520,6 +520,7 @@ int zfcp_scan_ports(struct zfcp_adapter 
 	int ret, i;
 	struct zfcp_gpn_ft *gpn_ft;
 
+	zfcp_erp_wait(adapter); /* wait until adapter is finished with ERP */
 	if (fc_host_port_type(adapter->scsi_host) != FC_PORTTYPE_NPORT)
 		return 0;
 

-- 

[patch 02/11] zfcp: Fix error checking for ELS ADISC requests

[christof.schmitt]

[-- Attachment #1: fix-els-adisc.diff --]
[-- Type: text/plain, Size: 796 bytes --]

From: Christof Schmitt <christof.schmitt@de.ibm.com>

Correctly check the status for ELS ADISC requests. 0 means success.

Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com>
Signed-off-by: Swen Schillig <swen@vnet.ibm.com>
---
 drivers/s390/scsi/zfcp_fc.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/s390/scsi/zfcp_fc.c	2008-06-27 18:07:26.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_fc.c	2008-06-27 18:07:43.000000000 +0200
@@ -263,7 +263,7 @@ static void zfcp_fc_adisc_handler(unsign
 	struct zfcp_port *port = adisc->els.port;
 	struct zfcp_ls_adisc_acc *ls_adisc = &adisc->ls_adisc_acc;
 
-	if (!adisc->els.status) {
+	if (adisc->els.status) {
 		/* request rejected or timed out */
 		zfcp_erp_port_forced_reopen(port, 0, 63, NULL);
 		goto out;

-- 

[patch 03/11] zfcp: Adapter reopen for large number of unsolicited status

[christof.schmitt]

[-- Attachment #1: zfcp_aux_cleanup_avoid_mini_race.diff --]
[-- Type: text/plain, Size: 2216 bytes --]

From: Swen Schillig <swen@vnet.ibm.com>

When zfcp receives 16 unsolicited status messages, this could trigger
an adapter reopen. In this case, first try to send a new status read,
and only if this fails, go through the recovery.

Signed-off-by: Swen Schillig <swen@vnet.ibm.com>
Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com>
---
 drivers/s390/scsi/zfcp_aux.c |   15 +++++++--------
 drivers/s390/scsi/zfcp_def.h |    3 +--
 2 files changed, 8 insertions(+), 10 deletions(-)

--- a/drivers/s390/scsi/zfcp_aux.c	2008-06-27 18:06:59.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_aux.c	2008-06-27 18:07:57.000000000 +0200
@@ -550,15 +550,14 @@ static void zfcp_dummy_release(struct de
 int zfcp_status_read_refill(struct zfcp_adapter *adapter)
 {
 	while (atomic_read(&adapter->stat_miss) > 0)
-		if (zfcp_fsf_status_read(adapter, ZFCP_WAIT_FOR_SBAL))
+		if (zfcp_fsf_status_read(adapter, ZFCP_WAIT_FOR_SBAL)) {
+			if (atomic_read(&adapter->stat_miss) >= 16) {
+				zfcp_erp_adapter_reopen(adapter, 0, 103, NULL);
+				return 1;
+			}
 			break;
-	else
-		atomic_dec(&adapter->stat_miss);
-
-	if (ZFCP_STATUS_READS_RECOM <= atomic_read(&adapter->stat_miss)) {
-		zfcp_erp_adapter_reopen(adapter, 0, 103, NULL);
-		return 1;
-	}
+		} else
+			atomic_dec(&adapter->stat_miss);
 	return 0;
 }
 
--- a/drivers/s390/scsi/zfcp_def.h	2008-06-27 18:06:59.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_def.h	2008-06-27 18:07:57.000000000 +0200
@@ -108,7 +108,6 @@ zfcp_address_to_sg(void *address, struct
 #define ZFCP_QTCB_VERSION	FSF_QTCB_CURRENT_VERSION
 /* ATTENTION: value must not be used by hardware */
 #define FSF_QTCB_UNSOLICITED_STATUS		0x6305
-#define ZFCP_STATUS_READS_RECOM		        FSF_STATUS_READS_RECOM
 
 /* Do 1st retry in 1 second, then double the timeout for each following retry */
 #define ZFCP_EXCHANGE_CONFIG_DATA_FIRST_SLEEP	1
@@ -743,7 +742,7 @@ struct zfcp_data {
 #define ZFCP_POOL_FSF_REQ_ERP_NR	1
 #define ZFCP_POOL_FSF_REQ_SCSI_NR	1
 #define ZFCP_POOL_FSF_REQ_ABORT_NR	1
-#define ZFCP_POOL_STATUS_READ_NR	ZFCP_STATUS_READS_RECOM
+#define ZFCP_POOL_STATUS_READ_NR	FSF_STATUS_READS_RECOM
 #define ZFCP_POOL_DATA_GID_PN_NR	1
 
 /* struct used by memory pools for fsf_requests */

-- 

[patch 04/11] zfcp: Small QDIO cleanups

[christof.schmitt]

[-- Attachment #1: qdio-small-cleanup.diff --]
[-- Type: text/plain, Size: 3331 bytes --]

From: Christof Schmitt <christof.schmitt@de.ibm.com>

QBUFF_PER_PAGE is only used inside the qdio module, so move it to
zfcp_qdio.c

zfcp_qdio_zero_sbals is now only used in the qdio module, so make it
static.

Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com>
Signed-off-by: Swen Schillig <swen@vnet.ibm.com>
---
 drivers/s390/scsi/zfcp_def.h  |    2 --
 drivers/s390/scsi/zfcp_ext.h  |    1 -
 drivers/s390/scsi/zfcp_qdio.c |   31 +++++++++++++------------------
 3 files changed, 13 insertions(+), 21 deletions(-)

--- a/drivers/s390/scsi/zfcp_ext.h	2008-06-27 18:06:59.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_ext.h	2008-06-27 18:08:22.000000000 +0200
@@ -43,7 +43,6 @@ extern void _zfcp_scan_ports_later(struc
 /******************************* S/390 IO ************************************/
 extern int  zfcp_ccw_register(void);
 
-extern void zfcp_qdio_zero_sbals(struct qdio_buffer **, int, int);
 extern int  zfcp_qdio_allocate(struct zfcp_adapter *);
 extern void zfcp_qdio_free(struct zfcp_adapter *);
 extern int  zfcp_qdio_send(struct zfcp_fsf_req *fsf_req);
--- a/drivers/s390/scsi/zfcp_qdio.c	2008-06-27 18:06:59.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_qdio.c	2008-06-27 18:08:22.000000000 +0200
@@ -11,6 +11,7 @@
 /* FIXME(tune): free space should be one max. SBAL chain plus what? */
 #define ZFCP_QDIO_PCI_INTERVAL	(QDIO_MAX_BUFFERS_PER_Q \
 				- (ZFCP_MAX_SBALS_PER_REQ + 4))
+#define QBUFF_PER_PAGE		(PAGE_SIZE / sizeof(struct qdio_buffer))
 
 static int zfcp_qdio_buffers_enqueue(struct qdio_buffer **sbal)
 {
@@ -63,6 +64,16 @@ static void zfcp_qdio_handler_error(stru
 				ZFCP_STATUS_COMMON_ERP_FAILED, id, NULL);
 }
 
+static void zfcp_qdio_zero_sbals(struct qdio_buffer *sbal[], int first, int cnt)
+{
+	int i, sbal_idx;
+
+	for (i = first; i < first + cnt; i++) {
+		sbal_idx = i % QDIO_MAX_BUFFERS_PER_Q;
+		memset(sbal[sbal_idx], 0, sizeof(struct qdio_buffer));
+	}
+}
+
 static void zfcp_qdio_int_req(struct ccw_device *cdev, unsigned int status,
 			      unsigned int qdio_err, unsigned int siga_err,
 			      unsigned int queue_no, int first, int count,
@@ -366,22 +377,6 @@ int zfcp_qdio_send(struct zfcp_fsf_req *
 }
 
 /**
- * zfcp_qdio_zero_sbals - zero all sbals of the specified area and queue
- * @buf: pointer to array of SBALS
- * @first: integer specifying the SBAL number to start
- * @count: integer specifying the number of SBALS to process
- */
-void zfcp_qdio_zero_sbals(struct qdio_buffer *sbal[], int first, int count)
-{
-	int i, sbal_idx;
-
-	for (i = first; i < first + count; i++) {
-		sbal_idx = i % QDIO_MAX_BUFFERS_PER_Q;
-		memset(sbal[sbal_idx], 0, sizeof(struct qdio_buffer));
-	}
-}
-
-/**
  * zfcp_qdio_allocate - allocate queue memory and initialize QDIO data
  * @adapter: pointer to struct zfcp_adapter
  * Returns: -ENOMEM on memory allocation error or return value from
--- a/drivers/s390/scsi/zfcp_def.h	2008-06-27 18:07:57.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_def.h	2008-06-27 18:08:22.000000000 +0200
@@ -100,8 +100,6 @@ zfcp_address_to_sg(void *address, struct
 
 #define ZFCP_TYPE2_RECOVERY_TIME        8	/* seconds */
 
-#define QBUFF_PER_PAGE			(PAGE_SIZE / sizeof(struct qdio_buffer))
-
 /********************* FSF SPECIFIC DEFINES *********************************/
 
 #define ZFCP_ULP_INFO_VERSION                   26

-- 

[patch 05/11] zfcp: Move status accessors from zfcp to SCSI include file.

[christof.schmitt]

[-- Attachment #1: zfcp_scsi_set_byte.diff --]
[-- Type: text/plain, Size: 5333 bytes --]

From: Martin Petermann <martin@linux.vnet.ibm.com>

Move the accessor functions for the scsi_cmnd status from zfcp to the
SCSI include file. Change the interface to the functions to pass the
scsi_cmnd pointer instead of the status pointer.

Signed-off-by: Martin Petermann <martin@linux.vnet.ibm.com>
Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com>
---
 drivers/s390/scsi/zfcp_ext.h  |    2 --
 drivers/s390/scsi/zfcp_fsf.c  |   20 ++++++++++----------
 drivers/s390/scsi/zfcp_scsi.c |   24 +-----------------------
 include/scsi/scsi.h           |   17 +++++++++++++++++
 4 files changed, 28 insertions(+), 35 deletions(-)

--- a/drivers/s390/scsi/zfcp_ext.h	2008-06-30 12:28:38.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_ext.h	2008-06-30 12:28:56.000000000 +0200
@@ -103,8 +103,6 @@ extern int  zfcp_adapter_scsi_register(s
 extern void zfcp_adapter_scsi_unregister(struct zfcp_adapter *);
 extern void zfcp_set_fcp_dl(struct fcp_cmnd_iu *, fcp_dl_t);
 extern char *zfcp_get_fcp_rsp_info_ptr(struct fcp_rsp_iu *);
-extern void set_host_byte(int *, char);
-extern void set_driver_byte(int *, char);
 extern char *zfcp_get_fcp_sns_info_ptr(struct fcp_rsp_iu *);
 extern fcp_dl_t zfcp_get_fcp_dl(struct fcp_cmnd_iu *);
 
--- a/drivers/s390/scsi/zfcp_scsi.c	2008-06-30 12:27:21.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_scsi.c	2008-06-30 12:28:56.000000000 +0200
@@ -107,28 +107,6 @@ zfcp_set_fcp_dl(struct fcp_cmnd_iu *fcp_
 	*zfcp_get_fcp_dl_ptr(fcp_cmd) = fcp_dl;
 }
 
-/*
- * note: it's a bit-or operation not an assignment
- * regarding the specified byte
- */
-static inline void
-set_byte(int *result, char status, char pos)
-{
-	*result |= status << (pos * 8);
-}
-
-void
-set_host_byte(int *result, char status)
-{
-	set_byte(result, status, 2);
-}
-
-void
-set_driver_byte(int *result, char status)
-{
-	set_byte(result, status, 3);
-}
-
 static int
 zfcp_scsi_slave_alloc(struct scsi_device *sdp)
 {
@@ -196,7 +174,7 @@ zfcp_scsi_slave_configure(struct scsi_de
 static void
 zfcp_scsi_command_fail(struct scsi_cmnd *scpnt, int result)
 {
-	set_host_byte(&scpnt->result, result);
+	set_host_byte(scpnt, result);
 	if ((scpnt->device != NULL) && (scpnt->device->host != NULL))
 		zfcp_scsi_dbf_event_result("fail", 4,
 			(struct zfcp_adapter*) scpnt->device->host->hostdata[0],
--- a/include/scsi/scsi.h	2008-06-30 12:27:21.000000000 +0200
+++ b/include/scsi/scsi.h	2008-06-30 12:28:56.000000000 +0200
@@ -9,6 +9,7 @@
 #define _SCSI_SCSI_H
 
 #include <linux/types.h>
+#include <scsi/scsi_cmnd.h>
 
 /*
  * The maximum number of SG segments that we will put inside a
@@ -425,6 +426,22 @@ struct scsi_lun {
 #define driver_byte(result) (((result) >> 24) & 0xff)
 #define suggestion(result)  (driver_byte(result) & SUGGEST_MASK)
 
+static inline void set_msg_byte(struct scsi_cmnd *cmd, char status)
+{
+	cmd->result |= status << 8;
+}
+
+static inline void set_host_byte(struct scsi_cmnd *cmd, char status)
+{
+	cmd->result |= status << 16;
+}
+
+static inline void set_driver_byte(struct scsi_cmnd *cmd, char status)
+{
+	cmd->result |= status << 24;
+}
+
+
 #define sense_class(sense)  (((sense) >> 4) & 0x7)
 #define sense_error(sense)  ((sense) & 0xf)
 #define sense_valid(sense)  ((sense) & 0x80);
--- a/drivers/s390/scsi/zfcp_fsf.c	2008-06-30 12:27:21.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_fsf.c	2008-06-30 12:28:56.000000000 +0200
@@ -3040,18 +3040,18 @@ zfcp_fsf_send_fcp_command_task_handler(s
 		 *        DID_SOFT_ERROR by retrying the request for devices
 		 *        that allow retries.
 		 */
-		set_host_byte(&scpnt->result, DID_SOFT_ERROR);
-		set_driver_byte(&scpnt->result, SUGGEST_RETRY);
+		set_host_byte(scpnt, DID_SOFT_ERROR);
+		set_driver_byte(scpnt, SUGGEST_RETRY);
 		goto skip_fsfstatus;
 	}
 
 	if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
-		set_host_byte(&scpnt->result, DID_ERROR);
+		set_host_byte(scpnt, DID_ERROR);
 		goto skip_fsfstatus;
 	}
 
 	/* set message byte of result in SCSI command */
-	scpnt->result |= COMMAND_COMPLETE << 8;
+	set_msg_byte(scpnt, COMMAND_COMPLETE);
 
 	/*
 	 * copy SCSI status code of FCP_STATUS of FCP_RSP IU to status byte
@@ -3067,23 +3067,23 @@ zfcp_fsf_send_fcp_command_task_handler(s
 		switch (fcp_rsp_info[3]) {
 		case RSP_CODE_GOOD:
 			/* ok, continue */
-			set_host_byte(&scpnt->result, DID_OK);
+			set_host_byte(scpnt, DID_OK);
 			break;
 		case RSP_CODE_LENGTH_MISMATCH:
 			/* hardware bug */
-			set_host_byte(&scpnt->result, DID_ERROR);
+			set_host_byte(scpnt, DID_ERROR);
 			goto skip_fsfstatus;
 		case RSP_CODE_FIELD_INVALID:
 			/* driver or hardware bug */
-			set_host_byte(&scpnt->result, DID_ERROR);
+			set_host_byte(scpnt, DID_ERROR);
 			goto skip_fsfstatus;
 		case RSP_CODE_RO_MISMATCH:
 			/* hardware bug */
-			set_host_byte(&scpnt->result, DID_ERROR);
+			set_host_byte(scpnt, DID_ERROR);
 			goto skip_fsfstatus;
 		default:
 			/* invalid FCP response code */
-			set_host_byte(&scpnt->result, DID_ERROR);
+			set_host_byte(scpnt, DID_ERROR);
 			goto skip_fsfstatus;
 		}
 	}
@@ -3104,7 +3104,7 @@ zfcp_fsf_send_fcp_command_task_handler(s
 		scsi_set_resid(scpnt, fcp_rsp_iu->fcp_resid);
 		if (scsi_bufflen(scpnt) - scsi_get_resid(scpnt) <
 		    scpnt->underflow)
-			set_host_byte(&scpnt->result, DID_ERROR);
+			set_host_byte(scpnt, DID_ERROR);
 	}
 
  skip_fsfstatus:

-- 

[patch 06/11] zfcp: Cleanup of code in zfcp_scsi.c

[christof.schmitt]

[-- Attachment #1: zfcp_scsi_cleanup.diff --]
[-- Type: text/plain, Size: 30224 bytes --]

From: Martin Petermann <martin@linux.vnet.ibm.com>

Cleanup code in zfcp_scsi.c, fix coding style issues and simplify the
code.

Signed-off-by: Martin Petermann <martin@linux.vnet.ibm.com>
Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com>
---
 drivers/s390/scsi/zfcp_dbf.c  |    3 
 drivers/s390/scsi/zfcp_def.h  |    6 
 drivers/s390/scsi/zfcp_ext.h  |    5 
 drivers/s390/scsi/zfcp_fsf.c  |    4 
 drivers/s390/scsi/zfcp_scsi.c |  555 +++++++++++++-----------------------------
 5 files changed, 184 insertions(+), 389 deletions(-)

--- a/drivers/s390/scsi/zfcp_scsi.c	2008-06-30 11:01:46.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_scsi.c	2008-06-30 11:04:29.000000000 +0200
@@ -9,137 +9,32 @@
 #include "zfcp_ext.h"
 #include <asm/atomic.h>
 
-static void zfcp_scsi_slave_destroy(struct scsi_device *sdp);
-static int zfcp_scsi_slave_alloc(struct scsi_device *sdp);
-static int zfcp_scsi_slave_configure(struct scsi_device *sdp);
-static int zfcp_scsi_queuecommand(struct scsi_cmnd *,
-				  void (*done) (struct scsi_cmnd *));
-static int zfcp_scsi_eh_abort_handler(struct scsi_cmnd *);
-static int zfcp_scsi_eh_device_reset_handler(struct scsi_cmnd *);
-static int zfcp_scsi_eh_target_reset_handler(struct scsi_cmnd *);
-static int zfcp_scsi_eh_host_reset_handler(struct scsi_cmnd *);
-static int zfcp_task_management_function(struct zfcp_unit *, u8,
-					 struct scsi_cmnd *);
-
-static struct zfcp_unit *zfcp_unit_lookup(struct zfcp_adapter *, int,
-					  unsigned int, unsigned int);
-
-static struct device_attribute *zfcp_sysfs_sdev_attrs[];
-static struct device_attribute *zfcp_a_stats_attrs[];
-
-struct zfcp_data zfcp_data = {
-	.scsi_host_template = {
-		.name			= "zfcp",
-		.module			= THIS_MODULE,
-		.proc_name		= "zfcp",
-		.slave_alloc		= zfcp_scsi_slave_alloc,
-		.slave_configure	= zfcp_scsi_slave_configure,
-		.slave_destroy		= zfcp_scsi_slave_destroy,
-		.queuecommand		= zfcp_scsi_queuecommand,
-		.eh_abort_handler	= zfcp_scsi_eh_abort_handler,
-		.eh_device_reset_handler = zfcp_scsi_eh_device_reset_handler,
-		.eh_target_reset_handler = zfcp_scsi_eh_target_reset_handler,
-		.eh_host_reset_handler	= zfcp_scsi_eh_host_reset_handler,
-		.can_queue		= 4096,
-		.this_id		= -1,
-		.sg_tablesize		= ZFCP_MAX_SBALES_PER_REQ,
-		.cmd_per_lun		= 1,
-		.use_clustering		= 1,
-		.sdev_attrs		= zfcp_sysfs_sdev_attrs,
-		.max_sectors		= ZFCP_MAX_SECTORS,
-		.shost_attrs		= zfcp_a_stats_attrs,
-	},
-};
-
-/* Find start of Response Information in FCP response unit*/
-char *
-zfcp_get_fcp_rsp_info_ptr(struct fcp_rsp_iu *fcp_rsp_iu)
-{
-	char *fcp_rsp_info_ptr;
-
-	fcp_rsp_info_ptr =
-	    (unsigned char *) fcp_rsp_iu + (sizeof (struct fcp_rsp_iu));
-
-	return fcp_rsp_info_ptr;
-}
-
 /* Find start of Sense Information in FCP response unit*/
-char *
-zfcp_get_fcp_sns_info_ptr(struct fcp_rsp_iu *fcp_rsp_iu)
+char *zfcp_get_fcp_sns_info_ptr(struct fcp_rsp_iu *fcp_rsp_iu)
 {
 	char *fcp_sns_info_ptr;
 
-	fcp_sns_info_ptr =
-	    (unsigned char *) fcp_rsp_iu + (sizeof (struct fcp_rsp_iu));
+	fcp_sns_info_ptr = (unsigned char *) &fcp_rsp_iu[1];
 	if (fcp_rsp_iu->validity.bits.fcp_rsp_len_valid)
-		fcp_sns_info_ptr = (char *) fcp_sns_info_ptr +
-		    fcp_rsp_iu->fcp_rsp_len;
+		fcp_sns_info_ptr += fcp_rsp_iu->fcp_rsp_len;
 
 	return fcp_sns_info_ptr;
 }
 
-static fcp_dl_t *
-zfcp_get_fcp_dl_ptr(struct fcp_cmnd_iu * fcp_cmd)
+void zfcp_set_fcp_dl(struct fcp_cmnd_iu *fcp_cmd, fcp_dl_t fcp_dl)
 {
-	int additional_length = fcp_cmd->add_fcp_cdb_length << 2;
-	fcp_dl_t *fcp_dl_addr;
+	fcp_dl_t *fcp_dl_ptr;
 
-	fcp_dl_addr = (fcp_dl_t *)
-		((unsigned char *) fcp_cmd +
-		 sizeof (struct fcp_cmnd_iu) + additional_length);
 	/*
 	 * fcp_dl_addr = start address of fcp_cmnd structure +
 	 * size of fixed part + size of dynamically sized add_dcp_cdb field
 	 * SEE FCP-2 documentation
 	 */
-	return fcp_dl_addr;
-}
-
-fcp_dl_t
-zfcp_get_fcp_dl(struct fcp_cmnd_iu * fcp_cmd)
-{
-	return *zfcp_get_fcp_dl_ptr(fcp_cmd);
-}
-
-void
-zfcp_set_fcp_dl(struct fcp_cmnd_iu *fcp_cmd, fcp_dl_t fcp_dl)
-{
-	*zfcp_get_fcp_dl_ptr(fcp_cmd) = fcp_dl;
+	fcp_dl_ptr = (fcp_dl_t *) ((unsigned char *) &fcp_cmd[1] +
+				   (fcp_cmd->add_fcp_cdb_length << 2));
+	*fcp_dl_ptr = fcp_dl;
 }
 
-static int
-zfcp_scsi_slave_alloc(struct scsi_device *sdp)
-{
-	struct zfcp_adapter *adapter;
-	struct zfcp_unit *unit;
-	unsigned long flags;
-	int retval = -ENXIO;
-
-	adapter = (struct zfcp_adapter *) sdp->host->hostdata[0];
-	if (!adapter)
-		goto out;
-
-	read_lock_irqsave(&zfcp_data.config_lock, flags);
-	unit = zfcp_unit_lookup(adapter, sdp->channel, sdp->id, sdp->lun);
-	if (unit && atomic_test_mask(ZFCP_STATUS_UNIT_REGISTERED,
-				     &unit->status)) {
-		sdp->hostdata = unit;
-		unit->device = sdp;
-		zfcp_unit_get(unit);
-		retval = 0;
-	}
-	read_unlock_irqrestore(&zfcp_data.config_lock, flags);
- out:
-	return retval;
-}
-
-/**
- * zfcp_scsi_slave_destroy - called when scsi device is removed
- *
- * Remove reference to associated scsi device for an zfcp_unit.
- * Mark zfcp_unit as failed. The scsi device might be deleted via sysfs
- * or a scan for this device might have failed.
- */
 static void zfcp_scsi_slave_destroy(struct scsi_device *sdpnt)
 {
 	struct zfcp_unit *unit = (struct zfcp_unit *) sdpnt->hostdata;
@@ -153,26 +48,16 @@ static void zfcp_scsi_slave_destroy(stru
 	}
 }
 
-/*
- * called from scsi midlayer to allow finetuning of a device.
- */
-static int
-zfcp_scsi_slave_configure(struct scsi_device *sdp)
+static int zfcp_scsi_slave_configure(struct scsi_device *sdp)
 {
 	if (sdp->tagged_supported)
-		scsi_adjust_queue_depth(sdp, MSG_SIMPLE_TAG, ZFCP_CMND_PER_LUN);
+		scsi_adjust_queue_depth(sdp, MSG_SIMPLE_TAG, 32);
 	else
 		scsi_adjust_queue_depth(sdp, 0, 1);
 	return 0;
 }
 
-/**
- * zfcp_scsi_command_fail - set result in scsi_cmnd and call scsi_done function
- * @scpnt: pointer to struct scsi_cmnd where result is set
- * @result: result to be set in scpnt (e.g. DID_ERROR)
- */
-static void
-zfcp_scsi_command_fail(struct scsi_cmnd *scpnt, int result)
+static void zfcp_scsi_command_fail(struct scsi_cmnd *scpnt, int result)
 {
 	set_host_byte(scpnt, result);
 	if ((scpnt->device != NULL) && (scpnt->device->host != NULL))
@@ -183,104 +68,13 @@ zfcp_scsi_command_fail(struct scsi_cmnd 
 	scpnt->scsi_done(scpnt);
 }
 
-/**
- * zfcp_scsi_command_async - worker for zfcp_scsi_queuecommand and
- *	zfcp_scsi_command_sync
- * @adapter: adapter where scsi command is issued
- * @unit: unit to which scsi command is sent
- * @scpnt: scsi command to be sent
- * @timer: timer to be started if request is successfully initiated
- *
- * Note: In scsi_done function must be set in scpnt.
- */
-int
-zfcp_scsi_command_async(struct zfcp_adapter *adapter, struct zfcp_unit *unit,
-			struct scsi_cmnd *scpnt, int use_timer)
-{
-	int tmp;
-	int retval;
-
-	retval = 0;
-
-	BUG_ON((adapter == NULL) || (adapter != unit->port->adapter));
-	BUG_ON(scpnt->scsi_done == NULL);
-
-	if (unlikely(NULL == unit)) {
-		zfcp_scsi_command_fail(scpnt, DID_NO_CONNECT);
-		goto out;
-	}
-
-	if (unlikely(
-	      atomic_test_mask(ZFCP_STATUS_COMMON_ERP_FAILED, &unit->status) ||
-	     !atomic_test_mask(ZFCP_STATUS_COMMON_RUNNING, &unit->status))) {
-		zfcp_scsi_command_fail(scpnt, DID_ERROR);
-		goto out;
-	}
-
-	tmp = zfcp_fsf_send_fcp_command_task(adapter, unit, scpnt, use_timer,
-					     ZFCP_REQ_AUTO_CLEANUP);
-	if (unlikely(tmp == -EBUSY)) {
-		zfcp_scsi_command_fail(scpnt, DID_NO_CONNECT);
-		goto out;
-	}
-
-	if (unlikely(tmp < 0))
-		retval = SCSI_MLQUEUE_HOST_BUSY;
-
-out:
-	return retval;
-}
-
-static void
-zfcp_scsi_command_sync_handler(struct scsi_cmnd *scpnt)
-{
-	struct completion *wait = (struct completion *) scpnt->SCp.ptr;
-	complete(wait);
-}
-
-
-/**
- * zfcp_scsi_command_sync - send a SCSI command and wait for completion
- * @unit: unit where command is sent to
- * @scpnt: scsi command to be sent
- * @use_timer: indicates whether timer should be setup or not
- * Return: 0
- *
- * Errors are indicated in scpnt->result
- */
-int
-zfcp_scsi_command_sync(struct zfcp_unit *unit, struct scsi_cmnd *scpnt,
-		       int use_timer)
-{
-	int ret;
-	DECLARE_COMPLETION_ONSTACK(wait);
-
-	scpnt->SCp.ptr = (void *) &wait;  /* silent re-use */
-	scpnt->scsi_done = zfcp_scsi_command_sync_handler;
-	ret = zfcp_scsi_command_async(unit->port->adapter, unit, scpnt,
-				      use_timer);
-	if (ret == 0)
-		wait_for_completion(&wait);
-
-	scpnt->SCp.ptr = NULL;
-
-	return 0;
-}
-
-/*
- * function:	zfcp_scsi_queuecommand
- *
- * purpose:	enqueues a SCSI command to the specified target device
- *
- * returns:	0 - success, SCSI command enqueued
- *		!0 - failure
- */
-static int
-zfcp_scsi_queuecommand(struct scsi_cmnd *scpnt,
-		       void (*done) (struct scsi_cmnd *))
+static int zfcp_scsi_queuecommand(struct scsi_cmnd *scpnt,
+				  void (*done) (struct scsi_cmnd *))
 {
 	struct zfcp_unit *unit;
 	struct zfcp_adapter *adapter;
+	int    status;
+	int    ret;
 
 	/* reset the status for this request */
 	scpnt->result = 0;
@@ -292,44 +86,76 @@ zfcp_scsi_queuecommand(struct scsi_cmnd 
 	 * (stored there by zfcp_scsi_slave_alloc)
 	 */
 	adapter = (struct zfcp_adapter *) scpnt->device->host->hostdata[0];
-	unit = (struct zfcp_unit *) scpnt->device->hostdata;
+	unit = scpnt->device->hostdata;
+
+	BUG_ON(!adapter || (adapter != unit->port->adapter));
+	BUG_ON(!scpnt->scsi_done);
+
+	if (unlikely(!unit)) {
+		zfcp_scsi_command_fail(scpnt, DID_NO_CONNECT);
+		return 0;
+	}
+
+	status = atomic_read(&unit->status);
+	if (unlikely((status & ZFCP_STATUS_COMMON_ERP_FAILED) ||
+		     !(status & ZFCP_STATUS_COMMON_RUNNING))) {
+		zfcp_scsi_command_fail(scpnt, DID_ERROR);
+		return 0;;
+	}
+
+	ret = zfcp_fsf_send_fcp_command_task(adapter, unit, scpnt, 0,
+					     ZFCP_REQ_AUTO_CLEANUP);
+	if (unlikely(ret == -EBUSY))
+		zfcp_scsi_command_fail(scpnt, DID_NO_CONNECT);
+	else if (unlikely(ret < 0))
+		return SCSI_MLQUEUE_HOST_BUSY;
 
-	return zfcp_scsi_command_async(adapter, unit, scpnt, 0);
+	return ret;
 }
 
-static struct zfcp_unit *
-zfcp_unit_lookup(struct zfcp_adapter *adapter, int channel, unsigned int id,
-		 unsigned int lun)
+static struct zfcp_unit *zfcp_unit_lookup(struct zfcp_adapter *adapter,
+					  int channel, unsigned int id,
+					  unsigned int lun)
 {
 	struct zfcp_port *port;
-	struct zfcp_unit *unit, *retval = NULL;
+	struct zfcp_unit *unit;
 
 	list_for_each_entry(port, &adapter->port_list_head, list) {
 		if (!port->rport || (id != port->rport->scsi_target_id))
 			continue;
 		list_for_each_entry(unit, &port->unit_list_head, list)
-			if (lun == unit->scsi_lun) {
-				retval = unit;
-				goto out;
-			}
+			if (lun == unit->scsi_lun)
+				return unit;
 	}
- out:
+
+	return NULL;
+}
+
+static int zfcp_scsi_slave_alloc(struct scsi_device *sdp)
+{
+	struct zfcp_adapter *adapter;
+	struct zfcp_unit *unit;
+	unsigned long flags;
+	int retval = -ENXIO;
+
+	adapter = (struct zfcp_adapter *) sdp->host->hostdata[0];
+	if (!adapter)
+		goto out;
+
+	read_lock_irqsave(&zfcp_data.config_lock, flags);
+	unit = zfcp_unit_lookup(adapter, sdp->channel, sdp->id, sdp->lun);
+	if (unit &&
+	    (atomic_read(&unit->status) & ZFCP_STATUS_UNIT_REGISTERED)) {
+		sdp->hostdata = unit;
+		unit->device = sdp;
+		zfcp_unit_get(unit);
+		retval = 0;
+	}
+	read_unlock_irqrestore(&zfcp_data.config_lock, flags);
+out:
 	return retval;
 }
 
-/**
- * zfcp_scsi_eh_abort_handler - abort the specified SCSI command
- * @scpnt: pointer to scsi_cmnd to be aborted
- * Return: SUCCESS - command has been aborted and cleaned up in internal
- *          bookkeeping, SCSI stack won't be called for aborted command
- *         FAILED - otherwise
- *
- * We do not need to care for a SCSI command which completes normally
- * but late during this abort routine runs.  We are allowed to return
- * late commands to the SCSI stack.  It tracks the state of commands and
- * will handle late commands.  (Usually, the normal completion of late
- * commands is ignored with respect to the running abort operation.)
- */
 static int zfcp_scsi_eh_abort_handler(struct scsi_cmnd *scpnt)
 {
  	struct Scsi_Host *scsi_host;
@@ -337,30 +163,27 @@ static int zfcp_scsi_eh_abort_handler(st
 	struct zfcp_unit *unit;
 	struct zfcp_fsf_req *fsf_req;
 	unsigned long flags;
-	unsigned long old_req_id;
+	unsigned long old_req_id = (unsigned long) scpnt->host_scribble;
 	int retval = SUCCESS;
 
 	scsi_host = scpnt->device->host;
 	adapter = (struct zfcp_adapter *) scsi_host->hostdata[0];
-	unit = (struct zfcp_unit *) scpnt->device->hostdata;
+	unit = scpnt->device->hostdata;
 
 	/* avoid race condition between late normal completion and abort */
 	write_lock_irqsave(&adapter->abort_lock, flags);
 
 	/* Check whether corresponding fsf_req is still pending */
 	spin_lock(&adapter->req_list_lock);
-	fsf_req = zfcp_reqlist_find(adapter,
-				    (unsigned long) scpnt->host_scribble);
+	fsf_req = zfcp_reqlist_find(adapter, old_req_id);
 	spin_unlock(&adapter->req_list_lock);
 	if (!fsf_req) {
 		write_unlock_irqrestore(&adapter->abort_lock, flags);
 		zfcp_scsi_dbf_event_abort("lte1", adapter, scpnt, NULL, 0);
-		retval = SUCCESS;
-		goto out;
+		return retval;
 	}
 	fsf_req->data = 0;
 	fsf_req->status |= ZFCP_STATUS_FSFREQ_ABORTING;
-	old_req_id = fsf_req->req_id;
 
 	/* don't access old fsf_req after releasing the abort_lock */
 	write_unlock_irqrestore(&adapter->abort_lock, flags);
@@ -370,7 +193,7 @@ static int zfcp_scsi_eh_abort_handler(st
 		zfcp_scsi_dbf_event_abort("nres", adapter, scpnt, NULL,
 					  old_req_id);
 		retval = FAILED;
-		goto out;
+		return retval;
 	}
 
 	__wait_event(fsf_req->completion_wq,
@@ -378,62 +201,30 @@ static int zfcp_scsi_eh_abort_handler(st
 
 	if (fsf_req->status & ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED) {
 		zfcp_scsi_dbf_event_abort("okay", adapter, scpnt, fsf_req, 0);
-		retval = SUCCESS;
 	} else if (fsf_req->status & ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED) {
 		zfcp_scsi_dbf_event_abort("lte2", adapter, scpnt, fsf_req, 0);
-		retval = SUCCESS;
 	} else {
 		zfcp_scsi_dbf_event_abort("fail", adapter, scpnt, fsf_req, 0);
 		retval = FAILED;
 	}
 	zfcp_fsf_req_free(fsf_req);
- out:
-	return retval;
-}
-
-static int zfcp_scsi_eh_device_reset_handler(struct scsi_cmnd *scpnt)
-{
-	int retval;
-	struct zfcp_unit *unit = scpnt->device->hostdata;
 
-	if (!unit) {
-		WARN_ON(1);
-		return SUCCESS;
-	}
-	retval = zfcp_task_management_function(unit,
-					       FCP_LOGICAL_UNIT_RESET,
-					       scpnt);
-	return retval ? FAILED : SUCCESS;
-}
-
-static int zfcp_scsi_eh_target_reset_handler(struct scsi_cmnd *scpnt)
-{
-	int retval;
-	struct zfcp_unit *unit = scpnt->device->hostdata;
-
-	if (!unit) {
-		WARN_ON(1);
-		return SUCCESS;
-	}
-	retval = zfcp_task_management_function(unit, FCP_TARGET_RESET, scpnt);
-	return retval ? FAILED : SUCCESS;
+	return retval;
 }
 
-static int
-zfcp_task_management_function(struct zfcp_unit *unit, u8 tm_flags,
-			      struct scsi_cmnd *scpnt)
+static int zfcp_task_mgmt_function(struct zfcp_unit *unit, u8 tm_flags,
+					 struct scsi_cmnd *scpnt)
 {
 	struct zfcp_adapter *adapter = unit->port->adapter;
 	struct zfcp_fsf_req *fsf_req;
-	int retval = 0;
+	int retval = SUCCESS;
 
 	/* issue task management function */
 	fsf_req = zfcp_fsf_send_fcp_command_task_management
 		(adapter, unit, tm_flags, 0);
 	if (!fsf_req) {
 		zfcp_scsi_dbf_event_devreset("nres", tm_flags, unit, scpnt);
-		retval = -ENOMEM;
-		goto out;
+		return FAILED;
 	}
 
 	__wait_event(fsf_req->completion_wq,
@@ -444,27 +235,46 @@ zfcp_task_management_function(struct zfc
 	 */
 	if (fsf_req->status & ZFCP_STATUS_FSFREQ_TMFUNCFAILED) {
 		zfcp_scsi_dbf_event_devreset("fail", tm_flags, unit, scpnt);
-		retval = -EIO;
+		retval = FAILED;
 	} else if (fsf_req->status & ZFCP_STATUS_FSFREQ_TMFUNCNOTSUPP) {
 		zfcp_scsi_dbf_event_devreset("nsup", tm_flags, unit, scpnt);
-		retval = -ENOTSUPP;
+		retval = FAILED;
 	} else
 		zfcp_scsi_dbf_event_devreset("okay", tm_flags, unit, scpnt);
 
 	zfcp_fsf_req_free(fsf_req);
- out:
+
 	return retval;
 }
 
-/**
- * zfcp_scsi_eh_host_reset_handler - handler for host reset
- */
+static int zfcp_scsi_eh_device_reset_handler(struct scsi_cmnd *scpnt)
+{
+	struct zfcp_unit *unit = scpnt->device->hostdata;
+
+	if (!unit) {
+		WARN_ON(1);
+		return SUCCESS;
+	}
+	return zfcp_task_mgmt_function(unit, FCP_LOGICAL_UNIT_RESET, scpnt);
+}
+
+static int zfcp_scsi_eh_target_reset_handler(struct scsi_cmnd *scpnt)
+{
+	struct zfcp_unit *unit = scpnt->device->hostdata;
+
+	if (!unit) {
+		WARN_ON(1);
+		return SUCCESS;
+	}
+	return zfcp_task_mgmt_function(unit, FCP_TARGET_RESET, scpnt);
+}
+
 static int zfcp_scsi_eh_host_reset_handler(struct scsi_cmnd *scpnt)
 {
 	struct zfcp_unit *unit;
 	struct zfcp_adapter *adapter;
 
-	unit = (struct zfcp_unit*) scpnt->device->hostdata;
+	unit = scpnt->device->hostdata;
 	adapter = unit->port->adapter;
 	zfcp_erp_adapter_reopen(adapter, 0, 141, scpnt);
 	zfcp_erp_wait(adapter);
@@ -472,51 +282,43 @@ static int zfcp_scsi_eh_host_reset_handl
 	return SUCCESS;
 }
 
-int
-zfcp_adapter_scsi_register(struct zfcp_adapter *adapter)
+int zfcp_adapter_scsi_register(struct zfcp_adapter *adapter)
 {
-	int retval = 0;
-	static unsigned int unique_id = 0;
+	struct ccw_dev_id dev_id;
 
 	if (adapter->scsi_host)
-		goto out;
+		return 0;
 
+	ccw_device_get_id(adapter->ccw_device, &dev_id);
 	/* register adapter as SCSI host with mid layer of SCSI stack */
 	adapter->scsi_host = scsi_host_alloc(&zfcp_data.scsi_host_template,
 					     sizeof (struct zfcp_adapter *));
 	if (!adapter->scsi_host) {
 		dev_err(&adapter->ccw_device->dev,
 			"registration with SCSI stack failed.");
-		retval = -EIO;
-		goto out;
+		return -EIO;
 	}
 
 	/* tell the SCSI stack some characteristics of this adapter */
 	adapter->scsi_host->max_id = 1;
 	adapter->scsi_host->max_lun = 1;
 	adapter->scsi_host->max_channel = 0;
-	adapter->scsi_host->unique_id = unique_id++;	/* FIXME */
-	adapter->scsi_host->max_cmd_len = ZFCP_MAX_SCSI_CMND_LENGTH;
+	adapter->scsi_host->unique_id = dev_id.devno;
+	adapter->scsi_host->max_cmd_len = 255;
 	adapter->scsi_host->transportt = zfcp_data.scsi_transport_template;
 
-	/*
-	 * save a pointer to our own adapter data structure within
-	 * hostdata field of SCSI host data structure
-	 */
 	adapter->scsi_host->hostdata[0] = (unsigned long) adapter;
 
 	if (scsi_add_host(adapter->scsi_host, &adapter->ccw_device->dev)) {
 		scsi_host_put(adapter->scsi_host);
-		retval = -EIO;
-		goto out;
+		return -EIO;
 	}
 	atomic_set_mask(ZFCP_STATUS_ADAPTER_REGISTERED, &adapter->status);
- out:
-	return retval;
+
+	return 0;
 }
 
-void
-zfcp_adapter_scsi_unregister(struct zfcp_adapter *adapter)
+void zfcp_adapter_scsi_unregister(struct zfcp_adapter *adapter)
 {
 	struct Scsi_Host *shost;
 	struct zfcp_port *port;
@@ -524,10 +326,12 @@ zfcp_adapter_scsi_unregister(struct zfcp
 	shost = adapter->scsi_host;
 	if (!shost)
 		return;
+
 	read_lock_irq(&zfcp_data.config_lock);
 	list_for_each_entry(port, &adapter->port_list_head, list)
 		if (port->rport)
 			port->rport = NULL;
+
 	read_unlock_irq(&zfcp_data.config_lock);
 	fc_remove_host(shost);
 	scsi_remove_host(shost);
@@ -538,9 +342,6 @@ zfcp_adapter_scsi_unregister(struct zfcp
 	return;
 }
 
-/*
- * Support functions for FC transport class
- */
 static struct fc_host_statistics*
 zfcp_init_fc_host_stats(struct zfcp_adapter *adapter)
 {
@@ -556,13 +357,12 @@ zfcp_init_fc_host_stats(struct zfcp_adap
 	return adapter->fc_stats;
 }
 
-static void
-zfcp_adjust_fc_host_stats(struct fc_host_statistics *fc_stats,
-			  struct fsf_qtcb_bottom_port *data,
-			  struct fsf_qtcb_bottom_port *old)
+static void zfcp_adjust_fc_host_stats(struct fc_host_statistics *fc_stats,
+				      struct fsf_qtcb_bottom_port *data,
+				      struct fsf_qtcb_bottom_port *old)
 {
-	fc_stats->seconds_since_last_reset = data->seconds_since_last_reset -
-		old->seconds_since_last_reset;
+	fc_stats->seconds_since_last_reset =
+		data->seconds_since_last_reset - old->seconds_since_last_reset;
 	fc_stats->tx_frames = data->tx_frames - old->tx_frames;
 	fc_stats->tx_words = data->tx_words - old->tx_words;
 	fc_stats->rx_frames = data->rx_frames - old->rx_frames;
@@ -573,26 +373,25 @@ zfcp_adjust_fc_host_stats(struct fc_host
 	fc_stats->dumped_frames = data->dumped_frames - old->dumped_frames;
 	fc_stats->link_failure_count = data->link_failure - old->link_failure;
 	fc_stats->loss_of_sync_count = data->loss_of_sync - old->loss_of_sync;
-	fc_stats->loss_of_signal_count = data->loss_of_signal -
-		old->loss_of_signal;
-	fc_stats->prim_seq_protocol_err_count = data->psp_error_counts -
-		old->psp_error_counts;
-	fc_stats->invalid_tx_word_count = data->invalid_tx_words -
-		old->invalid_tx_words;
+	fc_stats->loss_of_signal_count =
+		data->loss_of_signal - old->loss_of_signal;
+	fc_stats->prim_seq_protocol_err_count =
+		data->psp_error_counts - old->psp_error_counts;
+	fc_stats->invalid_tx_word_count =
+		data->invalid_tx_words - old->invalid_tx_words;
 	fc_stats->invalid_crc_count = data->invalid_crcs - old->invalid_crcs;
-	fc_stats->fcp_input_requests = data->input_requests -
-		old->input_requests;
-	fc_stats->fcp_output_requests = data->output_requests -
-		old->output_requests;
-	fc_stats->fcp_control_requests = data->control_requests -
-		old->control_requests;
+	fc_stats->fcp_input_requests =
+		data->input_requests - old->input_requests;
+	fc_stats->fcp_output_requests =
+		data->output_requests - old->output_requests;
+	fc_stats->fcp_control_requests =
+		data->control_requests - old->control_requests;
 	fc_stats->fcp_input_megabytes = data->input_mb - old->input_mb;
 	fc_stats->fcp_output_megabytes = data->output_mb - old->output_mb;
 }
 
-static void
-zfcp_set_fc_host_stats(struct fc_host_statistics *fc_stats,
-		       struct fsf_qtcb_bottom_port *data)
+static void zfcp_set_fc_host_stats(struct fc_host_statistics *fc_stats,
+				   struct fsf_qtcb_bottom_port *data)
 {
 	fc_stats->seconds_since_last_reset = data->seconds_since_last_reset;
 	fc_stats->tx_frames = data->tx_frames;
@@ -616,22 +415,14 @@ zfcp_set_fc_host_stats(struct fc_host_st
 	fc_stats->fcp_output_megabytes = data->output_mb;
 }
 
-/**
- * zfcp_get_fc_host_stats - provide fc_host_statistics for scsi_transport_fc
- *
- * assumption: scsi_transport_fc synchronizes calls of
- *             get_fc_host_stats and reset_fc_host_stats
- *             (XXX to be checked otherwise introduce locking)
- */
-static struct fc_host_statistics *
-zfcp_get_fc_host_stats(struct Scsi_Host *shost)
+static struct fc_host_statistics *zfcp_get_fc_host_stats(struct Scsi_Host *host)
 {
 	struct zfcp_adapter *adapter;
 	struct fc_host_statistics *fc_stats;
 	struct fsf_qtcb_bottom_port *data;
 	int ret;
 
-	adapter = (struct zfcp_adapter *)shost->hostdata[0];
+	adapter = (struct zfcp_adapter *)host->hostdata[0];
 	fc_stats = zfcp_init_fc_host_stats(adapter);
 	if (!fc_stats)
 		return NULL;
@@ -643,26 +434,25 @@ zfcp_get_fc_host_stats(struct Scsi_Host 
 	ret = zfcp_fsf_exchange_port_data_sync(adapter, data);
 	if (ret) {
 		kfree(data);
-		return NULL; /* XXX return zeroed fc_stats? */
+		return NULL;
 	}
 
 	if (adapter->stats_reset &&
 	    ((jiffies/HZ - adapter->stats_reset) <
-	     data->seconds_since_last_reset)) {
+	     data->seconds_since_last_reset))
 		zfcp_adjust_fc_host_stats(fc_stats, data,
 					  adapter->stats_reset_data);
-	} else
+	else
 		zfcp_set_fc_host_stats(fc_stats, data);
 
 	kfree(data);
 	return fc_stats;
 }
 
-static void
-zfcp_reset_fc_host_stats(struct Scsi_Host *shost)
+static void zfcp_reset_fc_host_stats(struct Scsi_Host *shost)
 {
 	struct zfcp_adapter *adapter;
-	struct fsf_qtcb_bottom_port *data, *old_data;
+	struct fsf_qtcb_bottom_port *data;
 	int ret;
 
 	adapter = (struct zfcp_adapter *)shost->hostdata[0];
@@ -671,14 +461,13 @@ zfcp_reset_fc_host_stats(struct Scsi_Hos
 		return;
 
 	ret = zfcp_fsf_exchange_port_data_sync(adapter, data);
-	if (ret) {
+	if (ret)
 		kfree(data);
-	} else {
+	else {
 		adapter->stats_reset = jiffies/HZ;
-		old_data = adapter->stats_reset_data;
+		kfree(adapter->stats_reset_data);
 		adapter->stats_reset_data = data; /* finally freed in
-						     adater_dequeue */
-		kfree(old_data);
+						     adapter_dequeue */
 	}
 }
 
@@ -793,14 +582,6 @@ ZFCP_DEFINE_LATENCY_ATTR(read);
 ZFCP_DEFINE_LATENCY_ATTR(write);
 ZFCP_DEFINE_LATENCY_ATTR(cmd);
 
-/**
- * ZFCP_DEFINE_SCSI_ATTR
- * @_name:   name of show attribute
- * @_format: format string
- * @_value:  value to print
- *
- * Generates attribute for a unit.
- */
 #define ZFCP_DEFINE_SCSI_ATTR(_name, _format, _value)                    \
 static ssize_t zfcp_sysfs_scsi_##_name##_show(struct device *dev, struct device_attribute *attr,        \
                                               char *buf)                 \
@@ -815,7 +596,8 @@ static ssize_t zfcp_sysfs_scsi_##_name##
                                                                          \
 static DEVICE_ATTR(_name, S_IRUGO, zfcp_sysfs_scsi_##_name##_show, NULL);
 
-ZFCP_DEFINE_SCSI_ATTR(hba_id, "%s\n", zfcp_get_busid_by_unit(unit));
+ZFCP_DEFINE_SCSI_ATTR(hba_id, "%s\n",
+	unit->port->adapter->ccw_device->dev.bus_id);
 ZFCP_DEFINE_SCSI_ATTR(wwpn, "0x%016llx\n", unit->port->wwpn);
 ZFCP_DEFINE_SCSI_ATTR(fcp_lun, "0x%016llx\n", unit->fcp_lun);
 
@@ -835,8 +617,8 @@ static ssize_t zfcp_sysfs_adapter_util_s
 {
 	struct Scsi_Host *scsi_host = dev_to_shost(dev);
 	struct fsf_qtcb_bottom_port *qtcb_port;
-	int retval;
 	struct zfcp_adapter *adapter;
+	int retval;
 
 	adapter = (struct zfcp_adapter *) scsi_host->hostdata[0];
 	if (!(adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA))
@@ -857,17 +639,17 @@ static ssize_t zfcp_sysfs_adapter_util_s
 static int zfcp_sysfs_adapter_ex_config(struct device *dev,
 					struct fsf_statistics_info *stat_inf)
 {
-	int retval;
-	struct fsf_qtcb_bottom_config *qtcb_config;
 	struct Scsi_Host *scsi_host = dev_to_shost(dev);
+	struct fsf_qtcb_bottom_config *qtcb_config;
 	struct zfcp_adapter *adapter;
+	int retval;
 
 	adapter = (struct zfcp_adapter *) scsi_host->hostdata[0];
 	if (!(adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA))
 		return -EOPNOTSUPP;
 
 	qtcb_config = kzalloc(sizeof(struct fsf_qtcb_bottom_config),
-			       GFP_KERNEL);
+			      GFP_KERNEL);
 	if (!qtcb_config)
 		return -ENOMEM;
 
@@ -940,3 +722,28 @@ static struct device_attribute *zfcp_a_s
 	&dev_attr_seconds_active,
 	NULL
 };
+
+struct zfcp_data zfcp_data = {
+	.scsi_host_template = {
+		.name			 = "zfcp",
+		.module			 = THIS_MODULE,
+		.proc_name		 = "zfcp",
+		.slave_alloc		 = zfcp_scsi_slave_alloc,
+		.slave_configure	 = zfcp_scsi_slave_configure,
+		.slave_destroy		 = zfcp_scsi_slave_destroy,
+		.queuecommand		 = zfcp_scsi_queuecommand,
+		.eh_abort_handler	 = zfcp_scsi_eh_abort_handler,
+		.eh_device_reset_handler = zfcp_scsi_eh_device_reset_handler,
+		.eh_target_reset_handler = zfcp_scsi_eh_target_reset_handler,
+		.eh_host_reset_handler	 = zfcp_scsi_eh_host_reset_handler,
+		.can_queue		 = 4096,
+		.this_id		 = -1,
+		.sg_tablesize		 = ZFCP_MAX_SBALES_PER_REQ,
+		.cmd_per_lun		 = 1,
+		.use_clustering		 = 1,
+		.sdev_attrs		 = zfcp_sysfs_sdev_attrs,
+		.max_sectors		 = (ZFCP_MAX_SBALES_PER_REQ * 8),
+		.shost_attrs		 = zfcp_a_stats_attrs,
+	},
+};
+
--- a/drivers/s390/scsi/zfcp_def.h	2008-06-30 11:01:46.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_def.h	2008-06-30 11:01:46.000000000 +0200
@@ -126,12 +126,6 @@ typedef unsigned int       fcp_dl_t;
 /* timeout for name-server lookup (in seconds) */
 #define ZFCP_NS_GID_PN_TIMEOUT		10
 
-/* largest SCSI command we can process */
-/* FCP-2 (FCP_CMND IU) allows up to (255-3+16) */
-#define ZFCP_MAX_SCSI_CMND_LENGTH	255
-/* maximum number of commands in LUN queue (tagged queueing) */
-#define ZFCP_CMND_PER_LUN               32
-
 /* task attribute values in FCP-2 FCP_CMND IU */
 #define SIMPLE_Q	0
 #define HEAD_OF_Q	1
--- a/drivers/s390/scsi/zfcp_ext.h	2008-06-30 11:01:46.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_ext.h	2008-06-30 11:01:46.000000000 +0200
@@ -102,13 +102,8 @@ extern void  zfcp_test_link(struct zfcp_
 extern int  zfcp_adapter_scsi_register(struct zfcp_adapter *);
 extern void zfcp_adapter_scsi_unregister(struct zfcp_adapter *);
 extern void zfcp_set_fcp_dl(struct fcp_cmnd_iu *, fcp_dl_t);
-extern char *zfcp_get_fcp_rsp_info_ptr(struct fcp_rsp_iu *);
 extern char *zfcp_get_fcp_sns_info_ptr(struct fcp_rsp_iu *);
-extern fcp_dl_t zfcp_get_fcp_dl(struct fcp_cmnd_iu *);
 
-extern int zfcp_scsi_command_async(struct zfcp_adapter *,struct zfcp_unit *,
-				   struct scsi_cmnd *, int);
-extern int zfcp_scsi_command_sync(struct zfcp_unit *, struct scsi_cmnd *, int);
 extern struct fc_function_template zfcp_transport_functions;
 
 /******************************** ERP ****************************************/
--- a/drivers/s390/scsi/zfcp_dbf.c	2008-06-30 11:01:46.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_dbf.c	2008-06-30 11:01:46.000000000 +0200
@@ -1065,8 +1065,7 @@ static void zfcp_scsi_dbf_event(const ch
 			if (fsf_req != NULL) {
 				fcp_rsp = (struct fcp_rsp_iu *)
 				    &(fsf_req->qtcb->bottom.io.fcp_rsp);
-				fcp_rsp_info =
-				    zfcp_get_fcp_rsp_info_ptr(fcp_rsp);
+				fcp_rsp_info = (unsigned char *) &fcp_rsp[1];
 				fcp_sns_info =
 				    zfcp_get_fcp_sns_info_ptr(fcp_rsp);
 
--- a/drivers/s390/scsi/zfcp_fsf.c	2008-06-30 11:01:46.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_fsf.c	2008-06-30 11:01:46.000000000 +0200
@@ -3027,7 +3027,7 @@ zfcp_fsf_send_fcp_command_task_handler(s
 	struct fcp_rsp_iu *fcp_rsp_iu = (struct fcp_rsp_iu *)
 	    &(fsf_req->qtcb->bottom.io.fcp_rsp);
 	u32 sns_len;
-	char *fcp_rsp_info = zfcp_get_fcp_rsp_info_ptr(fcp_rsp_iu);
+	char *fcp_rsp_info = (unsigned char *) &fcp_rsp_iu[1];
 	unsigned long flags;
 
 	read_lock_irqsave(&fsf_req->adapter->abort_lock, flags);
@@ -3145,7 +3145,7 @@ zfcp_fsf_send_fcp_command_task_managemen
 	int retval = 0;
 	struct fcp_rsp_iu *fcp_rsp_iu = (struct fcp_rsp_iu *)
 	    &(fsf_req->qtcb->bottom.io.fcp_rsp);
-	char *fcp_rsp_info = zfcp_get_fcp_rsp_info_ptr(fcp_rsp_iu);
+	char *fcp_rsp_info = (unsigned char *) &fcp_rsp_iu[1];
 
 	if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
 		fsf_req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;

-- 

[patch 07/11] zfcp: Cleanup of code in zfcp_aux.c

[christof.schmitt]

[-- Attachment #1: aux-cleanup.diff --]
[-- Type: text/plain, Size: 33752 bytes --]

From: Swen Schillig <swen@vnet.ibm.com>

Overall cleanup of zfcp_aux.c to simplify code and follow kernel
coding style.

Signed-off-by: Swen Schillig <swen@vnet.ibm.com>
Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com>
---
 drivers/s390/scsi/zfcp_aux.c        |  580 +++++++++++++-----------------------
 drivers/s390/scsi/zfcp_ccw.c        |    4 
 drivers/s390/scsi/zfcp_def.h        |   13 
 drivers/s390/scsi/zfcp_erp.c        |    2 
 drivers/s390/scsi/zfcp_ext.h        |    4 
 drivers/s390/scsi/zfcp_fc.c         |   18 -
 drivers/s390/scsi/zfcp_sysfs_port.c |    2 
 7 files changed, 232 insertions(+), 391 deletions(-)

--- a/drivers/s390/scsi/zfcp_aux.c	2008-06-30 12:32:40.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_aux.c	2008-06-30 12:37:00.000000000 +0200
@@ -29,48 +29,14 @@
 #include "zfcp_ext.h"
 
 static char *device;
-/*********************** FUNCTION PROTOTYPES *********************************/
-
-/* written against the module interface */
-static int __init  zfcp_module_init(void);
-
-/*********************** KERNEL/MODULE PARAMETERS  ***************************/
-
-/* declare driver module init/cleanup functions */
-module_init(zfcp_module_init);
 
 MODULE_AUTHOR("IBM Deutschland Entwicklung GmbH - linux390@de.ibm.com");
-MODULE_DESCRIPTION
-    ("FCP (SCSI over Fibre Channel) HBA driver for IBM System z9 and zSeries");
+MODULE_DESCRIPTION("FCP HBA driver");
 MODULE_LICENSE("GPL");
 
 module_param(device, charp, 0400);
 MODULE_PARM_DESC(device, "specify initial device");
 
-/****************************************************************/
-/************** Functions without logging ***********************/
-/****************************************************************/
-
-void
-_zfcp_hex_dump(char *addr, int count)
-{
-	int i;
-	for (i = 0; i < count; i++) {
-		printk("%02x", addr[i]);
-		if ((i % 4) == 3)
-			printk(" ");
-		if ((i % 32) == 31)
-			printk("\n");
-	}
-	if (((i-1) % 32) != 31)
-		printk("\n");
-}
-
-
-/****************************************************************/
-/****** Functions to handle the request ID hash table    ********/
-/****************************************************************/
-
 static int zfcp_reqlist_alloc(struct zfcp_adapter *adapter)
 {
 	int idx;
@@ -85,11 +51,12 @@ static int zfcp_reqlist_alloc(struct zfc
 	return 0;
 }
 
-static void zfcp_reqlist_free(struct zfcp_adapter *adapter)
-{
-	kfree(adapter->req_list);
-}
-
+/**
+ * zfcp_reqlist_isempty - is the request list empty
+ * @adapter: pointer to struct zfcp_adapter
+ *
+ * Returns: true if list is empty, false otherwise
+ */
 int zfcp_reqlist_isempty(struct zfcp_adapter *adapter)
 {
 	unsigned int idx;
@@ -100,62 +67,48 @@ int zfcp_reqlist_isempty(struct zfcp_ada
 	return 1;
 }
 
-/****************************************************************/
-/************** Uncategorised Functions *************************/
-/****************************************************************/
-
-/**
- * zfcp_device_setup - setup function
- * @str: pointer to parameter string
- *
- * Parse "device=..." parameter string.
- */
-static int __init
-zfcp_device_setup(char *devstr)
+static int __init zfcp_device_setup(char *devstr)
 {
-	char *tmp, *str;
-	size_t len;
+	char *token;
 
 	if (!devstr)
 		return 0;
 
-	len = strlen(devstr) + 1;
-	str = kmalloc(len, GFP_KERNEL);
-	if (!str) {
-		pr_err("zfcp: Could not allocate memory for "
-		       "device parameter string, device not attached.\n");
-		return 0;
-	}
-	memcpy(str, devstr, len);
-
-	tmp = strchr(str, ',');
-	if (!tmp)
+	token = strsep(&devstr, ",");
+	if (!token || strlen(token) >= BUS_ID_SIZE)
 		goto err_out;
-	*tmp++ = '\0';
-	strncpy(zfcp_data.init_busid, str, BUS_ID_SIZE);
-	zfcp_data.init_busid[BUS_ID_SIZE-1] = '\0';
+	strncpy(zfcp_data.init_busid, token, BUS_ID_SIZE);
 
-	zfcp_data.init_wwpn = simple_strtoull(tmp, &tmp, 0);
-	if (*tmp++ != ',')
-		goto err_out;
-	if (*tmp == '\0')
+	token = strsep(&devstr, ",");
+	if (!token || strict_strtoull(token, 0, &zfcp_data.init_wwpn))
 		goto err_out;
 
-	zfcp_data.init_fcp_lun = simple_strtoull(tmp, &tmp, 0);
-	if (*tmp != '\0')
+	token = strsep(&devstr, ",");
+	if (!token || strict_strtoull(token, 0, &zfcp_data.init_fcp_lun))
 		goto err_out;
-	kfree(str);
 	return 1;
 
  err_out:
 	pr_err("zfcp: Parse error for device parameter string %s, "
-	       "device not attached.\n", str);
-	kfree(str);
+	       "device not attached.\n", devstr);
 	return 0;
 }
 
-static void __init
-zfcp_init_device_configure(void)
+static struct zfcp_adapter *zfcp_get_adapter_by_busid(char *bus_id)
+{
+	struct zfcp_adapter *adapter;
+
+	list_for_each_entry(adapter, &zfcp_data.adapter_list_head, list)
+		if ((strncmp(bus_id, adapter->ccw_device->dev.bus_id,
+			     BUS_ID_SIZE) == 0) &&
+		    !(atomic_read(&adapter->status) &
+		      ZFCP_STATUS_COMMON_REMOVE))
+		    return adapter;
+	return NULL;
+}
+
+
+static void __init zfcp_init_device_configure(void)
 {
 	struct zfcp_adapter *adapter;
 	struct zfcp_port *port;
@@ -168,92 +121,72 @@ zfcp_init_device_configure(void)
 		zfcp_adapter_get(adapter);
 	read_unlock_irq(&zfcp_data.config_lock);
 
-	if (adapter == NULL)
+	if (!adapter)
 		goto out_adapter;
 	port = zfcp_port_enqueue(adapter, zfcp_data.init_wwpn, 0, 0);
-	if (!port)
+	if (IS_ERR(port))
 		goto out_port;
 	unit = zfcp_unit_enqueue(port, zfcp_data.init_fcp_lun);
-	if (!unit)
+	if (IS_ERR(unit))
 		goto out_unit;
 	up(&zfcp_data.config_sema);
 	ccw_device_set_online(adapter->ccw_device);
 	zfcp_erp_wait(adapter);
 	down(&zfcp_data.config_sema);
 	zfcp_unit_put(unit);
- out_unit:
+out_unit:
 	zfcp_port_put(port);
- out_port:
+out_port:
 	zfcp_adapter_put(adapter);
- out_adapter:
+out_adapter:
 	up(&zfcp_data.config_sema);
 	return;
 }
 
-static int calc_alignment(int size)
+static struct kmem_cache *zfcp_cache_create(int size, char *name)
 {
 	int align = 1;
-
-	if (!size)
-		return 0;
-
 	while ((size - align) > 0)
 		align <<= 1;
-
-	return align;
+	return kmem_cache_create(name , size, align, 0, NULL);
 }
 
-static int __init
-zfcp_module_init(void)
+static int __init zfcp_module_init(void)
 {
 	int retval = -ENOMEM;
-	int size, align;
 
-	size = sizeof(struct zfcp_fsf_req_qtcb);
-	align = calc_alignment(size);
-	zfcp_data.fsf_req_qtcb_cache =
-		kmem_cache_create("zfcp_fsf", size, align, 0, NULL);
+	zfcp_data.fsf_req_qtcb_cache = zfcp_cache_create(
+			sizeof(struct zfcp_fsf_req_qtcb), "zfcp_fsf");
 	if (!zfcp_data.fsf_req_qtcb_cache)
 		goto out;
 
-	size = sizeof(struct fsf_status_read_buffer);
-	align = calc_alignment(size);
-	zfcp_data.sr_buffer_cache =
-		kmem_cache_create("zfcp_sr", size, align, 0, NULL);
+	zfcp_data.sr_buffer_cache = zfcp_cache_create(
+			sizeof(struct fsf_status_read_buffer), "zfcp_sr");
 	if (!zfcp_data.sr_buffer_cache)
 		goto out_sr_cache;
 
-	size = sizeof(struct zfcp_gid_pn_data);
-	align = calc_alignment(size);
-	zfcp_data.gid_pn_cache =
-		kmem_cache_create("zfcp_gid", size, align, 0, NULL);
+	zfcp_data.gid_pn_cache = zfcp_cache_create(
+			sizeof(struct zfcp_gid_pn_data), "zfcp_gid");
 	if (!zfcp_data.gid_pn_cache)
 		goto out_gid_cache;
 
-	/* initialize adapter list */
 	INIT_LIST_HEAD(&zfcp_data.adapter_list_head);
-
-	/* initialize adapters to be removed list head */
 	INIT_LIST_HEAD(&zfcp_data.adapter_remove_lh);
 
+	sema_init(&zfcp_data.config_sema, 1);
+	rwlock_init(&zfcp_data.config_lock);
+
 	zfcp_data.scsi_transport_template =
 		fc_attach_transport(&zfcp_transport_functions);
 	if (!zfcp_data.scsi_transport_template)
 		goto out_transport;
 
 	retval = misc_register(&zfcp_cfdc_misc);
-	if (retval != 0) {
+	if (retval) {
 		pr_err("zfcp: registration of misc device zfcp_cfdc failed\n");
 		goto out_misc;
 	}
 
-	/* Initialise proc semaphores */
-	sema_init(&zfcp_data.config_sema, 1);
-
-	/* initialise configuration rw lock */
-	rwlock_init(&zfcp_data.config_lock);
-
-	/* setup dynamic I/O */
 	retval = zfcp_ccw_register();
 	if (retval) {
 		pr_err("zfcp: Registration with common I/O layer failed.\n");
@@ -265,157 +198,83 @@ zfcp_module_init(void)
 
 	goto out;
 
- out_ccw_register:
+out_ccw_register:
 	misc_deregister(&zfcp_cfdc_misc);
- out_misc:
+out_misc:
 	fc_release_transport(zfcp_data.scsi_transport_template);
- out_transport:
+out_transport:
 	kmem_cache_destroy(zfcp_data.gid_pn_cache);
- out_gid_cache:
+out_gid_cache:
 	kmem_cache_destroy(zfcp_data.sr_buffer_cache);
- out_sr_cache:
+out_sr_cache:
 	kmem_cache_destroy(zfcp_data.fsf_req_qtcb_cache);
- out:
+out:
 	return retval;
 }
 
-/****************************************************************/
-/****** Functions for configuration/set-up of structures ********/
-/****************************************************************/
+module_init(zfcp_module_init);
 
 /**
  * zfcp_get_unit_by_lun - find unit in unit list of port by FCP LUN
  * @port: pointer to port to search for unit
  * @fcp_lun: FCP LUN to search for
- * Traverse list of all units of a port and return pointer to a unit
- * with the given FCP LUN.
+ *
+ * Returns: pointer to zfcp_unit or NULL
  */
-struct zfcp_unit *
-zfcp_get_unit_by_lun(struct zfcp_port *port, fcp_lun_t fcp_lun)
+struct zfcp_unit *zfcp_get_unit_by_lun(struct zfcp_port *port,
+				       fcp_lun_t fcp_lun)
 {
 	struct zfcp_unit *unit;
-	int found = 0;
 
-	list_for_each_entry(unit, &port->unit_list_head, list) {
+	list_for_each_entry(unit, &port->unit_list_head, list)
 		if ((unit->fcp_lun == fcp_lun) &&
-		    !atomic_test_mask(ZFCP_STATUS_COMMON_REMOVE, &unit->status))
-		{
-			found = 1;
-			break;
-		}
-	}
-	return found ? unit : NULL;
+		    !(atomic_read(&unit->status) & ZFCP_STATUS_COMMON_REMOVE))
+		    return unit;
+	return NULL;
 }
 
 /**
  * zfcp_get_port_by_wwpn - find port in port list of adapter by wwpn
  * @adapter: pointer to adapter to search for port
  * @wwpn: wwpn to search for
- * Traverse list of all ports of an adapter and return pointer to a port
- * with the given wwpn.
+ *
+ * Returns: pointer to zfcp_port or NULL
  */
-struct zfcp_port *
-zfcp_get_port_by_wwpn(struct zfcp_adapter *adapter, wwn_t wwpn)
+struct zfcp_port *zfcp_get_port_by_wwpn(struct zfcp_adapter *adapter,
+					wwn_t wwpn)
 {
 	struct zfcp_port *port;
-	int found = 0;
 
-	list_for_each_entry(port, &adapter->port_list_head, list) {
-		if ((port->wwpn == wwpn) &&
-		    !(atomic_read(&port->status) &
-		      (ZFCP_STATUS_PORT_NO_WWPN | ZFCP_STATUS_COMMON_REMOVE))) {
-			found = 1;
-			break;
-		}
-	}
-	return found ? port : NULL;
-}
-
-/**
- * zfcp_get_port_by_did - find port in port list of adapter by d_id
- * @adapter: pointer to adapter to search for port
- * @d_id: d_id to search for
- * Traverse list of all ports of an adapter and return pointer to a port
- * with the given d_id.
- */
-struct zfcp_port *
-zfcp_get_port_by_did(struct zfcp_adapter *adapter, u32 d_id)
-{
-	struct zfcp_port *port;
-	int found = 0;
-
-	list_for_each_entry(port, &adapter->port_list_head, list) {
-		if ((port->d_id == d_id) &&
-		    !atomic_test_mask(ZFCP_STATUS_COMMON_REMOVE, &port->status))
-		{
-			found = 1;
-			break;
-		}
-	}
-	return found ? port : NULL;
-}
-
-/**
- * zfcp_get_adapter_by_busid - find adpater in adapter list by bus_id
- * @bus_id: bus_id to search for
- * Traverse list of all adapters and return pointer to an adapter
- * with the given bus_id.
- */
-struct zfcp_adapter *
-zfcp_get_adapter_by_busid(char *bus_id)
-{
-	struct zfcp_adapter *adapter;
-	int found = 0;
-
-	list_for_each_entry(adapter, &zfcp_data.adapter_list_head, list) {
-		if ((strncmp(bus_id, zfcp_get_busid_by_adapter(adapter),
-			     BUS_ID_SIZE) == 0) &&
-		    !atomic_test_mask(ZFCP_STATUS_COMMON_REMOVE,
-				      &adapter->status)){
-			found = 1;
-			break;
-		}
-	}
-	return found ? adapter : NULL;
+	list_for_each_entry(port, &adapter->port_list_head, list)
+		if ((port->wwpn == wwpn) && !(atomic_read(&port->status) &
+		      (ZFCP_STATUS_PORT_NO_WWPN | ZFCP_STATUS_COMMON_REMOVE)))
+			return port;
+	return NULL;
 }
 
 /**
  * zfcp_unit_enqueue - enqueue unit to unit list of a port.
  * @port: pointer to port where unit is added
  * @fcp_lun: FCP LUN of unit to be enqueued
- * Return: pointer to enqueued unit on success, NULL on error
+ * Returns: pointer to enqueued unit on success, ERR_PTR on error
  * Locks: config_sema must be held to serialize changes to the unit list
  *
  * Sets up some unit internal structures and creates sysfs entry.
  */
-struct zfcp_unit *
-zfcp_unit_enqueue(struct zfcp_port *port, fcp_lun_t fcp_lun)
+struct zfcp_unit *zfcp_unit_enqueue(struct zfcp_port *port, fcp_lun_t fcp_lun)
 {
 	struct zfcp_unit *unit;
 
-	/*
-	 * check that there is no unit with this FCP_LUN already in list
-	 * and enqueue it.
-	 * Note: Unlike for the adapter and the port, this is an error
-	 */
-	read_lock_irq(&zfcp_data.config_lock);
-	unit = zfcp_get_unit_by_lun(port, fcp_lun);
-	read_unlock_irq(&zfcp_data.config_lock);
-	if (unit)
-		return NULL;
-
-	unit = kzalloc(sizeof (struct zfcp_unit), GFP_KERNEL);
+	unit = kzalloc(sizeof(struct zfcp_unit), GFP_KERNEL);
 	if (!unit)
-		return NULL;
+		return ERR_PTR(-ENOMEM);
 
-	/* initialise reference count stuff */
 	atomic_set(&unit->refcount, 0);
 	init_waitqueue_head(&unit->remove_wq);
 
 	unit->port = port;
 	unit->fcp_lun = fcp_lun;
 
-	/* setup for sysfs registration */
 	snprintf(unit->sysfs_device.bus_id, BUS_ID_SIZE, "0x%016llx", fcp_lun);
 	unit->sysfs_device.parent = &port->sysfs_device;
 	unit->sysfs_device.release = zfcp_sysfs_unit_release;
@@ -432,14 +291,19 @@ zfcp_unit_enqueue(struct zfcp_port *port
 	unit->latencies.cmd.channel.min = 0xFFFFFFFF;
 	unit->latencies.cmd.fabric.min = 0xFFFFFFFF;
 
-	if (device_register(&unit->sysfs_device)) {
-		kfree(unit);
-		return NULL;
+	read_lock_irq(&zfcp_data.config_lock);
+	if (zfcp_get_unit_by_lun(port, fcp_lun)) {
+		read_unlock_irq(&zfcp_data.config_lock);
+		goto err_out_free;
 	}
+	read_unlock_irq(&zfcp_data.config_lock);
+
+	if (device_register(&unit->sysfs_device))
+		goto err_out_free;
 
 	if (zfcp_sysfs_unit_create_files(&unit->sysfs_device)) {
 		device_unregister(&unit->sysfs_device);
-		return NULL;
+		return ERR_PTR(-EIO);
 	}
 
 	zfcp_unit_get(unit);
@@ -449,16 +313,27 @@ zfcp_unit_enqueue(struct zfcp_port *port
 	list_add_tail(&unit->list, &port->unit_list_head);
 	atomic_clear_mask(ZFCP_STATUS_COMMON_REMOVE, &unit->status);
 	atomic_set_mask(ZFCP_STATUS_COMMON_RUNNING, &unit->status);
+
 	write_unlock_irq(&zfcp_data.config_lock);
 
 	port->units++;
 	zfcp_port_get(port);
 
 	return unit;
+
+err_out_free:
+	kfree(unit);
+	return ERR_PTR(-EINVAL);
 }
 
-void
-zfcp_unit_dequeue(struct zfcp_unit *unit)
+/**
+ * zfcp_unit_dequeue - dequeue unit
+ * @unit: pointer to zfcp_unit
+ *
+ * waits until all work is done on unit and removes it then from the unit->list
+ * of the associated port.
+ */
+void zfcp_unit_dequeue(struct zfcp_unit *unit)
 {
 	zfcp_unit_wait(unit);
 	write_lock_irq(&zfcp_data.config_lock);
@@ -470,64 +345,48 @@ zfcp_unit_dequeue(struct zfcp_unit *unit
 	device_unregister(&unit->sysfs_device);
 }
 
-/*
- * Allocates a combined QTCB/fsf_req buffer for erp actions and fcp/SCSI
- * commands.
- * It also genrates fcp-nameserver request/response buffer and unsolicited
- * status read fsf_req buffers.
- *
- * locks:       must only be called with zfcp_data.config_sema taken
- */
-static int
-zfcp_allocate_low_mem_buffers(struct zfcp_adapter *adapter)
+
+static int zfcp_allocate_low_mem_buffers(struct zfcp_adapter *adapter)
 {
+	/* must only be called with zfcp_data.config_sema taken */
 	adapter->pool.fsf_req_erp =
-		mempool_create_slab_pool(ZFCP_POOL_FSF_REQ_ERP_NR,
-					 zfcp_data.fsf_req_qtcb_cache);
+		mempool_create_slab_pool(1, zfcp_data.fsf_req_qtcb_cache);
 	if (!adapter->pool.fsf_req_erp)
 		return -ENOMEM;
 
 	adapter->pool.fsf_req_scsi =
-		mempool_create_slab_pool(ZFCP_POOL_FSF_REQ_SCSI_NR,
-					 zfcp_data.fsf_req_qtcb_cache);
+		mempool_create_slab_pool(1, zfcp_data.fsf_req_qtcb_cache);
 	if (!adapter->pool.fsf_req_scsi)
 		return -ENOMEM;
 
 	adapter->pool.fsf_req_abort =
-		mempool_create_slab_pool(ZFCP_POOL_FSF_REQ_ABORT_NR,
-					 zfcp_data.fsf_req_qtcb_cache);
+		mempool_create_slab_pool(1, zfcp_data.fsf_req_qtcb_cache);
 	if (!adapter->pool.fsf_req_abort)
 		return -ENOMEM;
 
 	adapter->pool.fsf_req_status_read =
-		mempool_create_kmalloc_pool(ZFCP_POOL_STATUS_READ_NR,
+		mempool_create_kmalloc_pool(FSF_STATUS_READS_RECOM,
 					    sizeof(struct zfcp_fsf_req));
 	if (!adapter->pool.fsf_req_status_read)
 		return -ENOMEM;
 
 	adapter->pool.data_status_read =
-		mempool_create_slab_pool(ZFCP_POOL_STATUS_READ_NR,
+		mempool_create_slab_pool(FSF_STATUS_READS_RECOM,
 					 zfcp_data.sr_buffer_cache);
 	if (!adapter->pool.data_status_read)
 		return -ENOMEM;
 
 	adapter->pool.data_gid_pn =
-		mempool_create_slab_pool(ZFCP_POOL_DATA_GID_PN_NR,
-					 zfcp_data.gid_pn_cache);
+		mempool_create_slab_pool(1, zfcp_data.gid_pn_cache);
 	if (!adapter->pool.data_gid_pn)
 		return -ENOMEM;
 
 	return 0;
 }
 
-/**
- * zfcp_free_low_mem_buffers - free memory pools of an adapter
- * @adapter: pointer to zfcp_adapter for which memory pools should be freed
- * locking:  zfcp_data.config_sema must be held
- */
-static void
-zfcp_free_low_mem_buffers(struct zfcp_adapter *adapter)
+static void zfcp_free_low_mem_buffers(struct zfcp_adapter *adapter)
 {
+	/* zfcp_data.config_sema must be held */
 	if (adapter->pool.fsf_req_erp)
 		mempool_destroy(adapter->pool.fsf_req_erp);
 	if (adapter->pool.fsf_req_scsi)
@@ -547,6 +406,15 @@ static void zfcp_dummy_release(struct de
 	return;
 }
 
+/**
+ * zfcp_status_read_refill - refill the long running status_read_requests
+ * @adapter: ptr to struct zfcp_adapter for which the buffers should be refilled
+ *
+ * Returns: 0 on success, 1 otherwise
+ *
+ * if there are 16 or more status_read requests missing an adapter_reopen
+ * is triggered
+ */
 int zfcp_status_read_refill(struct zfcp_adapter *adapter)
 {
 	while (atomic_read(&adapter->stat_miss) > 0)
@@ -573,27 +441,25 @@ static int zfcp_nameserver_enqueue(struc
 
 	port = zfcp_port_enqueue(adapter, 0, ZFCP_STATUS_PORT_WKA,
 				 ZFCP_DID_DIRECTORY_SERVICE);
-	if (!port)
-		return -ENXIO;
+	if (IS_ERR(port))
+		return PTR_ERR(port);
 	zfcp_port_put(port);
 
 	return 0;
 }
 
-/*
+/**
+ * zfcp_adapter_enqueue - enqueue a new adapter to the list
+ * @ccw_device: pointer to the struct cc_device
+ *
+ * Returns:	0             if a new adapter was successfully enqueued
+ *		-ENOMEM       if alloc failed
  * Enqueues an adapter at the end of the adapter list in the driver data.
  * All adapter internal structures are set up.
  * Proc-fs entries are also created.
- *
- * FIXME: Use -ENOMEM as return code for allocation failures
- *
- * returns:	0             if a new adapter was successfully enqueued
- *              ZFCP_KNOWN    if an adapter with this devno was already present
- *		-ENOMEM       if alloc failed
  * locks:	config_sema must be held to serialise changes to the adapter list
  */
-struct zfcp_adapter *
-zfcp_adapter_enqueue(struct ccw_device *ccw_device)
+int zfcp_adapter_enqueue(struct ccw_device *ccw_device)
 {
 	struct zfcp_adapter *adapter;
 
@@ -602,15 +468,13 @@ zfcp_adapter_enqueue(struct ccw_device *
 	 * are protected by the config_sema, which must be held to get here
 	 */
 
-	/* try to allocate new adapter data structure (zeroed) */
-	adapter = kzalloc(sizeof (struct zfcp_adapter), GFP_KERNEL);
+	adapter = kzalloc(sizeof(struct zfcp_adapter), GFP_KERNEL);
 	if (!adapter)
-		goto out;
+		return -ENOMEM;
 
 	ccw_device->handler = NULL;
-
-	/* save ccw_device pointer */
 	adapter->ccw_device = ccw_device;
+	atomic_set(&adapter->refcount, 0);
 
 	if (zfcp_qdio_allocate(adapter))
 		goto qdio_allocate_failed;
@@ -618,47 +482,34 @@ zfcp_adapter_enqueue(struct ccw_device *
 	if (zfcp_allocate_low_mem_buffers(adapter))
 		goto failed_low_mem_buffers;
 
-	/* initialise reference count stuff */
-	atomic_set(&adapter->refcount, 0);
+	if (zfcp_reqlist_alloc(adapter))
+		goto failed_low_mem_buffers;
+
+	if (zfcp_adapter_debug_register(adapter))
+		goto debug_register_failed;
+
 	init_waitqueue_head(&adapter->remove_wq);
+	init_waitqueue_head(&adapter->erp_thread_wqh);
+	init_waitqueue_head(&adapter->erp_done_wqh);
 
-	/* initialise list of ports */
 	INIT_LIST_HEAD(&adapter->port_list_head);
-
-	/* initialise list of ports to be removed */
 	INIT_LIST_HEAD(&adapter->port_remove_lh);
+	INIT_LIST_HEAD(&adapter->erp_ready_head);
+	INIT_LIST_HEAD(&adapter->erp_running_head);
 
-	/* initialize list of fsf requests */
 	spin_lock_init(&adapter->req_list_lock);
-	if (zfcp_reqlist_alloc(adapter))
-		goto failed_low_mem_buffers;
-
-	/* initialize debug locks */
 
 	spin_lock_init(&adapter->hba_dbf_lock);
 	spin_lock_init(&adapter->san_dbf_lock);
 	spin_lock_init(&adapter->scsi_dbf_lock);
 	spin_lock_init(&adapter->rec_dbf_lock);
 
-	if (zfcp_adapter_debug_register(adapter))
-		goto debug_register_failed;
-
-	/* initialize error recovery stuff */
-
 	rwlock_init(&adapter->erp_lock);
-	sema_init(&adapter->erp_ready_sem, 0);
-	INIT_LIST_HEAD(&adapter->erp_ready_head);
-	INIT_LIST_HEAD(&adapter->erp_running_head);
-
-	/* initialize abort lock */
 	rwlock_init(&adapter->abort_lock);
+	rwlock_init(&adapter->req_q.lock);
 
-	/* initialise some erp stuff */
-	init_waitqueue_head(&adapter->erp_thread_wqh);
-	init_waitqueue_head(&adapter->erp_done_wqh);
+	sema_init(&adapter->erp_ready_sem, 0);
 
-	/* initialize lock of associated request queue */
-	rwlock_init(&adapter->req_q.lock);
 	INIT_WORK(&adapter->stat_work, _zfcp_status_read_scheduler);
 	INIT_WORK(&adapter->scan_work, _zfcp_scan_ports_later);
 
@@ -678,7 +529,6 @@ zfcp_adapter_enqueue(struct ccw_device *
 	if (device_register(&adapter->generic_services))
 		goto generic_services_failed;
 
-	/* put allocated adapter at list tail */
 	write_lock_irq(&zfcp_data.config_lock);
 	atomic_clear_mask(ZFCP_STATUS_COMMON_REMOVE, &adapter->status);
 	list_add_tail(&adapter->list, &zfcp_data.adapter_list_head);
@@ -688,33 +538,29 @@ zfcp_adapter_enqueue(struct ccw_device *
 
 	zfcp_nameserver_enqueue(adapter);
 
-	goto out;
+	return 0;
 
- generic_services_failed:
+generic_services_failed:
 	zfcp_sysfs_adapter_remove_files(&adapter->ccw_device->dev);
- sysfs_failed:
+sysfs_failed:
 	zfcp_adapter_debug_unregister(adapter);
- debug_register_failed:
+debug_register_failed:
 	dev_set_drvdata(&ccw_device->dev, NULL);
-	zfcp_reqlist_free(adapter);
- failed_low_mem_buffers:
+	kfree(adapter->req_list);
+failed_low_mem_buffers:
 	zfcp_free_low_mem_buffers(adapter);
- qdio_allocate_failed:
+qdio_allocate_failed:
 	zfcp_qdio_free(adapter);
 	kfree(adapter);
-	adapter = NULL;
- out:
-	return adapter;
+	return -ENOMEM;
 }
 
-/*
- * returns:	0 - struct zfcp_adapter  data structure successfully removed
- *		!0 - struct zfcp_adapter  data structure could not be removed
- *			(e.g. still used)
+/**
+ * zfcp_adapter_dequeue - remove the adapter from the resource list
+ * @adapter: pointer to struct zfcp_adapter which should be removed
  * locks:	adapter list write lock is assumed to be held by caller
  */
-void
-zfcp_adapter_dequeue(struct zfcp_adapter *adapter)
+void zfcp_adapter_dequeue(struct zfcp_adapter *adapter)
 {
 	int retval = 0;
 	unsigned long flags;
@@ -729,10 +575,8 @@ zfcp_adapter_dequeue(struct zfcp_adapter
 	spin_lock_irqsave(&adapter->req_list_lock, flags);
 	retval = zfcp_reqlist_isempty(adapter);
 	spin_unlock_irqrestore(&adapter->req_list_lock, flags);
-	if (!retval) {
-		retval = -EBUSY;
-		goto out;
-	}
+	if (!retval)
+		return;
 
 	zfcp_adapter_debug_unregister(adapter);
 
@@ -747,12 +591,10 @@ zfcp_adapter_dequeue(struct zfcp_adapter
 	zfcp_qdio_free(adapter);
 
 	zfcp_free_low_mem_buffers(adapter);
-	zfcp_reqlist_free(adapter);
+	kfree(adapter->req_list);
 	kfree(adapter->fc_stats);
 	kfree(adapter->stats_reset_data);
 	kfree(adapter);
- out:
-	return;
 }
 
 /**
@@ -761,77 +603,58 @@ zfcp_adapter_dequeue(struct zfcp_adapter
  * @wwpn: WWPN of the remote port to be enqueued
  * @status: initial status for the port
  * @d_id: destination id of the remote port to be enqueued
- * Return: pointer to enqueued port on success, NULL on error
+ * Returns: pointer to enqueued port on success, ERR_PTR on error
  * Locks: config_sema must be held to serialize changes to the port list
  *
  * All port internal structures are set up and the sysfs entry is generated.
  * d_id is used to enqueue ports with a well known address like the Directory
  * Service for nameserver lookup.
  */
-struct zfcp_port *
-zfcp_port_enqueue(struct zfcp_adapter *adapter, wwn_t wwpn, u32 status,
-		  u32 d_id)
+struct zfcp_port *zfcp_port_enqueue(struct zfcp_adapter *adapter, wwn_t wwpn,
+				     u32 status, u32 d_id)
 {
 	struct zfcp_port *port;
-	int check_wwpn;
+	char *bus_id;
 
-	check_wwpn = !(status & ZFCP_STATUS_PORT_NO_WWPN);
-	/*
-	 * check that there is no port with this WWPN already in list
-	 */
-	if (check_wwpn) {
-		read_lock_irq(&zfcp_data.config_lock);
-		port = zfcp_get_port_by_wwpn(adapter, wwpn);
-		read_unlock_irq(&zfcp_data.config_lock);
-		if (port)
-			return NULL;
-	}
-
-	port = kzalloc(sizeof (struct zfcp_port), GFP_KERNEL);
+	port = kzalloc(sizeof(struct zfcp_port), GFP_KERNEL);
 	if (!port)
-		return NULL;
+		return ERR_PTR(-ENOMEM);
 
-	/* initialise reference count stuff */
-	atomic_set(&port->refcount, 0);
 	init_waitqueue_head(&port->remove_wq);
 
 	INIT_LIST_HEAD(&port->unit_list_head);
 	INIT_LIST_HEAD(&port->unit_remove_lh);
 
 	port->adapter = adapter;
+	port->d_id = d_id;
+	port->wwpn = wwpn;
 
-	if (check_wwpn)
-		port->wwpn = wwpn;
-
-	atomic_set_mask(status, &port->status);
+	/* mark port unusable as long as sysfs registration is not complete */
+	atomic_set_mask(status | ZFCP_STATUS_COMMON_REMOVE, &port->status);
+	atomic_set(&port->refcount, 0);
 
-	/* setup for sysfs registration */
 	if (status & ZFCP_STATUS_PORT_WKA) {
 		switch (d_id) {
 		case ZFCP_DID_DIRECTORY_SERVICE:
-			snprintf(port->sysfs_device.bus_id, BUS_ID_SIZE,
-				 "directory");
+			bus_id = "directory";
 			break;
 		case ZFCP_DID_MANAGEMENT_SERVICE:
-			snprintf(port->sysfs_device.bus_id, BUS_ID_SIZE,
-				 "management");
+			bus_id = "management";
 			break;
 		case ZFCP_DID_KEY_DISTRIBUTION_SERVICE:
-			snprintf(port->sysfs_device.bus_id, BUS_ID_SIZE,
-				 "key_distribution");
+			bus_id = "key_distribution";
 			break;
 		case ZFCP_DID_ALIAS_SERVICE:
-			snprintf(port->sysfs_device.bus_id, BUS_ID_SIZE,
-				 "alias");
+			bus_id = "alias";
 			break;
 		case ZFCP_DID_TIME_SERVICE:
-			snprintf(port->sysfs_device.bus_id, BUS_ID_SIZE,
-				 "time");
+			bus_id = "time";
 			break;
 		default:
 			kfree(port);
-			return NULL;
+			return ERR_PTR(-EINVAL);
 		}
+		snprintf(port->sysfs_device.bus_id, BUS_ID_SIZE, "%s", bus_id);
 		port->sysfs_device.parent = &adapter->generic_services;
 	} else {
 		snprintf(port->sysfs_device.bus_id,
@@ -839,22 +662,23 @@ zfcp_port_enqueue(struct zfcp_adapter *a
 		port->sysfs_device.parent = &adapter->ccw_device->dev;
 	}
 
-	port->d_id = d_id;
-
 	port->sysfs_device.release = zfcp_sysfs_port_release;
 	dev_set_drvdata(&port->sysfs_device, port);
 
-	/* mark port unusable as long as sysfs registration is not complete */
-	atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE, &port->status);
+	read_lock_irq(&zfcp_data.config_lock);
+	if (!(status & ZFCP_STATUS_PORT_NO_WWPN))
+		if (zfcp_get_port_by_wwpn(adapter, wwpn)) {
+			read_unlock_irq(&zfcp_data.config_lock);
+			goto err_out_free;
+		}
+	read_unlock_irq(&zfcp_data.config_lock);
 
-	if (device_register(&port->sysfs_device)) {
-		kfree(port);
-		return NULL;
-	}
+	if (device_register(&port->sysfs_device))
+		goto err_out_free;
 
 	if (zfcp_sysfs_port_create_files(&port->sysfs_device, status)) {
 		device_unregister(&port->sysfs_device);
-		return NULL;
+		goto err_out;
 	}
 
 	zfcp_port_get(port);
@@ -867,15 +691,23 @@ zfcp_port_enqueue(struct zfcp_adapter *a
 		if (!adapter->nameserver_port)
 			adapter->nameserver_port = port;
 	adapter->ports++;
+
 	write_unlock_irq(&zfcp_data.config_lock);
 
 	zfcp_adapter_get(adapter);
-
 	return port;
+
+err_out_free:
+	kfree(port);
+err_out:
+	return ERR_PTR(-EINVAL);
 }
 
-void
-zfcp_port_dequeue(struct zfcp_port *port)
+/**
+ * zfcp_port_dequeue - dequeues a port from the port list of the adapter
+ * @port: pointer to struct zfcp_port which should be removed
+ */
+void zfcp_port_dequeue(struct zfcp_port *port)
 {
 	zfcp_port_wait(port);
 	write_lock_irq(&zfcp_data.config_lock);
@@ -891,6 +723,12 @@ zfcp_port_dequeue(struct zfcp_port *port
 	device_unregister(&port->sysfs_device);
 }
 
+/**
+ * zfcp_sg_free_table - free memory used by scatterlists
+ * @sg: pointer to scatterlist
+ * @count: number of scatterlist which are to be free'ed
+ * the scatterlist are expected to reference pages always
+ */
 void zfcp_sg_free_table(struct scatterlist *sg, int count)
 {
 	int i;
@@ -902,6 +740,14 @@ void zfcp_sg_free_table(struct scatterli
 			break;
 }
 
+/**
+ * zfcp_sg_setup_table - init scatterlist and allocate, assign buffers
+ * @sg: pointer to struct scatterlist
+ * @count: number of scatterlists which should be assigned with buffers
+ * of size page
+ *
+ * Returns: 0 on success, -ENOMEM otherwise
+ */
 int zfcp_sg_setup_table(struct scatterlist *sg, int count)
 {
 	void *addr;
--- a/drivers/s390/scsi/zfcp_def.h	2008-06-30 12:32:40.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_def.h	2008-06-30 12:37:00.000000000 +0200
@@ -730,13 +730,6 @@ struct zfcp_data {
 	struct kmem_cache		*gid_pn_cache;
 };
 
-/* number of elements for various memory pools */
-#define ZFCP_POOL_FSF_REQ_ERP_NR	1
-#define ZFCP_POOL_FSF_REQ_SCSI_NR	1
-#define ZFCP_POOL_FSF_REQ_ABORT_NR	1
-#define ZFCP_POOL_STATUS_READ_NR	FSF_STATUS_READS_RECOM
-#define ZFCP_POOL_DATA_GID_PN_NR	1
-
 /* struct used by memory pools for fsf_requests */
 struct zfcp_fsf_req_qtcb {
 	struct zfcp_fsf_req fsf_req;
@@ -757,12 +750,6 @@ struct zfcp_fsf_req_qtcb {
            ((atomic_read(target) & mask) == mask)
 #endif
 
-extern void _zfcp_hex_dump(char *, int);
-#define ZFCP_HEX_DUMP(level, addr, count) \
-		if (ZFCP_LOG_CHECK(level)) { \
-			_zfcp_hex_dump(addr, count); \
-		}
-
 #define zfcp_get_busid_by_adapter(adapter) (adapter->ccw_device->dev.bus_id)
 #define zfcp_get_busid_by_port(port) (zfcp_get_busid_by_adapter(port->adapter))
 #define zfcp_get_busid_by_unit(unit) (zfcp_get_busid_by_port(unit->port))
--- a/drivers/s390/scsi/zfcp_sysfs_port.c	2008-06-30 12:32:37.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_sysfs_port.c	2008-06-30 12:37:00.000000000 +0200
@@ -74,7 +74,7 @@ zfcp_sysfs_unit_add_store(struct device 
 		goto out;
 
 	unit = zfcp_unit_enqueue(port, fcp_lun);
-	if (!unit)
+	if (IS_ERR(unit))
 		goto out;
 
 	retval = 0;
--- a/drivers/s390/scsi/zfcp_ccw.c	2008-06-30 12:32:37.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_ccw.c	2008-06-30 12:32:40.000000000 +0200
@@ -20,12 +20,10 @@
  */
 static int zfcp_ccw_probe(struct ccw_device *ccw_device)
 {
-	struct zfcp_adapter *adapter;
 	int retval = 0;
 
 	down(&zfcp_data.config_sema);
-	adapter = zfcp_adapter_enqueue(ccw_device);
-	if (!adapter) {
+	if (zfcp_adapter_enqueue(ccw_device)) {
 		dev_err(&ccw_device->dev,
 			"Setup of data structures failed.\n");
 		retval = -EINVAL;
--- a/drivers/s390/scsi/zfcp_ext.h	2008-06-30 12:32:40.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_ext.h	2008-06-30 12:37:00.000000000 +0200
@@ -26,9 +26,7 @@ extern void zfcp_sysfs_unit_release(stru
 /**************************** CONFIGURATION  *********************************/
 extern struct zfcp_unit *zfcp_get_unit_by_lun(struct zfcp_port *, fcp_lun_t);
 extern struct zfcp_port *zfcp_get_port_by_wwpn(struct zfcp_adapter *, wwn_t);
-extern struct zfcp_port *zfcp_get_port_by_did(struct zfcp_adapter *, u32);
-struct zfcp_adapter *zfcp_get_adapter_by_busid(char *);
-extern struct zfcp_adapter *zfcp_adapter_enqueue(struct ccw_device *);
+extern int    zfcp_adapter_enqueue(struct ccw_device *);
 extern int    zfcp_adapter_debug_register(struct zfcp_adapter *);
 extern void   zfcp_adapter_dequeue(struct zfcp_adapter *);
 extern void   zfcp_adapter_debug_unregister(struct zfcp_adapter *);
--- a/drivers/s390/scsi/zfcp_erp.c	2008-06-30 12:32:37.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_erp.c	2008-06-30 12:37:00.000000000 +0200
@@ -1675,7 +1675,7 @@ static void zfcp_erp_open_ptp_port(struc
 	struct zfcp_port *port;
 	port = zfcp_port_enqueue(adapter, adapter->peer_wwpn, 0,
 				 adapter->peer_d_id);
-	if (!port) /* error or port already attached */
+	if (IS_ERR(port)) /* error or port already attached */
 		return;
 	zfcp_erp_port_reopen_internal(port, 0, 150, NULL);
 }
--- a/drivers/s390/scsi/zfcp_fc.c	2008-06-30 12:32:40.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_fc.c	2008-06-30 12:37:00.000000000 +0200
@@ -39,6 +39,18 @@ struct zfcp_gpn_ft {
 	struct scatterlist sg_resp[ZFCP_GPN_FT_BUFFERS];
 };
 
+static struct zfcp_port *zfcp_get_port_by_did(struct zfcp_adapter *adapter,
+					      u32 d_id)
+{
+	struct zfcp_port *port;
+
+	list_for_each_entry(port, &adapter->port_list_head, list)
+		if ((port->d_id == d_id) &&
+		    !atomic_test_mask(ZFCP_STATUS_COMMON_REMOVE, &port->status))
+			return port;
+	return NULL;
+}
+
 static void _zfcp_fc_incoming_rscn(struct zfcp_fsf_req *fsf_req, u32 range,
 				   struct fcp_rscn_element *elem)
 {
@@ -496,10 +508,10 @@ static int zfcp_scan_eval_gpn_ft(struct 
 		port = zfcp_port_enqueue(adapter, acc->wwpn,
 					 ZFCP_STATUS_PORT_DID_DID |
 					 ZFCP_STATUS_COMMON_NOESC, d_id);
-		if (port)
-			zfcp_erp_port_reopen(port, 0, 149, NULL);
+		if (IS_ERR(port))
+			ret = PTR_ERR(port);
 		else
-			ret = -ENOMEM;
+			zfcp_erp_port_reopen(port, 0, 149, NULL);
 		if (acc->control & 0x80) /* last entry */
 			break;
 	}

-- 

Re: [patch 07/11] zfcp: Cleanup of code in zfcp_aux.c

[Heiko Carstens]

> +static int __init zfcp_device_setup(char *devstr)
>  {
> -	char *tmp, *str;
> -	size_t len;
> +	char *token;
> 
>  	if (!devstr)
>  		return 0;
> 
> -	len = strlen(devstr) + 1;
> -	str = kmalloc(len, GFP_KERNEL);
> -	if (!str) {
> -		pr_err("zfcp: Could not allocate memory for "
> -		       "device parameter string, device not attached.\n");
> -		return 0;
> -	}
> -	memcpy(str, devstr, len);
> -
> -	tmp = strchr(str, ',');
> -	if (!tmp)
> +	token = strsep(&devstr, ",");
> +	if (!token || strlen(token) >= BUS_ID_SIZE)
>  		goto err_out;
> -	*tmp++ = '\0';
> -	strncpy(zfcp_data.init_busid, str, BUS_ID_SIZE);
> -	zfcp_data.init_busid[BUS_ID_SIZE-1] = '\0';
> +	strncpy(zfcp_data.init_busid, token, BUS_ID_SIZE);
> 
> -	zfcp_data.init_wwpn = simple_strtoull(tmp, &tmp, 0);
> -	if (*tmp++ != ',')
> -		goto err_out;
> -	if (*tmp == '\0')
> +	token = strsep(&devstr, ",");
> +	if (!token || strict_strtoull(token, 0, &zfcp_data.init_wwpn))
>  		goto err_out;
> 
> -	zfcp_data.init_fcp_lun = simple_strtoull(tmp, &tmp, 0);
> -	if (*tmp != '\0')
> +	token = strsep(&devstr, ",");
> +	if (!token || strict_strtoull(token, 0, &zfcp_data.init_fcp_lun))
>  		goto err_out;
> -	kfree(str);
>  	return 1;
> 
>   err_out:
>  	pr_err("zfcp: Parse error for device parameter string %s, "
> -	       "device not attached.\n", str);
> -	kfree(str);
> +	       "device not attached.\n", devstr);
>  	return 0;
>  }

Sorry, but this still seems to be incorrect. strsep modifies the string that
gets passed to it. In this case you let it operate on the original module
parameter string which is also exported via sysfs.
So after parsing finished the exported string is much shorter than the
original string. That was actually the whole point why the old code allocated
memory and copied the string so the copy could be modified.
A comment would have been good ;)

Re: [patch 07/11] zfcp: Cleanup of code in zfcp_aux.c

[Swen Schillig]

On Tuesday 01 July 2008 00:52, Heiko Carstens wrote:
> > +static int __init zfcp_device_setup(char *devstr)
> >  {
> > -	char *tmp, *str;
> > -	size_t len;
> > +	char *token;
> > 
> >  	if (!devstr)
> >  		return 0;
> > 
> > -	len = strlen(devstr) + 1;
> > -	str = kmalloc(len, GFP_KERNEL);
> > -	if (!str) {
> > -		pr_err("zfcp: Could not allocate memory for "
> > -		       "device parameter string, device not attached.\n");
> > -		return 0;
> > -	}
> > -	memcpy(str, devstr, len);
> > -
> > -	tmp = strchr(str, ',');
> > -	if (!tmp)
> > +	token = strsep(&devstr, ",");
> > +	if (!token || strlen(token) >= BUS_ID_SIZE)
> >  		goto err_out;
> > -	*tmp++ = '\0';
> > -	strncpy(zfcp_data.init_busid, str, BUS_ID_SIZE);
> > -	zfcp_data.init_busid[BUS_ID_SIZE-1] = '\0';
> > +	strncpy(zfcp_data.init_busid, token, BUS_ID_SIZE);
> > 
> > -	zfcp_data.init_wwpn = simple_strtoull(tmp, &tmp, 0);
> > -	if (*tmp++ != ',')
> > -		goto err_out;
> > -	if (*tmp == '\0')
> > +	token = strsep(&devstr, ",");
> > +	if (!token || strict_strtoull(token, 0, &zfcp_data.init_wwpn))
> >  		goto err_out;
> > 
> > -	zfcp_data.init_fcp_lun = simple_strtoull(tmp, &tmp, 0);
> > -	if (*tmp != '\0')
> > +	token = strsep(&devstr, ",");
> > +	if (!token || strict_strtoull(token, 0, &zfcp_data.init_fcp_lun))
> >  		goto err_out;
> > -	kfree(str);
> >  	return 1;
> > 
> >   err_out:
> >  	pr_err("zfcp: Parse error for device parameter string %s, "
> > -	       "device not attached.\n", str);
> > -	kfree(str);
> > +	       "device not attached.\n", devstr);
> >  	return 0;
> >  }
> 
> Sorry, but this still seems to be incorrect. strsep modifies the string that
> gets passed to it. In this case you let it operate on the original module
> parameter string which is also exported via sysfs.
> So after parsing finished the exported string is much shorter than the
> original string. That was actually the whole point why the old code allocated
> memory and copied the string so the copy could be modified.
> A comment would have been good ;)
> --
Correct,

I fixed the patch and Christof will send it soon to the list.

Cheers Swen

Re: [patch 07/11] zfcp: Cleanup of code in zfcp_aux.c

[Christof Schmitt]

On Tue, Jul 01, 2008 at 03:44:13PM +0200, Swen Schillig wrote:
> > Sorry, but this still seems to be incorrect. strsep modifies the string that
> > gets passed to it. In this case you let it operate on the original module
> > parameter string which is also exported via sysfs.
> > So after parsing finished the exported string is much shorter than the
> > original string. That was actually the whole point why the old code allocated
> > memory and copied the string so the copy could be modified.
> > A comment would have been good ;)
> > --
> Correct,
> 
> I fixed the patch and Christof will send it soon to the list.

While testing this, i also fixed one issue with the erp patch. To
avoid confusion, i will resend the complete patch series later today.

Christof

[patch 08/11] zfcp: consolidate sysfs things into one file.

[christof.schmitt]

[-- Attachment #1: sysfs-cleanup.diff --]
[-- Type: text/plain, Size: 51225 bytes --]

From: Swen Schillig <swen@vnet.ibm.com>

zfcp was using three files to deal with sysfs representation
for adapters, ports and units. The consolidation into one file
prevents code-duplication and eases maintainability.

Signed-off-by: Swen Schillig <swen@vnet.ibm.com>
Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com>
---
 drivers/s390/scsi/Makefile             |    3 
 drivers/s390/scsi/zfcp_aux.c           |   42 ++
 drivers/s390/scsi/zfcp_def.h           |    9 
 drivers/s390/scsi/zfcp_ext.h           |   16 -
 drivers/s390/scsi/zfcp_scsi.c          |  206 -------------
 drivers/s390/scsi/zfcp_sysfs.c         |  496 +++++++++++++++++++++++++++++++++
 drivers/s390/scsi/zfcp_sysfs_adapter.c |  232 ---------------
 drivers/s390/scsi/zfcp_sysfs_port.c    |  278 ------------------
 drivers/s390/scsi/zfcp_sysfs_unit.c    |  150 ---------
 9 files changed, 539 insertions(+), 893 deletions(-)

--- a/drivers/s390/scsi/zfcp_def.h	2008-06-30 11:27:42.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_def.h	2008-06-30 11:27:59.000000000 +0200
@@ -627,11 +627,6 @@ struct zfcp_adapter {
 	struct work_struct	scan_work;
 };
 
-/*
- * the struct device sysfs_device must be at the beginning of this structure.
- * pointer to struct device is used to free port structure in release function
- * of the device. don't change!
- */
 struct zfcp_port {
 	struct device          sysfs_device;   /* sysfs device */
 	struct fc_rport        *rport;         /* rport of fc transport class */
@@ -655,10 +650,6 @@ struct zfcp_port {
 	u32                    supported_classes;
 };
 
-/* the struct device sysfs_device must be at the beginning of this structure.
- * pointer to struct device is used to free unit structure in release function
- * of the device. don't change!
- */
 struct zfcp_unit {
 	struct device          sysfs_device;   /* sysfs device */
 	struct list_head       list;	       /* list of logical units */
--- a/drivers/s390/scsi/zfcp_sysfs_port.c	2008-06-30 11:27:42.000000000 +0200
+++ /dev/null	1970-01-01 00:00:00.000000000 +0000
@@ -1,278 +0,0 @@
-/*
- * zfcp device driver
- *
- * sysfs attributes for zfcp port.
- *
- * Copyright IBM Corporation 2002, 2008
- */
-
-#include "zfcp_ext.h"
-
-/**
- * zfcp_sysfs_port_release - gets called when a struct device port is released
- * @dev: pointer to belonging device
- */
-void
-zfcp_sysfs_port_release(struct device *dev)
-{
-	kfree(dev);
-}
-
-/**
- * ZFCP_DEFINE_PORT_ATTR
- * @_name:   name of show attribute
- * @_format: format string
- * @_value:  value to print
- *
- * Generates attributes for a port.
- */
-#define ZFCP_DEFINE_PORT_ATTR(_name, _format, _value)                    \
-static ssize_t zfcp_sysfs_port_##_name##_show(struct device *dev, struct device_attribute *attr,        \
-                                              char *buf)                 \
-{                                                                        \
-        struct zfcp_port *port;                                          \
-                                                                         \
-        port = dev_get_drvdata(dev);                                     \
-        return sprintf(buf, _format, _value);                            \
-}                                                                        \
-                                                                         \
-static DEVICE_ATTR(_name, S_IRUGO, zfcp_sysfs_port_##_name##_show, NULL);
-
-ZFCP_DEFINE_PORT_ATTR(status, "0x%08x\n", atomic_read(&port->status));
-ZFCP_DEFINE_PORT_ATTR(in_recovery, "%d\n", atomic_test_mask
-		      (ZFCP_STATUS_COMMON_ERP_INUSE, &port->status));
-ZFCP_DEFINE_PORT_ATTR(access_denied, "%d\n", atomic_test_mask
-		      (ZFCP_STATUS_COMMON_ACCESS_DENIED, &port->status));
-
-/**
- * zfcp_sysfs_unit_add_store - add a unit to sysfs tree
- * @dev: pointer to belonging device
- * @buf: pointer to input buffer
- * @count: number of bytes in buffer
- *
- * Store function of the "unit_add" attribute of a port.
- */
-static ssize_t
-zfcp_sysfs_unit_add_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
-{
-	fcp_lun_t fcp_lun;
-	char *endp;
-	struct zfcp_port *port;
-	struct zfcp_unit *unit;
-	int retval = -EINVAL;
-
-	down(&zfcp_data.config_sema);
-
-	port = dev_get_drvdata(dev);
-	if (atomic_test_mask(ZFCP_STATUS_COMMON_REMOVE, &port->status)) {
-		retval = -EBUSY;
-		goto out;
-	}
-
-	fcp_lun = simple_strtoull(buf, &endp, 0);
-	if ((endp + 1) < (buf + count))
-		goto out;
-
-	unit = zfcp_unit_enqueue(port, fcp_lun);
-	if (IS_ERR(unit))
-		goto out;
-
-	retval = 0;
-
-	zfcp_erp_unit_reopen(unit, 0, 94, NULL);
-	zfcp_erp_wait(unit->port->adapter);
-	zfcp_unit_put(unit);
- out:
-	up(&zfcp_data.config_sema);
-	return retval ? retval : (ssize_t) count;
-}
-
-static DEVICE_ATTR(unit_add, S_IWUSR, NULL, zfcp_sysfs_unit_add_store);
-
-/**
- * zfcp_sysfs_unit_remove_store - remove a unit from sysfs tree
- * @dev: pointer to belonging device
- * @buf: pointer to input buffer
- * @count: number of bytes in buffer
- */
-static ssize_t
-zfcp_sysfs_unit_remove_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
-{
-	struct zfcp_port *port;
-	struct zfcp_unit *unit;
-	fcp_lun_t fcp_lun;
-	char *endp;
-	int retval = 0;
-
-	down(&zfcp_data.config_sema);
-
-	port = dev_get_drvdata(dev);
-	if (atomic_test_mask(ZFCP_STATUS_COMMON_REMOVE, &port->status)) {
-		retval = -EBUSY;
-		goto out;
-	}
-
-	fcp_lun = simple_strtoull(buf, &endp, 0);
-	if ((endp + 1) < (buf + count)) {
-		retval = -EINVAL;
-		goto out;
-	}
-
-	write_lock_irq(&zfcp_data.config_lock);
-	unit = zfcp_get_unit_by_lun(port, fcp_lun);
-	if (unit && (atomic_read(&unit->refcount) == 0)) {
-		zfcp_unit_get(unit);
-		atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE, &unit->status);
-		list_move(&unit->list, &port->unit_remove_lh);
-	}
-	else {
-		unit = NULL;
-	}
-	write_unlock_irq(&zfcp_data.config_lock);
-
-	if (!unit) {
-		retval = -ENXIO;
-		goto out;
-	}
-
-	zfcp_erp_unit_shutdown(unit, 0, 95, NULL);
-	zfcp_erp_wait(unit->port->adapter);
-	zfcp_unit_put(unit);
-	zfcp_unit_dequeue(unit);
- out:
-	up(&zfcp_data.config_sema);
-	return retval ? retval : (ssize_t) count;
-}
-
-static DEVICE_ATTR(unit_remove, S_IWUSR, NULL, zfcp_sysfs_unit_remove_store);
-
-/**
- * zfcp_sysfs_port_failed_store - failed state of port
- * @dev: pointer to belonging device
- * @buf: pointer to input buffer
- * @count: number of bytes in buffer
- *
- * Store function of the "failed" attribute of a port.
- * If a "0" gets written to "failed", error recovery will be
- * started for the belonging port.
- */
-static ssize_t
-zfcp_sysfs_port_failed_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
-{
-	struct zfcp_port *port;
-	unsigned int val;
-	char *endp;
-	int retval = 0;
-
-	down(&zfcp_data.config_sema);
-
-	port = dev_get_drvdata(dev);
-	if (atomic_test_mask(ZFCP_STATUS_COMMON_REMOVE, &port->status)) {
-		retval = -EBUSY;
-		goto out;
-	}
-
-	val = simple_strtoul(buf, &endp, 0);
-	if (((endp + 1) < (buf + count)) || (val != 0)) {
-		retval = -EINVAL;
-		goto out;
-	}
-
-	zfcp_erp_modify_port_status(port, 45, NULL,
-				    ZFCP_STATUS_COMMON_RUNNING, ZFCP_SET);
-	zfcp_erp_port_reopen(port, ZFCP_STATUS_COMMON_ERP_FAILED, 96, NULL);
-	zfcp_erp_wait(port->adapter);
- out:
-	up(&zfcp_data.config_sema);
-	return retval ? retval : (ssize_t) count;
-}
-
-/**
- * zfcp_sysfs_port_failed_show - failed state of port
- * @dev: pointer to belonging device
- * @buf: pointer to input buffer
- *
- * Show function of "failed" attribute of port. Will be
- * "0" if port is working, otherwise "1".
- */
-static ssize_t
-zfcp_sysfs_port_failed_show(struct device *dev, struct device_attribute *attr, char *buf)
-{
-	struct zfcp_port *port;
-
-	port = dev_get_drvdata(dev);
-	if (atomic_test_mask(ZFCP_STATUS_COMMON_ERP_FAILED, &port->status))
-		return sprintf(buf, "1\n");
-	else
-		return sprintf(buf, "0\n");
-}
-
-static DEVICE_ATTR(failed, S_IWUSR | S_IRUGO, zfcp_sysfs_port_failed_show,
-		   zfcp_sysfs_port_failed_store);
-
-/**
- * zfcp_port_common_attrs
- * sysfs attributes that are common for all kind of fc ports.
- */
-static struct attribute *zfcp_port_common_attrs[] = {
-	&dev_attr_failed.attr,
-	&dev_attr_in_recovery.attr,
-	&dev_attr_status.attr,
-	&dev_attr_access_denied.attr,
-	NULL
-};
-
-static struct attribute_group zfcp_port_common_attr_group = {
-	.attrs = zfcp_port_common_attrs,
-};
-
-/**
- * zfcp_port_no_ns_attrs
- * sysfs attributes not to be used for nameserver ports.
- */
-static struct attribute *zfcp_port_no_ns_attrs[] = {
-	&dev_attr_unit_add.attr,
-	&dev_attr_unit_remove.attr,
-	NULL
-};
-
-static struct attribute_group zfcp_port_no_ns_attr_group = {
-	.attrs = zfcp_port_no_ns_attrs,
-};
-
-/**
- * zfcp_sysfs_port_create_files - create sysfs port files
- * @dev: pointer to belonging device
- *
- * Create all attributes of the sysfs representation of a port.
- */
-int
-zfcp_sysfs_port_create_files(struct device *dev, u32 flags)
-{
-	int retval;
-
-	retval = sysfs_create_group(&dev->kobj, &zfcp_port_common_attr_group);
-
-	if ((flags & ZFCP_STATUS_PORT_WKA) || retval)
-		return retval;
-
-	retval = sysfs_create_group(&dev->kobj, &zfcp_port_no_ns_attr_group);
-	if (retval)
-		sysfs_remove_group(&dev->kobj, &zfcp_port_common_attr_group);
-
-	return retval;
-}
-
-/**
- * zfcp_sysfs_port_remove_files - remove sysfs port files
- * @dev: pointer to belonging device
- *
- * Remove all attributes of the sysfs representation of a port.
- */
-void
-zfcp_sysfs_port_remove_files(struct device *dev, u32 flags)
-{
-	sysfs_remove_group(&dev->kobj, &zfcp_port_common_attr_group);
-	if (!(flags & ZFCP_STATUS_PORT_WKA))
-		sysfs_remove_group(&dev->kobj, &zfcp_port_no_ns_attr_group);
-}
--- a/drivers/s390/scsi/zfcp_sysfs_unit.c	2008-06-30 11:24:30.000000000 +0200
+++ /dev/null	1970-01-01 00:00:00.000000000 +0000
@@ -1,150 +0,0 @@
-/*
- * zfcp device driver
- *
- * sysfs interface for zfcp unit.
- *
- * Copyright IBM Corporation 2002, 2008
- */
-
-#include "zfcp_ext.h"
-
-/**
- * zfcp_sysfs_unit_release - gets called when a struct device unit is released
- * @dev: pointer to belonging device
- */
-void
-zfcp_sysfs_unit_release(struct device *dev)
-{
-	kfree(dev);
-}
-
-/**
- * ZFCP_DEFINE_UNIT_ATTR
- * @_name:   name of show attribute
- * @_format: format string
- * @_value:  value to print
- *
- * Generates attribute for a unit.
- */
-#define ZFCP_DEFINE_UNIT_ATTR(_name, _format, _value)                    \
-static ssize_t zfcp_sysfs_unit_##_name##_show(struct device *dev, struct device_attribute *attr,        \
-                                              char *buf)                 \
-{                                                                        \
-        struct zfcp_unit *unit;                                          \
-                                                                         \
-        unit = dev_get_drvdata(dev);                                     \
-        return sprintf(buf, _format, _value);                            \
-}                                                                        \
-                                                                         \
-static DEVICE_ATTR(_name, S_IRUGO, zfcp_sysfs_unit_##_name##_show, NULL);
-
-ZFCP_DEFINE_UNIT_ATTR(status, "0x%08x\n", atomic_read(&unit->status));
-ZFCP_DEFINE_UNIT_ATTR(in_recovery, "%d\n", atomic_test_mask
-		      (ZFCP_STATUS_COMMON_ERP_INUSE, &unit->status));
-ZFCP_DEFINE_UNIT_ATTR(access_denied, "%d\n", atomic_test_mask
-		      (ZFCP_STATUS_COMMON_ACCESS_DENIED, &unit->status));
-ZFCP_DEFINE_UNIT_ATTR(access_shared, "%d\n", atomic_test_mask
-		      (ZFCP_STATUS_UNIT_SHARED, &unit->status));
-ZFCP_DEFINE_UNIT_ATTR(access_readonly, "%d\n", atomic_test_mask
-		      (ZFCP_STATUS_UNIT_READONLY, &unit->status));
-
-/**
- * zfcp_sysfs_unit_failed_store - failed state of unit
- * @dev: pointer to belonging device
- * @buf: pointer to input buffer
- * @count: number of bytes in buffer
- *
- * Store function of the "failed" attribute of a unit.
- * If a "0" gets written to "failed", error recovery will be
- * started for the belonging unit.
- */
-static ssize_t
-zfcp_sysfs_unit_failed_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
-{
-	struct zfcp_unit *unit;
-	unsigned int val;
-	char *endp;
-	int retval = 0;
-
-	down(&zfcp_data.config_sema);
-	unit = dev_get_drvdata(dev);
-	if (atomic_test_mask(ZFCP_STATUS_COMMON_REMOVE, &unit->status)) {
-		retval = -EBUSY;
-		goto out;
-	}
-
-	val = simple_strtoul(buf, &endp, 0);
-	if (((endp + 1) < (buf + count)) || (val != 0)) {
-		retval = -EINVAL;
-		goto out;
-	}
-
-	zfcp_erp_modify_unit_status(unit, 46, NULL,
-				    ZFCP_STATUS_COMMON_RUNNING, ZFCP_SET);
-	zfcp_erp_unit_reopen(unit, ZFCP_STATUS_COMMON_ERP_FAILED, 97, NULL);
-	zfcp_erp_wait(unit->port->adapter);
- out:
-	up(&zfcp_data.config_sema);
-	return retval ? retval : (ssize_t) count;
-}
-
-/**
- * zfcp_sysfs_unit_failed_show - failed state of unit
- * @dev: pointer to belonging device
- * @buf: pointer to input buffer
- *
- * Show function of "failed" attribute of unit. Will be
- * "0" if unit is working, otherwise "1".
- */
-static ssize_t
-zfcp_sysfs_unit_failed_show(struct device *dev, struct device_attribute *attr, char *buf)
-{
-	struct zfcp_unit *unit;
-
-	unit = dev_get_drvdata(dev);
-	if (atomic_test_mask(ZFCP_STATUS_COMMON_ERP_FAILED, &unit->status))
-		return sprintf(buf, "1\n");
-	else
-		return sprintf(buf, "0\n");
-}
-
-static DEVICE_ATTR(failed, S_IWUSR | S_IRUGO, zfcp_sysfs_unit_failed_show,
-		   zfcp_sysfs_unit_failed_store);
-
-static struct attribute *zfcp_unit_attrs[] = {
-	&dev_attr_failed.attr,
-	&dev_attr_in_recovery.attr,
-	&dev_attr_status.attr,
-	&dev_attr_access_denied.attr,
-	&dev_attr_access_shared.attr,
-	&dev_attr_access_readonly.attr,
-	NULL
-};
-
-static struct attribute_group zfcp_unit_attr_group = {
-	.attrs = zfcp_unit_attrs,
-};
-
-/**
- * zfcp_sysfs_create_unit_files - create sysfs unit files
- * @dev: pointer to belonging device
- *
- * Create all attributes of the sysfs representation of a unit.
- */
-int
-zfcp_sysfs_unit_create_files(struct device *dev)
-{
-	return sysfs_create_group(&dev->kobj, &zfcp_unit_attr_group);
-}
-
-/**
- * zfcp_sysfs_remove_unit_files - remove sysfs unit files
- * @dev: pointer to belonging device
- *
- * Remove all attributes of the sysfs representation of a unit.
- */
-void
-zfcp_sysfs_unit_remove_files(struct device *dev)
-{
-	sysfs_remove_group(&dev->kobj, &zfcp_unit_attr_group);
-}
--- /dev/null	1970-01-01 00:00:00.000000000 +0000
+++ b/drivers/s390/scsi/zfcp_sysfs.c	2008-06-30 11:27:59.000000000 +0200
@@ -0,0 +1,496 @@
+/*
+ * zfcp device driver
+ *
+ * sysfs attributes.
+ *
+ * Copyright IBM Corporation 2008
+ */
+
+#include "zfcp_ext.h"
+
+#define ZFCP_DEV_ATTR(_feat, _name, _mode, _show, _store) \
+struct device_attribute dev_attr_##_feat##_##_name = __ATTR(_name, _mode,\
+							    _show, _store)
+#define ZFCP_DEFINE_ATTR(_feat_def, _feat, _name, _format, _value)	       \
+static ssize_t zfcp_sysfs_##_feat##_##_name##_show(struct device *dev,	       \
+						   struct device_attribute *at,\
+						   char *buf)		       \
+{									       \
+	struct _feat_def *_feat = dev_get_drvdata(dev);			       \
+									       \
+	return sprintf(buf, _format, _value);				       \
+}									       \
+static ZFCP_DEV_ATTR(_feat, _name, S_IRUGO,				       \
+		     zfcp_sysfs_##_feat##_##_name##_show, NULL);
+
+ZFCP_DEFINE_ATTR(zfcp_adapter, adapter, status, "0x%08x\n",
+		 atomic_read(&adapter->status));
+ZFCP_DEFINE_ATTR(zfcp_adapter, adapter, peer_wwnn, "0x%016llx\n",
+		 adapter->peer_wwnn);
+ZFCP_DEFINE_ATTR(zfcp_adapter, adapter, peer_wwpn, "0x%016llx\n",
+		 adapter->peer_wwpn);
+ZFCP_DEFINE_ATTR(zfcp_adapter, adapter, peer_d_id, "0x%06x\n",
+		 adapter->peer_d_id);
+ZFCP_DEFINE_ATTR(zfcp_adapter, adapter, card_version, "0x%04x\n",
+		 adapter->hydra_version);
+ZFCP_DEFINE_ATTR(zfcp_adapter, adapter, lic_version, "0x%08x\n",
+		 adapter->fsf_lic_version);
+ZFCP_DEFINE_ATTR(zfcp_adapter, adapter, hardware_version, "0x%08x\n",
+		 adapter->hardware_version);
+ZFCP_DEFINE_ATTR(zfcp_adapter, adapter, in_recovery, "%d\n",
+		 (atomic_read(&adapter->status) &
+		  ZFCP_STATUS_COMMON_ERP_INUSE) != 0);
+
+ZFCP_DEFINE_ATTR(zfcp_port, port, status, "0x%08x\n",
+		 atomic_read(&port->status));
+ZFCP_DEFINE_ATTR(zfcp_port, port, in_recovery, "%d\n",
+		 (atomic_read(&port->status) &
+		  ZFCP_STATUS_COMMON_ERP_INUSE) != 0);
+ZFCP_DEFINE_ATTR(zfcp_port, port, access_denied, "%d\n",
+		 (atomic_read(&port->status) &
+		  ZFCP_STATUS_COMMON_ACCESS_DENIED) != 0);
+
+ZFCP_DEFINE_ATTR(zfcp_unit, unit, status, "0x%08x\n",
+		 atomic_read(&unit->status));
+ZFCP_DEFINE_ATTR(zfcp_unit, unit, in_recovery, "%d\n",
+		 (atomic_read(&unit->status) &
+		  ZFCP_STATUS_COMMON_ERP_INUSE) != 0);
+ZFCP_DEFINE_ATTR(zfcp_unit, unit, access_denied, "%d\n",
+		 (atomic_read(&unit->status) &
+		  ZFCP_STATUS_COMMON_ACCESS_DENIED) != 0);
+ZFCP_DEFINE_ATTR(zfcp_unit, unit, access_shared, "%d\n",
+		 (atomic_read(&unit->status) &
+		  ZFCP_STATUS_UNIT_SHARED) != 0);
+ZFCP_DEFINE_ATTR(zfcp_unit, unit, access_readonly, "%d\n",
+		 (atomic_read(&unit->status) &
+		  ZFCP_STATUS_UNIT_READONLY) != 0);
+
+#define ZFCP_SYSFS_FAILED(_feat_def, _feat, _adapter, _mod_id, _reopen_id)     \
+static ssize_t zfcp_sysfs_##_feat##_failed_show(struct device *dev,	       \
+						struct device_attribute *attr, \
+						char *buf)		       \
+{									       \
+	struct _feat_def *_feat = dev_get_drvdata(dev);			       \
+									       \
+	if (atomic_read(&_feat->status) & ZFCP_STATUS_COMMON_ERP_FAILED)       \
+		return sprintf(buf, "1\n");				       \
+	else								       \
+		return sprintf(buf, "0\n");				       \
+}									       \
+static ssize_t zfcp_sysfs_##_feat##_failed_store(struct device *dev,	       \
+						 struct device_attribute *attr,\
+						 const char *buf, size_t count)\
+{									       \
+	struct _feat_def *_feat = dev_get_drvdata(dev);			       \
+	unsigned long val;						       \
+	int retval = 0;							       \
+									       \
+	down(&zfcp_data.config_sema);					       \
+	if (atomic_read(&_feat->status) & ZFCP_STATUS_COMMON_REMOVE) {	       \
+		retval = -EBUSY;					       \
+		goto out;						       \
+	}								       \
+									       \
+	if (strict_strtoul(buf, 0, &val) || val != 0) {			       \
+		retval = -EINVAL;					       \
+		goto out;						       \
+	}								       \
+									       \
+	zfcp_erp_modify_##_feat##_status(_feat, _mod_id, NULL,		       \
+					 ZFCP_STATUS_COMMON_RUNNING, ZFCP_SET);\
+	zfcp_erp_##_feat##_reopen(_feat, ZFCP_STATUS_COMMON_ERP_FAILED,	       \
+				  _reopen_id, NULL);			       \
+	zfcp_erp_wait(_adapter);					       \
+out:									       \
+	up(&zfcp_data.config_sema);					       \
+	return retval ? retval : (ssize_t) count;			       \
+}									       \
+static ZFCP_DEV_ATTR(_feat, failed, S_IWUSR | S_IRUGO,			       \
+		     zfcp_sysfs_##_feat##_failed_show,			       \
+		     zfcp_sysfs_##_feat##_failed_store);
+
+ZFCP_SYSFS_FAILED(zfcp_adapter, adapter, adapter, 44, 93);
+ZFCP_SYSFS_FAILED(zfcp_port, port, port->adapter, 45, 96);
+ZFCP_SYSFS_FAILED(zfcp_unit, unit, unit->port->adapter, 46, 97);
+
+static ssize_t zfcp_sysfs_port_rescan_store(struct device *dev,
+					    struct device_attribute *attr,
+					    const char *buf, size_t count)
+{
+	struct zfcp_adapter *adapter = dev_get_drvdata(dev);
+	int ret;
+
+	if (atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_REMOVE)
+		return -EBUSY;
+
+	ret = zfcp_scan_ports(adapter);
+	return ret ? ret : (ssize_t) count;
+}
+static ZFCP_DEV_ATTR(adapter, port_rescan, S_IWUSR, NULL,
+		     zfcp_sysfs_port_rescan_store);
+
+static ssize_t zfcp_sysfs_port_remove_store(struct device *dev,
+					    struct device_attribute *attr,
+					    const char *buf, size_t count)
+{
+	struct zfcp_adapter *adapter = dev_get_drvdata(dev);
+	struct zfcp_port *port;
+	wwn_t wwpn;
+	int retval = 0;
+
+	down(&zfcp_data.config_sema);
+	if (atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_REMOVE) {
+		retval = -EBUSY;
+		goto out;
+	}
+
+	if (strict_strtoull(buf, 0, &wwpn)) {
+		retval = -EINVAL;
+		goto out;
+	}
+
+	write_lock_irq(&zfcp_data.config_lock);
+	port = zfcp_get_port_by_wwpn(adapter, wwpn);
+	if (port && (atomic_read(&port->refcount) == 0)) {
+		zfcp_port_get(port);
+		atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE, &port->status);
+		list_move(&port->list, &adapter->port_remove_lh);
+	} else
+		port = NULL;
+	write_unlock_irq(&zfcp_data.config_lock);
+
+	if (!port) {
+		retval = -ENXIO;
+		goto out;
+	}
+
+	zfcp_erp_port_shutdown(port, 0, 92, NULL);
+	zfcp_erp_wait(adapter);
+	zfcp_port_put(port);
+	zfcp_port_dequeue(port);
+ out:
+	up(&zfcp_data.config_sema);
+	return retval ? retval : (ssize_t) count;
+}
+static ZFCP_DEV_ATTR(adapter, port_remove, S_IWUSR, NULL,
+		     zfcp_sysfs_port_remove_store);
+
+static struct attribute *zfcp_adapter_attrs[] = {
+	&dev_attr_adapter_failed.attr,
+	&dev_attr_adapter_in_recovery.attr,
+	&dev_attr_adapter_port_remove.attr,
+	&dev_attr_adapter_port_rescan.attr,
+	&dev_attr_adapter_peer_wwnn.attr,
+	&dev_attr_adapter_peer_wwpn.attr,
+	&dev_attr_adapter_peer_d_id.attr,
+	&dev_attr_adapter_card_version.attr,
+	&dev_attr_adapter_lic_version.attr,
+	&dev_attr_adapter_status.attr,
+	&dev_attr_adapter_hardware_version.attr,
+	NULL
+};
+
+struct attribute_group zfcp_sysfs_adapter_attrs = {
+	.attrs = zfcp_adapter_attrs,
+};
+
+static ssize_t zfcp_sysfs_unit_add_store(struct device *dev,
+					 struct device_attribute *attr,
+					 const char *buf, size_t count)
+{
+	struct zfcp_port *port = dev_get_drvdata(dev);
+	struct zfcp_unit *unit;
+	fcp_lun_t fcp_lun;
+	int retval = -EINVAL;
+
+	down(&zfcp_data.config_sema);
+	if (atomic_read(&port->status) & ZFCP_STATUS_COMMON_REMOVE) {
+		retval = -EBUSY;
+		goto out;
+	}
+
+	if (strict_strtoull(buf, 0, &fcp_lun))
+		goto out;
+
+	unit = zfcp_unit_enqueue(port, fcp_lun);
+	if (IS_ERR(unit))
+		goto out;
+
+	retval = 0;
+
+	zfcp_erp_unit_reopen(unit, 0, 94, NULL);
+	zfcp_erp_wait(unit->port->adapter);
+	zfcp_unit_put(unit);
+out:
+	up(&zfcp_data.config_sema);
+	return retval ? retval : (ssize_t) count;
+}
+static DEVICE_ATTR(unit_add, S_IWUSR, NULL, zfcp_sysfs_unit_add_store);
+
+static ssize_t zfcp_sysfs_unit_remove_store(struct device *dev,
+					    struct device_attribute *attr,
+					    const char *buf, size_t count)
+{
+	struct zfcp_port *port = dev_get_drvdata(dev);
+	struct zfcp_unit *unit;
+	fcp_lun_t fcp_lun;
+	int retval = 0;
+
+	down(&zfcp_data.config_sema);
+	if (atomic_read(&port->status) & ZFCP_STATUS_COMMON_REMOVE) {
+		retval = -EBUSY;
+		goto out;
+	}
+
+	if (strict_strtoull(buf, 0, &fcp_lun)) {
+		retval = -EINVAL;
+		goto out;
+	}
+
+	write_lock_irq(&zfcp_data.config_lock);
+	unit = zfcp_get_unit_by_lun(port, fcp_lun);
+	if (unit && (atomic_read(&unit->refcount) == 0)) {
+		zfcp_unit_get(unit);
+		atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE, &unit->status);
+		list_move(&unit->list, &port->unit_remove_lh);
+	} else
+		unit = NULL;
+
+	write_unlock_irq(&zfcp_data.config_lock);
+
+	if (!unit) {
+		retval = -ENXIO;
+		goto out;
+	}
+
+	zfcp_erp_unit_shutdown(unit, 0, 95, NULL);
+	zfcp_erp_wait(unit->port->adapter);
+	zfcp_unit_put(unit);
+	zfcp_unit_dequeue(unit);
+out:
+	up(&zfcp_data.config_sema);
+	return retval ? retval : (ssize_t) count;
+}
+static DEVICE_ATTR(unit_remove, S_IWUSR, NULL, zfcp_sysfs_unit_remove_store);
+
+static struct attribute *zfcp_port_ns_attrs[] = {
+	&dev_attr_port_failed.attr,
+	&dev_attr_port_in_recovery.attr,
+	&dev_attr_port_status.attr,
+	&dev_attr_port_access_denied.attr,
+	NULL
+};
+
+/**
+ * zfcp_sysfs_ns_port_attrs - sysfs attributes for nameserver
+ */
+struct attribute_group zfcp_sysfs_ns_port_attrs = {
+	.attrs = zfcp_port_ns_attrs,
+};
+
+static struct attribute *zfcp_port_no_ns_attrs[] = {
+	&dev_attr_unit_add.attr,
+	&dev_attr_unit_remove.attr,
+	&dev_attr_port_failed.attr,
+	&dev_attr_port_in_recovery.attr,
+	&dev_attr_port_status.attr,
+	&dev_attr_port_access_denied.attr,
+	NULL
+};
+
+/**
+ * zfcp_sysfs_port_attrs - sysfs attributes for all other ports
+ */
+struct attribute_group zfcp_sysfs_port_attrs = {
+	.attrs = zfcp_port_no_ns_attrs,
+};
+
+static struct attribute *zfcp_unit_attrs[] = {
+	&dev_attr_unit_failed.attr,
+	&dev_attr_unit_in_recovery.attr,
+	&dev_attr_unit_status.attr,
+	&dev_attr_unit_access_denied.attr,
+	&dev_attr_unit_access_shared.attr,
+	&dev_attr_unit_access_readonly.attr,
+	NULL
+};
+
+struct attribute_group zfcp_sysfs_unit_attrs = {
+	.attrs = zfcp_unit_attrs,
+};
+
+#define ZFCP_DEFINE_LATENCY_ATTR(_name) 				\
+static ssize_t								\
+zfcp_sysfs_unit_##_name##_latency_show(struct device *dev,		\
+				       struct device_attribute *attr,	\
+				       char *buf) {			\
+	struct scsi_device *sdev = to_scsi_device(dev);			\
+	struct zfcp_unit *unit = sdev->hostdata;			\
+	struct zfcp_latencies *lat = &unit->latencies;			\
+	struct zfcp_adapter *adapter = unit->port->adapter;		\
+	unsigned long flags;						\
+	unsigned long long fsum, fmin, fmax, csum, cmin, cmax, cc;	\
+									\
+	spin_lock_irqsave(&lat->lock, flags);				\
+	fsum = lat->_name.fabric.sum * adapter->timer_ticks;		\
+	fmin = lat->_name.fabric.min * adapter->timer_ticks;		\
+	fmax = lat->_name.fabric.max * adapter->timer_ticks;		\
+	csum = lat->_name.channel.sum * adapter->timer_ticks;		\
+	cmin = lat->_name.channel.min * adapter->timer_ticks;		\
+	cmax = lat->_name.channel.max * adapter->timer_ticks;		\
+	cc  = lat->_name.counter;					\
+	spin_unlock_irqrestore(&lat->lock, flags);			\
+									\
+	do_div(fsum, 1000);						\
+	do_div(fmin, 1000);						\
+	do_div(fmax, 1000);						\
+	do_div(csum, 1000);						\
+	do_div(cmin, 1000);						\
+	do_div(cmax, 1000);						\
+									\
+	return sprintf(buf, "%llu %llu %llu %llu %llu %llu %llu\n",	\
+		       fmin, fmax, fsum, cmin, cmax, csum, cc); 	\
+}									\
+static ssize_t								\
+zfcp_sysfs_unit_##_name##_latency_store(struct device *dev,		\
+					struct device_attribute *attr,	\
+					const char *buf, size_t count)	\
+{									\
+	struct scsi_device *sdev = to_scsi_device(dev);			\
+	struct zfcp_unit *unit = sdev->hostdata;			\
+	struct zfcp_latencies *lat = &unit->latencies;			\
+	unsigned long flags;						\
+									\
+	spin_lock_irqsave(&lat->lock, flags);				\
+	lat->_name.fabric.sum = 0;					\
+	lat->_name.fabric.min = 0xFFFFFFFF;				\
+	lat->_name.fabric.max = 0;					\
+	lat->_name.channel.sum = 0;					\
+	lat->_name.channel.min = 0xFFFFFFFF;				\
+	lat->_name.channel.max = 0;					\
+	lat->_name.counter = 0;						\
+	spin_unlock_irqrestore(&lat->lock, flags);			\
+									\
+	return (ssize_t) count;						\
+}									\
+static DEVICE_ATTR(_name##_latency, S_IWUSR | S_IRUGO,			\
+		   zfcp_sysfs_unit_##_name##_latency_show,		\
+		   zfcp_sysfs_unit_##_name##_latency_store);
+
+ZFCP_DEFINE_LATENCY_ATTR(read);
+ZFCP_DEFINE_LATENCY_ATTR(write);
+ZFCP_DEFINE_LATENCY_ATTR(cmd);
+
+#define ZFCP_DEFINE_SCSI_ATTR(_name, _format, _value)			\
+static ssize_t zfcp_sysfs_scsi_##_name##_show(struct device *dev,	\
+					      struct device_attribute *attr,\
+					      char *buf)                 \
+{                                                                        \
+	struct scsi_device *sdev  = to_scsi_device(dev);		 \
+	struct zfcp_unit *unit = sdev->hostdata;			 \
+									 \
+	return sprintf(buf, _format, _value);                            \
+}                                                                        \
+static DEVICE_ATTR(_name, S_IRUGO, zfcp_sysfs_scsi_##_name##_show, NULL);
+
+ZFCP_DEFINE_SCSI_ATTR(hba_id, "%s\n",
+	unit->port->adapter->ccw_device->dev.bus_id);
+ZFCP_DEFINE_SCSI_ATTR(wwpn, "0x%016llx\n", unit->port->wwpn);
+ZFCP_DEFINE_SCSI_ATTR(fcp_lun, "0x%016llx\n", unit->fcp_lun);
+
+struct device_attribute *zfcp_sysfs_sdev_attrs[] = {
+	&dev_attr_fcp_lun,
+	&dev_attr_wwpn,
+	&dev_attr_hba_id,
+	&dev_attr_read_latency,
+	&dev_attr_write_latency,
+	&dev_attr_cmd_latency,
+	NULL
+};
+
+static ssize_t zfcp_sysfs_adapter_util_show(struct device *dev,
+					    struct device_attribute *attr,
+					    char *buf)
+{
+	struct Scsi_Host *scsi_host = dev_to_shost(dev);
+	struct fsf_qtcb_bottom_port *qtcb_port;
+	struct zfcp_adapter *adapter;
+	int retval;
+
+	adapter = (struct zfcp_adapter *) scsi_host->hostdata[0];
+	if (!(adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA))
+		return -EOPNOTSUPP;
+
+	qtcb_port = kzalloc(sizeof(struct fsf_qtcb_bottom_port), GFP_KERNEL);
+	if (!qtcb_port)
+		return -ENOMEM;
+
+	retval = zfcp_fsf_exchange_port_data_sync(adapter, qtcb_port);
+	if (!retval)
+		retval = sprintf(buf, "%u %u %u\n", qtcb_port->cp_util,
+				 qtcb_port->cb_util, qtcb_port->a_util);
+	kfree(qtcb_port);
+	return retval;
+}
+static DEVICE_ATTR(utilization, S_IRUGO, zfcp_sysfs_adapter_util_show, NULL);
+
+static int zfcp_sysfs_adapter_ex_config(struct device *dev,
+					struct fsf_statistics_info *stat_inf)
+{
+	struct Scsi_Host *scsi_host = dev_to_shost(dev);
+	struct fsf_qtcb_bottom_config *qtcb_config;
+	struct zfcp_adapter *adapter;
+	int retval;
+
+	adapter = (struct zfcp_adapter *) scsi_host->hostdata[0];
+	if (!(adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA))
+		return -EOPNOTSUPP;
+
+	qtcb_config = kzalloc(sizeof(struct fsf_qtcb_bottom_config),
+			      GFP_KERNEL);
+	if (!qtcb_config)
+		return -ENOMEM;
+
+	retval = zfcp_fsf_exchange_config_data_sync(adapter, qtcb_config);
+	if (!retval)
+		*stat_inf = qtcb_config->stat_info;
+
+	kfree(qtcb_config);
+	return retval;
+}
+
+#define ZFCP_SHOST_ATTR(_name, _format, _arg...)			\
+static ssize_t zfcp_sysfs_adapter_##_name##_show(struct device *dev,	\
+						 struct device_attribute *attr,\
+						 char *buf)		\
+{									\
+	struct fsf_statistics_info stat_info;				\
+	int retval;							\
+									\
+	retval = zfcp_sysfs_adapter_ex_config(dev, &stat_info);		\
+	if (retval)							\
+		return retval;						\
+									\
+	return sprintf(buf, _format, ## _arg);				\
+}									\
+static DEVICE_ATTR(_name, S_IRUGO, zfcp_sysfs_adapter_##_name##_show, NULL);
+
+ZFCP_SHOST_ATTR(requests, "%llu %llu %llu\n",
+		(unsigned long long) stat_info.input_req,
+		(unsigned long long) stat_info.output_req,
+		(unsigned long long) stat_info.control_req);
+
+ZFCP_SHOST_ATTR(megabytes, "%llu %llu\n",
+		(unsigned long long) stat_info.input_mb,
+		(unsigned long long) stat_info.output_mb);
+
+ZFCP_SHOST_ATTR(seconds_active, "%llu\n",
+		(unsigned long long) stat_info.seconds_act);
+
+struct device_attribute *zfcp_sysfs_shost_attrs[] = {
+	&dev_attr_utilization,
+	&dev_attr_requests,
+	&dev_attr_megabytes,
+	&dev_attr_seconds_active,
+	NULL
+};
--- a/drivers/s390/scsi/zfcp_sysfs_adapter.c	2008-06-30 11:24:49.000000000 +0200
+++ /dev/null	1970-01-01 00:00:00.000000000 +0000
@@ -1,232 +0,0 @@
-/*
- * zfcp device driver
- *
- * sysfs attributes for CCW device.
- *
- * Copyright IBM Corporation 2002, 2008
- */
-
-#include "zfcp_ext.h"
-
-/**
- * ZFCP_DEFINE_ADAPTER_ATTR
- * @_name:   name of show attribute
- * @_format: format string
- * @_value:  value to print
- *
- * Generates attributes for an adapter.
- */
-#define ZFCP_DEFINE_ADAPTER_ATTR(_name, _format, _value)                      \
-static ssize_t zfcp_sysfs_adapter_##_name##_show(struct device *dev, struct device_attribute *attr,          \
-						 char *buf)                   \
-{                                                                             \
-	struct zfcp_adapter *adapter;                                         \
-                                                                              \
-	adapter = dev_get_drvdata(dev);                                       \
-	return sprintf(buf, _format, _value);                                 \
-}                                                                             \
-                                                                              \
-static DEVICE_ATTR(_name, S_IRUGO, zfcp_sysfs_adapter_##_name##_show, NULL);
-
-ZFCP_DEFINE_ADAPTER_ATTR(status, "0x%08x\n", atomic_read(&adapter->status));
-ZFCP_DEFINE_ADAPTER_ATTR(peer_wwnn, "0x%016llx\n", adapter->peer_wwnn);
-ZFCP_DEFINE_ADAPTER_ATTR(peer_wwpn, "0x%016llx\n", adapter->peer_wwpn);
-ZFCP_DEFINE_ADAPTER_ATTR(peer_d_id, "0x%06x\n", adapter->peer_d_id);
-ZFCP_DEFINE_ADAPTER_ATTR(card_version, "0x%04x\n", adapter->hydra_version);
-ZFCP_DEFINE_ADAPTER_ATTR(lic_version, "0x%08x\n", adapter->fsf_lic_version);
-ZFCP_DEFINE_ADAPTER_ATTR(hardware_version, "0x%08x\n",
-			 adapter->hardware_version);
-ZFCP_DEFINE_ADAPTER_ATTR(in_recovery, "%d\n", atomic_test_mask
-			 (ZFCP_STATUS_COMMON_ERP_INUSE, &adapter->status));
-
-/**
- * zfcp_sysfs_port_rescan - trigger manual port rescan
- * @dev: pointer to belonging device
- * @attr: pointer to struct device_attribute
- * @buf: pointer to input buffer
- * @count: number of bytes in buffer
- */
-static ssize_t zfcp_sysfs_port_rescan_store(struct device *dev,
-					    struct device_attribute *attr,
-					    const char *buf, size_t count)
-{
-	struct zfcp_adapter *adapter;
-	int ret;
-
-	adapter = dev_get_drvdata(dev);
-	if (atomic_test_mask(ZFCP_STATUS_COMMON_REMOVE, &adapter->status))
-		return -EBUSY;
-
-	ret = zfcp_scan_ports(adapter);
-
-	return ret ? ret : (ssize_t) count;
-}
-static DEVICE_ATTR(port_rescan, S_IWUSR, NULL, zfcp_sysfs_port_rescan_store);
-
-/**
- * zfcp_sysfs_port_remove_store - remove a port from sysfs tree
- * @dev: pointer to belonging device
- * @buf: pointer to input buffer
- * @count: number of bytes in buffer
- *
- * Store function of the "port_remove" attribute of an adapter.
- */
-static ssize_t
-zfcp_sysfs_port_remove_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
-{
-	struct zfcp_adapter *adapter;
-	struct zfcp_port *port;
-	wwn_t wwpn;
-	char *endp;
-	int retval = 0;
-
-	down(&zfcp_data.config_sema);
-
-	adapter = dev_get_drvdata(dev);
-	if (atomic_test_mask(ZFCP_STATUS_COMMON_REMOVE, &adapter->status)) {
-		retval = -EBUSY;
-		goto out;
-	}
-
-	wwpn = simple_strtoull(buf, &endp, 0);
-	if ((endp + 1) < (buf + count)) {
-		retval = -EINVAL;
-		goto out;
-	}
-
-	write_lock_irq(&zfcp_data.config_lock);
-	port = zfcp_get_port_by_wwpn(adapter, wwpn);
-	if (port && (atomic_read(&port->refcount) == 0)) {
-		zfcp_port_get(port);
-		atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE, &port->status);
-		list_move(&port->list, &adapter->port_remove_lh);
-	}
-	else {
-		port = NULL;
-	}
-	write_unlock_irq(&zfcp_data.config_lock);
-
-	if (!port) {
-		retval = -ENXIO;
-		goto out;
-	}
-
-	zfcp_erp_port_shutdown(port, 0, 92, NULL);
-	zfcp_erp_wait(adapter);
-	zfcp_port_put(port);
-	zfcp_port_dequeue(port);
- out:
-	up(&zfcp_data.config_sema);
-	return retval ? retval : (ssize_t) count;
-}
-
-static DEVICE_ATTR(port_remove, S_IWUSR, NULL, zfcp_sysfs_port_remove_store);
-
-/**
- * zfcp_sysfs_adapter_failed_store - failed state of adapter
- * @dev: pointer to belonging device
- * @buf: pointer to input buffer
- * @count: number of bytes in buffer
- *
- * Store function of the "failed" attribute of an adapter.
- * If a "0" gets written to "failed", error recovery will be
- * started for the belonging adapter.
- */
-static ssize_t
-zfcp_sysfs_adapter_failed_store(struct device *dev, struct device_attribute *attr,
-				const char *buf, size_t count)
-{
-	struct zfcp_adapter *adapter;
-	unsigned int val;
-	char *endp;
-	int retval = 0;
-
-	down(&zfcp_data.config_sema);
-
-	adapter = dev_get_drvdata(dev);
-	if (atomic_test_mask(ZFCP_STATUS_COMMON_REMOVE, &adapter->status)) {
-		retval = -EBUSY;
-		goto out;
-	}
-
-	val = simple_strtoul(buf, &endp, 0);
-	if (((endp + 1) < (buf + count)) || (val != 0)) {
-		retval = -EINVAL;
-		goto out;
-	}
-
-	zfcp_erp_modify_adapter_status(adapter, 44, NULL,
-				       ZFCP_STATUS_COMMON_RUNNING, ZFCP_SET);
-	zfcp_erp_adapter_reopen(adapter, ZFCP_STATUS_COMMON_ERP_FAILED, 93,
-				NULL);
-	zfcp_erp_wait(adapter);
- out:
-	up(&zfcp_data.config_sema);
-	return retval ? retval : (ssize_t) count;
-}
-
-/**
- * zfcp_sysfs_adapter_failed_show - failed state of adapter
- * @dev: pointer to belonging device
- * @buf: pointer to input buffer
- *
- * Show function of "failed" attribute of adapter. Will be
- * "0" if adapter is working, otherwise "1".
- */
-static ssize_t
-zfcp_sysfs_adapter_failed_show(struct device *dev, struct device_attribute *attr, char *buf)
-{
-	struct zfcp_adapter *adapter;
-
-	adapter = dev_get_drvdata(dev);
-	if (atomic_test_mask(ZFCP_STATUS_COMMON_ERP_FAILED, &adapter->status))
-		return sprintf(buf, "1\n");
-	else
-		return sprintf(buf, "0\n");
-}
-
-static DEVICE_ATTR(failed, S_IWUSR | S_IRUGO, zfcp_sysfs_adapter_failed_show,
-		   zfcp_sysfs_adapter_failed_store);
-
-static struct attribute *zfcp_adapter_attrs[] = {
-	&dev_attr_failed.attr,
-	&dev_attr_in_recovery.attr,
-	&dev_attr_port_remove.attr,
-	&dev_attr_port_rescan.attr,
-	&dev_attr_peer_wwnn.attr,
-	&dev_attr_peer_wwpn.attr,
-	&dev_attr_peer_d_id.attr,
-	&dev_attr_card_version.attr,
-	&dev_attr_lic_version.attr,
-	&dev_attr_status.attr,
-	&dev_attr_hardware_version.attr,
-	NULL
-};
-
-static struct attribute_group zfcp_adapter_attr_group = {
-	.attrs = zfcp_adapter_attrs,
-};
-
-/**
- * zfcp_sysfs_create_adapter_files - create sysfs adapter files
- * @dev: pointer to belonging device
- *
- * Create all attributes of the sysfs representation of an adapter.
- */
-int
-zfcp_sysfs_adapter_create_files(struct device *dev)
-{
-	return sysfs_create_group(&dev->kobj, &zfcp_adapter_attr_group);
-}
-
-/**
- * zfcp_sysfs_remove_adapter_files - remove sysfs adapter files
- * @dev: pointer to belonging device
- *
- * Remove all attributes of the sysfs representation of an adapter.
- */
-void
-zfcp_sysfs_adapter_remove_files(struct device *dev)
-{
-	sysfs_remove_group(&dev->kobj, &zfcp_adapter_attr_group);
-}
--- a/drivers/s390/scsi/zfcp_aux.c	2008-06-30 11:27:42.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_aux.c	2008-06-30 11:27:59.000000000 +0200
@@ -252,6 +252,11 @@ struct zfcp_port *zfcp_get_port_by_wwpn(
 	return NULL;
 }
 
+static void zfcp_sysfs_unit_release(struct device *dev)
+{
+	kfree(container_of(dev, struct zfcp_unit, sysfs_device));
+}
+
 /**
  * zfcp_unit_enqueue - enqueue unit to unit list of a port.
  * @port: pointer to port where unit is added
@@ -301,7 +306,8 @@ struct zfcp_unit *zfcp_unit_enqueue(stru
 	if (device_register(&unit->sysfs_device))
 		goto err_out_free;
 
-	if (zfcp_sysfs_unit_create_files(&unit->sysfs_device)) {
+	if (sysfs_create_group(&unit->sysfs_device.kobj,
+			       &zfcp_sysfs_unit_attrs)) {
 		device_unregister(&unit->sysfs_device);
 		return ERR_PTR(-EIO);
 	}
@@ -341,7 +347,7 @@ void zfcp_unit_dequeue(struct zfcp_unit 
 	write_unlock_irq(&zfcp_data.config_lock);
 	unit->port->units--;
 	zfcp_port_put(unit->port);
-	zfcp_sysfs_unit_remove_files(&unit->sysfs_device);
+	sysfs_remove_group(&unit->sysfs_device.kobj, &zfcp_sysfs_unit_attrs);
 	device_unregister(&unit->sysfs_device);
 }
 
@@ -518,7 +524,8 @@ int zfcp_adapter_enqueue(struct ccw_devi
 
 	dev_set_drvdata(&ccw_device->dev, adapter);
 
-	if (zfcp_sysfs_adapter_create_files(&ccw_device->dev))
+	if (sysfs_create_group(&ccw_device->dev.kobj,
+			       &zfcp_sysfs_adapter_attrs))
 		goto sysfs_failed;
 
 	adapter->generic_services.parent = &adapter->ccw_device->dev;
@@ -541,7 +548,8 @@ int zfcp_adapter_enqueue(struct ccw_devi
 	return 0;
 
 generic_services_failed:
-	zfcp_sysfs_adapter_remove_files(&adapter->ccw_device->dev);
+	sysfs_remove_group(&ccw_device->dev.kobj,
+			   &zfcp_sysfs_adapter_attrs);
 sysfs_failed:
 	zfcp_adapter_debug_unregister(adapter);
 debug_register_failed:
@@ -569,7 +577,8 @@ void zfcp_adapter_dequeue(struct zfcp_ad
 	cancel_work_sync(&adapter->stat_work);
 	zfcp_adapter_scsi_unregister(adapter);
 	device_unregister(&adapter->generic_services);
-	zfcp_sysfs_adapter_remove_files(&adapter->ccw_device->dev);
+	sysfs_remove_group(&adapter->ccw_device->dev.kobj,
+			   &zfcp_sysfs_adapter_attrs);
 	dev_set_drvdata(&adapter->ccw_device->dev, NULL);
 	/* sanity check: no pending FSF requests */
 	spin_lock_irqsave(&adapter->req_list_lock, flags);
@@ -597,6 +606,11 @@ void zfcp_adapter_dequeue(struct zfcp_ad
 	kfree(adapter);
 }
 
+static void zfcp_sysfs_port_release(struct device *dev)
+{
+	kfree(container_of(dev, struct zfcp_port, sysfs_device));
+}
+
 /**
  * zfcp_port_enqueue - enqueue port to port list of adapter
  * @adapter: adapter where remote port is added
@@ -614,6 +628,7 @@ struct zfcp_port *zfcp_port_enqueue(stru
 				     u32 status, u32 d_id)
 {
 	struct zfcp_port *port;
+	int retval;
 	char *bus_id;
 
 	port = kzalloc(sizeof(struct zfcp_port), GFP_KERNEL);
@@ -676,7 +691,14 @@ struct zfcp_port *zfcp_port_enqueue(stru
 	if (device_register(&port->sysfs_device))
 		goto err_out_free;
 
-	if (zfcp_sysfs_port_create_files(&port->sysfs_device, status)) {
+	if (status & ZFCP_STATUS_PORT_WKA)
+		retval = sysfs_create_group(&port->sysfs_device.kobj,
+					    &zfcp_sysfs_ns_port_attrs);
+	else
+		retval = sysfs_create_group(&port->sysfs_device.kobj,
+					    &zfcp_sysfs_port_attrs);
+
+	if (retval) {
 		device_unregister(&port->sysfs_device);
 		goto err_out;
 	}
@@ -718,8 +740,12 @@ void zfcp_port_dequeue(struct zfcp_port 
 		fc_remote_port_delete(port->rport);
 	port->rport = NULL;
 	zfcp_adapter_put(port->adapter);
-	zfcp_sysfs_port_remove_files(&port->sysfs_device,
-				     atomic_read(&port->status));
+	if (atomic_read(&port->status) & ZFCP_STATUS_PORT_WKA)
+		sysfs_remove_group(&port->sysfs_device.kobj,
+				   &zfcp_sysfs_ns_port_attrs);
+	else
+		sysfs_remove_group(&port->sysfs_device.kobj,
+				   &zfcp_sysfs_port_attrs);
 	device_unregister(&port->sysfs_device);
 }
 
--- a/drivers/s390/scsi/zfcp_ext.h	2008-06-30 11:27:42.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_ext.h	2008-06-30 11:27:59.000000000 +0200
@@ -13,15 +13,13 @@
 
 extern struct zfcp_data zfcp_data;
 
-/******************************** SYSFS  *************************************/
-extern int  zfcp_sysfs_adapter_create_files(struct device *);
-extern void zfcp_sysfs_adapter_remove_files(struct device *);
-extern int  zfcp_sysfs_port_create_files(struct device *, u32);
-extern void zfcp_sysfs_port_remove_files(struct device *, u32);
-extern int  zfcp_sysfs_unit_create_files(struct device *);
-extern void zfcp_sysfs_unit_remove_files(struct device *);
-extern void zfcp_sysfs_port_release(struct device *);
-extern void zfcp_sysfs_unit_release(struct device *);
+/* zfcp_sysfs.c */
+extern struct attribute_group zfcp_sysfs_unit_attrs;
+extern struct attribute_group zfcp_sysfs_adapter_attrs;
+extern struct attribute_group zfcp_sysfs_ns_port_attrs;
+extern struct attribute_group zfcp_sysfs_port_attrs;
+extern struct device_attribute *zfcp_sysfs_sdev_attrs[];
+extern struct device_attribute *zfcp_sysfs_shost_attrs[];
 
 /**************************** CONFIGURATION  *********************************/
 extern struct zfcp_unit *zfcp_get_unit_by_lun(struct zfcp_port *, fcp_lun_t);
--- a/drivers/s390/scsi/Makefile	2008-06-30 11:24:30.000000000 +0200
+++ b/drivers/s390/scsi/Makefile	2008-06-30 11:27:59.000000000 +0200
@@ -3,7 +3,6 @@
 #
 
 zfcp-objs := zfcp_aux.o zfcp_ccw.o zfcp_scsi.o zfcp_erp.o zfcp_qdio.o \
-	     zfcp_fsf.o zfcp_dbf.o zfcp_sysfs_adapter.o zfcp_sysfs_port.o \
-	     zfcp_sysfs_unit.o zfcp_fc.o zfcp_cfdc.o
+	     zfcp_fsf.o zfcp_dbf.o zfcp_sysfs.o zfcp_fc.o zfcp_cfdc.o
 
 obj-$(CONFIG_ZFCP) += zfcp.o
--- a/drivers/s390/scsi/zfcp_scsi.c	2008-06-30 11:27:23.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_scsi.c	2008-06-30 11:27:59.000000000 +0200
@@ -520,209 +520,6 @@ struct fc_function_template zfcp_transpo
 	.disable_target_scan = 1,
 };
 
-#define ZFCP_DEFINE_LATENCY_ATTR(_name) 				\
-static ssize_t								\
-zfcp_sysfs_unit_##_name##_latency_show(struct device *dev,		\
-				       struct device_attribute *attr,	\
-				       char *buf) {			\
-	struct scsi_device *sdev = to_scsi_device(dev);			\
-	struct zfcp_unit *unit = sdev->hostdata;			\
-	struct zfcp_latencies *lat = &unit->latencies;			\
-	struct zfcp_adapter *adapter = unit->port->adapter;		\
-	unsigned long flags;						\
-	unsigned long long fsum, fmin, fmax, csum, cmin, cmax, cc;	\
-									\
-	spin_lock_irqsave(&lat->lock, flags);				\
-	fsum = lat->_name.fabric.sum * adapter->timer_ticks;		\
-	fmin = lat->_name.fabric.min * adapter->timer_ticks;		\
-	fmax = lat->_name.fabric.max * adapter->timer_ticks;		\
-	csum = lat->_name.channel.sum * adapter->timer_ticks;		\
-	cmin = lat->_name.channel.min * adapter->timer_ticks;		\
-	cmax = lat->_name.channel.max * adapter->timer_ticks;		\
-	cc  = lat->_name.counter;					\
-	spin_unlock_irqrestore(&lat->lock, flags);			\
-									\
-	do_div(fsum, 1000);						\
-	do_div(fmin, 1000);						\
-	do_div(fmax, 1000);						\
-	do_div(csum, 1000);						\
-	do_div(cmin, 1000);						\
-	do_div(cmax, 1000);						\
-									\
-	return sprintf(buf, "%llu %llu %llu %llu %llu %llu %llu\n",	\
-		       fmin, fmax, fsum, cmin, cmax, csum, cc); 	\
-}									\
-static ssize_t								\
-zfcp_sysfs_unit_##_name##_latency_store(struct device *dev,		\
-					struct device_attribute *attr,	\
-					const char *buf, size_t count)	\
-{									\
-	struct scsi_device *sdev = to_scsi_device(dev);			\
-	struct zfcp_unit *unit = sdev->hostdata;			\
-	struct zfcp_latencies *lat = &unit->latencies;			\
-	unsigned long flags;						\
-									\
-	spin_lock_irqsave(&lat->lock, flags);				\
-	lat->_name.fabric.sum = 0;					\
-	lat->_name.fabric.min = 0xFFFFFFFF;				\
-	lat->_name.fabric.max = 0;					\
-	lat->_name.channel.sum = 0;					\
-	lat->_name.channel.min = 0xFFFFFFFF;				\
-	lat->_name.channel.max = 0;					\
-	lat->_name.counter = 0;						\
-	spin_unlock_irqrestore(&lat->lock, flags);			\
-									\
-	return (ssize_t) count;						\
-}									\
-static DEVICE_ATTR(_name##_latency, S_IWUSR | S_IRUGO,			\
-		   zfcp_sysfs_unit_##_name##_latency_show,		\
-		   zfcp_sysfs_unit_##_name##_latency_store);
-
-ZFCP_DEFINE_LATENCY_ATTR(read);
-ZFCP_DEFINE_LATENCY_ATTR(write);
-ZFCP_DEFINE_LATENCY_ATTR(cmd);
-
-#define ZFCP_DEFINE_SCSI_ATTR(_name, _format, _value)                    \
-static ssize_t zfcp_sysfs_scsi_##_name##_show(struct device *dev, struct device_attribute *attr,        \
-                                              char *buf)                 \
-{                                                                        \
-        struct scsi_device *sdev;                                        \
-        struct zfcp_unit *unit;                                          \
-                                                                         \
-        sdev = to_scsi_device(dev);                                      \
-        unit = sdev->hostdata;                                           \
-        return sprintf(buf, _format, _value);                            \
-}                                                                        \
-                                                                         \
-static DEVICE_ATTR(_name, S_IRUGO, zfcp_sysfs_scsi_##_name##_show, NULL);
-
-ZFCP_DEFINE_SCSI_ATTR(hba_id, "%s\n",
-	unit->port->adapter->ccw_device->dev.bus_id);
-ZFCP_DEFINE_SCSI_ATTR(wwpn, "0x%016llx\n", unit->port->wwpn);
-ZFCP_DEFINE_SCSI_ATTR(fcp_lun, "0x%016llx\n", unit->fcp_lun);
-
-static struct device_attribute *zfcp_sysfs_sdev_attrs[] = {
-	&dev_attr_fcp_lun,
-	&dev_attr_wwpn,
-	&dev_attr_hba_id,
-	&dev_attr_read_latency,
-	&dev_attr_write_latency,
-	&dev_attr_cmd_latency,
-	NULL
-};
-
-static ssize_t zfcp_sysfs_adapter_util_show(struct device *dev,
-					    struct device_attribute *attr,
-					    char *buf)
-{
-	struct Scsi_Host *scsi_host = dev_to_shost(dev);
-	struct fsf_qtcb_bottom_port *qtcb_port;
-	struct zfcp_adapter *adapter;
-	int retval;
-
-	adapter = (struct zfcp_adapter *) scsi_host->hostdata[0];
-	if (!(adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA))
-		return -EOPNOTSUPP;
-
-	qtcb_port = kzalloc(sizeof(struct fsf_qtcb_bottom_port), GFP_KERNEL);
-	if (!qtcb_port)
-		return -ENOMEM;
-
-	retval = zfcp_fsf_exchange_port_data_sync(adapter, qtcb_port);
-	if (!retval)
-		retval = sprintf(buf, "%u %u %u\n", qtcb_port->cp_util,
-				 qtcb_port->cb_util, qtcb_port->a_util);
-	kfree(qtcb_port);
-	return retval;
-}
-
-static int zfcp_sysfs_adapter_ex_config(struct device *dev,
-					struct fsf_statistics_info *stat_inf)
-{
-	struct Scsi_Host *scsi_host = dev_to_shost(dev);
-	struct fsf_qtcb_bottom_config *qtcb_config;
-	struct zfcp_adapter *adapter;
-	int retval;
-
-	adapter = (struct zfcp_adapter *) scsi_host->hostdata[0];
-	if (!(adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA))
-		return -EOPNOTSUPP;
-
-	qtcb_config = kzalloc(sizeof(struct fsf_qtcb_bottom_config),
-			      GFP_KERNEL);
-	if (!qtcb_config)
-		return -ENOMEM;
-
-	retval = zfcp_fsf_exchange_config_data_sync(adapter, qtcb_config);
-	if (!retval)
-		*stat_inf = qtcb_config->stat_info;
-
-	kfree(qtcb_config);
-	return retval;
-}
-
-static ssize_t zfcp_sysfs_adapter_request_show(struct device *dev,
-					       struct device_attribute *attr,
-					       char *buf)
-{
-	struct fsf_statistics_info stat_info;
-	int retval;
-
-	retval = zfcp_sysfs_adapter_ex_config(dev, &stat_info);
-	if (retval)
-		return retval;
-
-	return sprintf(buf, "%llu %llu %llu\n",
-		       (unsigned long long) stat_info.input_req,
-		       (unsigned long long) stat_info.output_req,
-		       (unsigned long long) stat_info.control_req);
-}
-
-static ssize_t zfcp_sysfs_adapter_mb_show(struct device *dev,
-					  struct device_attribute *attr,
-					  char *buf)
-{
-	struct fsf_statistics_info stat_info;
-	int retval;
-
-	retval = zfcp_sysfs_adapter_ex_config(dev, &stat_info);
-	if (retval)
-		return retval;
-
-	return sprintf(buf, "%llu %llu\n",
-		       (unsigned long long) stat_info.input_mb,
-		       (unsigned long long) stat_info.output_mb);
-}
-
-static ssize_t zfcp_sysfs_adapter_sec_active_show(struct device *dev,
-						  struct device_attribute *attr,
-						  char *buf)
-{
-	struct fsf_statistics_info stat_info;
-	int retval;
-
-	retval = zfcp_sysfs_adapter_ex_config(dev, &stat_info);
-	if (retval)
-		return retval;
-
-	return sprintf(buf, "%llu\n",
-		       (unsigned long long) stat_info.seconds_act);
-}
-
-static DEVICE_ATTR(utilization, S_IRUGO, zfcp_sysfs_adapter_util_show, NULL);
-static DEVICE_ATTR(requests, S_IRUGO, zfcp_sysfs_adapter_request_show, NULL);
-static DEVICE_ATTR(megabytes, S_IRUGO, zfcp_sysfs_adapter_mb_show, NULL);
-static DEVICE_ATTR(seconds_active, S_IRUGO,
-		   zfcp_sysfs_adapter_sec_active_show, NULL);
-
-static struct device_attribute *zfcp_a_stats_attrs[] = {
-	&dev_attr_utilization,
-	&dev_attr_requests,
-	&dev_attr_megabytes,
-	&dev_attr_seconds_active,
-	NULL
-};
-
 struct zfcp_data zfcp_data = {
 	.scsi_host_template = {
 		.name			 = "zfcp",
@@ -743,7 +540,6 @@ struct zfcp_data zfcp_data = {
 		.use_clustering		 = 1,
 		.sdev_attrs		 = zfcp_sysfs_sdev_attrs,
 		.max_sectors		 = (ZFCP_MAX_SBALES_PER_REQ * 8),
-		.shost_attrs		 = zfcp_a_stats_attrs,
+		.shost_attrs		 = zfcp_sysfs_shost_attrs,
 	},
 };
-

-- 

[patch 09/11] zfcp: zfcp_fsf cleanup.

[christof.schmitt]

[-- Attachment #1: fsf-cleanup.diff --]
[-- Type: text/plain, Size: 167626 bytes --]

From: Swen Schillig <swen@vnet.ibm.com>

Code cleanup for the zfcp_fsf.c file.

Signed-off-by: Swen Schillig <swen@vnet.ibm.com>
Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com>
---
 drivers/s390/scsi/zfcp_aux.c  |    4 
 drivers/s390/scsi/zfcp_dbf.c  |    2 
 drivers/s390/scsi/zfcp_def.h  |   31 
 drivers/s390/scsi/zfcp_ext.h  |   12 
 drivers/s390/scsi/zfcp_fc.c   |   11 
 drivers/s390/scsi/zfcp_fsf.c  | 4137 +++++++++++++++---------------------------
 drivers/s390/scsi/zfcp_fsf.h  |   31 
 drivers/s390/scsi/zfcp_qdio.c |    6 
 drivers/s390/scsi/zfcp_scsi.c |    5 
 9 files changed, 1586 insertions(+), 2653 deletions(-)

--- a/drivers/s390/scsi/zfcp_fsf.c	2008-06-30 11:27:23.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_fsf.c	2008-06-30 11:28:20.000000000 +0200
@@ -8,35 +8,6 @@
 
 #include "zfcp_ext.h"
 
-static int zfcp_fsf_exchange_config_data_handler(struct zfcp_fsf_req *);
-static void zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *);
-static int zfcp_fsf_open_port_handler(struct zfcp_fsf_req *);
-static int zfcp_fsf_close_port_handler(struct zfcp_fsf_req *);
-static int zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *);
-static int zfcp_fsf_open_unit_handler(struct zfcp_fsf_req *);
-static int zfcp_fsf_close_unit_handler(struct zfcp_fsf_req *);
-static int zfcp_fsf_send_fcp_command_handler(struct zfcp_fsf_req *);
-static int zfcp_fsf_send_fcp_command_task_handler(struct zfcp_fsf_req *);
-static int zfcp_fsf_send_fcp_command_task_management_handler(
-	struct zfcp_fsf_req *);
-static int zfcp_fsf_abort_fcp_command_handler(struct zfcp_fsf_req *);
-static int zfcp_fsf_status_read_handler(struct zfcp_fsf_req *);
-static int zfcp_fsf_send_ct_handler(struct zfcp_fsf_req *);
-static int zfcp_fsf_send_els_handler(struct zfcp_fsf_req *);
-static void zfcp_fsf_control_file_handler(struct zfcp_fsf_req *);
-static inline int zfcp_fsf_req_sbal_check(
-	unsigned long *, struct zfcp_qdio_queue *, int);
-static inline int zfcp_use_one_sbal(
-	struct scatterlist *, int, struct scatterlist *, int);
-static struct zfcp_fsf_req *zfcp_fsf_req_alloc(mempool_t *, int);
-static int zfcp_fsf_req_send(struct zfcp_fsf_req *);
-static int zfcp_fsf_protstatus_eval(struct zfcp_fsf_req *);
-static int zfcp_fsf_fsfstatus_eval(struct zfcp_fsf_req *);
-static int zfcp_fsf_fsfstatus_qual_eval(struct zfcp_fsf_req *);
-static void zfcp_fsf_link_down_info_eval(struct zfcp_fsf_req *, u8,
-	struct fsf_link_down_info *);
-static int zfcp_fsf_req_dispatch(struct zfcp_fsf_req *);
-
 /* association between FSF command and FSF QTCB type */
 static u32 fsf_qtcb_type[] = {
 	[FSF_QTCB_FCP_CMND] =             FSF_IO_COMMAND,
@@ -54,21 +25,19 @@ static u32 fsf_qtcb_type[] = {
 	[FSF_QTCB_UPLOAD_CONTROL_FILE] =  FSF_SUPPORT_COMMAND
 };
 
-static const char zfcp_act_subtable_type[5][8] = {
+static const char *zfcp_act_subtable_type[] = {
 	"unknown", "OS", "WWPN", "DID", "LUN"
 };
 
 static void zfcp_act_eval_err(struct zfcp_adapter *adapter, u32 table)
 {
-	u16 subtable = (table & 0xffff0000) >> 16;
+	u16 subtable = table >> 16;
 	u16 rule = table & 0xffff;
 
-	if (subtable > 0 &&
-	    subtable < ARRAY_SIZE(zfcp_act_subtable_type)) {
+	if (subtable && subtable < ARRAY_SIZE(zfcp_act_subtable_type))
 		dev_warn(&adapter->ccw_device->dev,
 			 "Access denied in subtable %s, rule %d.\n",
 			 zfcp_act_subtable_type[subtable], rule);
-	}
 }
 
 static void zfcp_fsf_access_denied_port(struct zfcp_fsf_req *req,
@@ -106,90 +75,27 @@ static void zfcp_fsf_class_not_supp(stru
 	req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 }
 
-/****************************************************************/
-/*************** FSF related Functions  *************************/
-/****************************************************************/
-
-/*
- * function:	zfcp_fsf_req_alloc
- *
- * purpose:     Obtains an fsf_req and potentially a qtcb (for all but
- *              unsolicited requests) via helper functions
- *              Does some initial fsf request set-up.
- *
- * returns:	pointer to allocated fsf_req if successfull
- *              NULL otherwise
- *
- * locks:       none
- *
- */
-static struct zfcp_fsf_req *
-zfcp_fsf_req_alloc(mempool_t *pool, int req_flags)
-{
-	size_t size;
-	void *ptr;
-	struct zfcp_fsf_req *fsf_req = NULL;
-
-	if (req_flags & ZFCP_REQ_NO_QTCB)
-		size = sizeof(struct zfcp_fsf_req);
-	else
-		size = sizeof(struct zfcp_fsf_req_qtcb);
-
-	if (likely(pool))
-		ptr = mempool_alloc(pool, GFP_ATOMIC);
-	else {
-		if (req_flags & ZFCP_REQ_NO_QTCB)
-			ptr = kmalloc(size, GFP_ATOMIC);
-		else
-			ptr = kmem_cache_alloc(zfcp_data.fsf_req_qtcb_cache,
-					       GFP_ATOMIC);
-	}
-
-	if (unlikely(!ptr))
-		goto out;
-
-	memset(ptr, 0, size);
-
-	if (req_flags & ZFCP_REQ_NO_QTCB) {
-		fsf_req = (struct zfcp_fsf_req *) ptr;
-	} else {
-		fsf_req = &((struct zfcp_fsf_req_qtcb *) ptr)->fsf_req;
-		fsf_req->qtcb =	&((struct zfcp_fsf_req_qtcb *) ptr)->qtcb;
-	}
-
-	fsf_req->pool = pool;
-
- out:
-	return fsf_req;
-}
-
-/*
- * function:	zfcp_fsf_req_free
- *
- * purpose:     Frees the memory of an fsf_req (and potentially a qtcb) or
- *              returns it into the pool via helper functions.
- *
- * returns:     sod all
- *
- * locks:       none
+/**
+ * zfcp_fsf_req_free - free memory used by fsf request
+ * @fsf_req: pointer to struct zfcp_fsf_req
  */
-void
-zfcp_fsf_req_free(struct zfcp_fsf_req *fsf_req)
+void zfcp_fsf_req_free(struct zfcp_fsf_req *req)
 {
-	if (likely(fsf_req->pool)) {
-		mempool_free(fsf_req, fsf_req->pool);
+	if (likely(req->pool)) {
+		mempool_free(req, req->pool);
 		return;
 	}
 
-	if (fsf_req->qtcb) {
-		kmem_cache_free(zfcp_data.fsf_req_qtcb_cache, fsf_req);
+	if (req->qtcb) {
+		kmem_cache_free(zfcp_data.fsf_req_qtcb_cache, req);
 		return;
 	}
-
-	kfree(fsf_req);
 }
 
-/*
+/**
+ * zfcp_fsf_req_dismiss_all - dismiss all fsf requests
+ * @adapter: pointer to struct zfcp_adapter
+ *
  * Never ever call this without shutting down the adapter first.
  * Otherwise the adapter would continue using and corrupting s390 storage.
  * Included BUG_ON() call to ensure this is done.
@@ -197,1815 +103,1359 @@ zfcp_fsf_req_free(struct zfcp_fsf_req *f
  */
 void zfcp_fsf_req_dismiss_all(struct zfcp_adapter *adapter)
 {
-	struct zfcp_fsf_req *fsf_req, *tmp;
+	struct zfcp_fsf_req *req, *tmp;
 	unsigned long flags;
 	LIST_HEAD(remove_queue);
 	unsigned int i;
 
-	BUG_ON(atomic_test_mask(ZFCP_STATUS_ADAPTER_QDIOUP, &adapter->status));
+	BUG_ON(atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_QDIOUP);
 	spin_lock_irqsave(&adapter->req_list_lock, flags);
 	for (i = 0; i < REQUEST_LIST_SIZE; i++)
 		list_splice_init(&adapter->req_list[i], &remove_queue);
 	spin_unlock_irqrestore(&adapter->req_list_lock, flags);
 
-	list_for_each_entry_safe(fsf_req, tmp, &remove_queue, list) {
-		list_del(&fsf_req->list);
-		fsf_req->status |= ZFCP_STATUS_FSFREQ_DISMISSED;
-		zfcp_fsf_req_complete(fsf_req);
-	}
-}
-
-/*
- * function:    zfcp_fsf_req_complete
- *
- * purpose:	Updates active counts and timers for openfcp-reqs
- *              May cleanup request after req_eval returns
- *
- * returns:	0 - success
- *		!0 - failure
- *
- * context:
- */
-int
-zfcp_fsf_req_complete(struct zfcp_fsf_req *fsf_req)
-{
-	int retval = 0;
-	int cleanup;
-
-	if (unlikely(fsf_req->fsf_command == FSF_QTCB_UNSOLICITED_STATUS)) {
-		/*
-		 * Note: all cleanup handling is done in the callchain of
-		 * the function call-chain below.
-		 */
-		zfcp_fsf_status_read_handler(fsf_req);
-		goto out;
-	} else {
-		del_timer(&fsf_req->timer);
-		zfcp_fsf_protstatus_eval(fsf_req);
-	}
-
-	/*
-	 * fsf_req may be deleted due to waking up functions, so
-	 * cleanup is saved here and used later
-	 */
-	if (likely(fsf_req->status & ZFCP_STATUS_FSFREQ_CLEANUP))
-		cleanup = 1;
-	else
-		cleanup = 0;
-
-	fsf_req->status |= ZFCP_STATUS_FSFREQ_COMPLETED;
-
-	/* cleanup request if requested by initiator */
-	if (likely(cleanup)) {
-		/*
-		 * lock must not be held here since it will be
-		 * grabed by the called routine, too
-		 */
-		zfcp_fsf_req_free(fsf_req);
-	} else {
-		/* notify initiator waiting for the requests completion */
-		/*
-		 * FIXME: Race! We must not access fsf_req here as it might have been
-		 * cleaned up already due to the set ZFCP_STATUS_FSFREQ_COMPLETED
-		 * flag. It's an improbable case. But, we have the same paranoia for
-		 * the cleanup flag already.
-		 * Might better be handled using complete()?
-		 * (setting the flag and doing wakeup ought to be atomic
-		 *  with regard to checking the flag as long as waitqueue is
-		 *  part of the to be released structure)
-		 */
-		wake_up(&fsf_req->completion_wq);
-	}
-
- out:
-	return retval;
-}
-
-/*
- * function:    zfcp_fsf_protstatus_eval
- *
- * purpose:	evaluates the QTCB of the finished FSF request
- *		and initiates appropriate actions
- *		(usually calling FSF command specific handlers)
- *
- * returns:
- *
- * context:
- *
- * locks:
- */
-static int
-zfcp_fsf_protstatus_eval(struct zfcp_fsf_req *fsf_req)
-{
-	int retval = 0;
-	struct zfcp_adapter *adapter = fsf_req->adapter;
-	struct fsf_qtcb *qtcb = fsf_req->qtcb;
-	union fsf_prot_status_qual *prot_status_qual =
-		&qtcb->prefix.prot_status_qual;
-
-	zfcp_hba_dbf_event_fsf_response(fsf_req);
-
-	if (fsf_req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
-		fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR |
-			ZFCP_STATUS_FSFREQ_RETRY; /* only for SCSI cmnds. */
-		goto skip_protstatus;
-	}
-
-	/* evaluate FSF Protocol Status */
-	switch (qtcb->prefix.prot_status) {
-
-	case FSF_PROT_GOOD:
-	case FSF_PROT_FSF_STATUS_PRESENTED:
-		break;
-
-	case FSF_PROT_QTCB_VERSION_ERROR:
-		dev_err(&adapter->ccw_device->dev,
-			"The QTCB version requested by zfcp (0x%x) is not "
-			"supported by the FCP adapter (lowest supported 0x%x, "
-			"highest supported 0x%x).\n",
-			ZFCP_QTCB_VERSION, prot_status_qual->word[0],
-			prot_status_qual->word[1]);
-		zfcp_erp_adapter_shutdown(adapter, 0, 117, fsf_req);
-		fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
-		break;
-
-	case FSF_PROT_SEQ_NUMB_ERROR:
-		zfcp_erp_adapter_reopen(adapter, 0, 98, fsf_req);
-		fsf_req->status |= ZFCP_STATUS_FSFREQ_RETRY;
-		fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
-		break;
-
-	case FSF_PROT_UNSUPP_QTCB_TYPE:
-		dev_err(&adapter->ccw_device->dev,
-			"Packet header type used by the device driver is "
-			"incompatible with that used on the adapter.\n");
-		zfcp_erp_adapter_shutdown(adapter, 0, 118, fsf_req);
-		fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
-		break;
-
-	case FSF_PROT_HOST_CONNECTION_INITIALIZING:
-		fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
-		atomic_set_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT,
-				&(adapter->status));
-		break;
-
-	case FSF_PROT_DUPLICATE_REQUEST_ID:
-		dev_err(&adapter->ccw_device->dev,
-			"The request identifier 0x%Lx is ambiguous.\n",
-			(unsigned long long)qtcb->bottom.support.req_handle);
-		zfcp_erp_adapter_shutdown(adapter, 0, 78, fsf_req);
-		fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
-		break;
-
-	case FSF_PROT_LINK_DOWN:
-		zfcp_fsf_link_down_info_eval(fsf_req, 37,
-					     &prot_status_qual->link_down_info);
-		/* FIXME: reopening adapter now? better wait for link up */
-		zfcp_erp_adapter_reopen(adapter, 0, 79, fsf_req);
-		fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
-		break;
-
-	case FSF_PROT_REEST_QUEUE:
-		/* All ports should be marked as ready to run again */
-		zfcp_erp_modify_adapter_status(adapter, 28, NULL,
-					       ZFCP_STATUS_COMMON_RUNNING,
-					       ZFCP_SET);
-		zfcp_erp_adapter_reopen(adapter,
-					ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED
-					| ZFCP_STATUS_COMMON_ERP_FAILED,
-					99, fsf_req);
-		fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
-		break;
-
-	case FSF_PROT_ERROR_STATE:
-		zfcp_erp_adapter_reopen(adapter, 0, 100, fsf_req);
-		fsf_req->status |= ZFCP_STATUS_FSFREQ_RETRY;
-		fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
-		break;
-
-	default:
-		dev_err(&adapter->ccw_device->dev,
-			"Transfer protocol status information"
-			"provided by the adapter (0x%x) "
-			"is not compatible with the device driver.\n",
-			qtcb->prefix.prot_status);
-		zfcp_erp_adapter_shutdown(adapter, 0, 119, fsf_req);
-		fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
+	list_for_each_entry_safe(req, tmp, &remove_queue, list) {
+		list_del(&req->list);
+		req->status |= ZFCP_STATUS_FSFREQ_DISMISSED;
+		zfcp_fsf_req_complete(req);
 	}
-
- skip_protstatus:
-	/*
-	 * always call specific handlers to give them a chance to do
-	 * something meaningful even in error cases
-	 */
-	zfcp_fsf_fsfstatus_eval(fsf_req);
-	return retval;
 }
 
-/*
- * function:	zfcp_fsf_fsfstatus_eval
- *
- * purpose:	evaluates FSF status of completed FSF request
- *		and acts accordingly
- *
- * returns:
- */
-static int
-zfcp_fsf_fsfstatus_eval(struct zfcp_fsf_req *fsf_req)
+static void zfcp_fsf_status_read_port_closed(struct zfcp_fsf_req *req)
 {
-	int retval = 0;
-
-	if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
-		goto skip_fsfstatus;
-	}
-
-	/* evaluate FSF Status */
-	switch (fsf_req->qtcb->header.fsf_status) {
-	case FSF_UNKNOWN_COMMAND:
-		dev_err(&fsf_req->adapter->ccw_device->dev,
-			"Command issued by the device driver (0x%x) is "
-			"not known by the adapter.\n",
-			fsf_req->qtcb->header.fsf_command);
-		zfcp_erp_adapter_shutdown(fsf_req->adapter, 0, 120, fsf_req);
-		fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
-		break;
-
-	case FSF_ADAPTER_STATUS_AVAILABLE:
-		zfcp_fsf_fsfstatus_qual_eval(fsf_req);
-		break;
-	}
-
- skip_fsfstatus:
-	/*
-	 * always call specific handlers to give them a chance to do
-	 * something meaningful even in error cases
-	 */
-	zfcp_fsf_req_dispatch(fsf_req);
+	struct fsf_status_read_buffer *sr_buf = req->data;
+	struct zfcp_adapter *adapter = req->adapter;
+	struct zfcp_port *port;
+	int d_id = sr_buf->d_id & ZFCP_DID_MASK;
+	unsigned long flags;
 
-	return retval;
+	read_lock_irqsave(&zfcp_data.config_lock, flags);
+	list_for_each_entry(port, &adapter->port_list_head, list)
+		if (port->d_id == d_id) {
+			read_unlock_irqrestore(&zfcp_data.config_lock, flags);
+			switch (sr_buf->status_subtype) {
+			case FSF_STATUS_READ_SUB_CLOSE_PHYS_PORT:
+				zfcp_erp_port_reopen(port, 0, 101, req);
+				break;
+			case FSF_STATUS_READ_SUB_ERROR_PORT:
+				zfcp_erp_port_shutdown(port, 0, 122, req);
+				break;
+			}
+			return;
+		}
+	read_unlock_irqrestore(&zfcp_data.config_lock, flags);
 }
 
-/*
- * function:	zfcp_fsf_fsfstatus_qual_eval
- *
- * purpose:	evaluates FSF status-qualifier of completed FSF request
- *		and acts accordingly
- *
- * returns:
- */
-static int
-zfcp_fsf_fsfstatus_qual_eval(struct zfcp_fsf_req *fsf_req)
+static void zfcp_fsf_bit_error_threshold(struct zfcp_fsf_req *req)
 {
-	int retval = 0;
-
-	switch (fsf_req->qtcb->header.fsf_status_qual.word[0]) {
-	case FSF_SQ_FCP_RSP_AVAILABLE:
-		break;
-	case FSF_SQ_RETRY_IF_POSSIBLE:
-		/* The SCSI-stack may now issue retries or escalate */
-		fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
-		break;
-	case FSF_SQ_COMMAND_ABORTED:
-		/* Carry the aborted state on to upper layer */
-		fsf_req->status |= ZFCP_STATUS_FSFREQ_ABORTED;
-		fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
-		break;
-	case FSF_SQ_NO_RECOM:
-		dev_err(&fsf_req->adapter->ccw_device->dev,
-			"No recommendation could be given for a "
-			"problem on the adapter.\n");
-		zfcp_erp_adapter_shutdown(fsf_req->adapter, 0, 121, fsf_req);
-		fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
-		break;
-	case FSF_SQ_ULP_PROGRAMMING_ERROR:
-		fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
-		break;
-	case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
-	case FSF_SQ_NO_RETRY_POSSIBLE:
-	case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
-		/* dealt with in the respective functions */
-		break;
-	default:
-		fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
-		break;
-	}
+	struct zfcp_adapter *adapter = req->adapter;
+	struct fsf_status_read_buffer *sr_buf = req->data;
+	struct fsf_bit_error_payload *err = &sr_buf->payload.bit_error;
 
-	return retval;
+	dev_warn(&adapter->ccw_device->dev,
+		 "Warning: bit error threshold data "
+		 "received for the adapter: "
+		 "link failures = %i, loss of sync errors = %i, "
+		 "loss of signal errors = %i, "
+		 "primitive sequence errors = %i, "
+		 "invalid transmission word errors = %i, "
+		 "CRC errors = %i).\n",
+		 err->link_failure_error_count,
+		 err->loss_of_sync_error_count,
+		 err->loss_of_signal_error_count,
+		 err->primitive_sequence_error_count,
+		 err->invalid_transmission_word_error_count,
+		 err->crc_error_count);
+	dev_warn(&adapter->ccw_device->dev,
+		 "Additional bit error threshold data of the adapter: "
+		 "primitive sequence event time-outs = %i, "
+		 "elastic buffer overrun errors = %i, "
+		 "advertised receive buffer-to-buffer credit = %i, "
+		 "current receice buffer-to-buffer credit = %i, "
+		 "advertised transmit buffer-to-buffer credit = %i, "
+		 "current transmit buffer-to-buffer credit = %i).\n",
+		 err->primitive_sequence_event_timeout_count,
+		 err->elastic_buffer_overrun_error_count,
+		 err->advertised_receive_b2b_credit,
+		 err->current_receive_b2b_credit,
+		 err->advertised_transmit_b2b_credit,
+		 err->current_transmit_b2b_credit);
 }
 
-/**
- * zfcp_fsf_link_down_info_eval - evaluate link down information block
- */
-static void
-zfcp_fsf_link_down_info_eval(struct zfcp_fsf_req *fsf_req, u8 id,
-			     struct fsf_link_down_info *link_down)
+static void zfcp_fsf_link_down_info_eval(struct zfcp_fsf_req *req, u8 id,
+					 struct fsf_link_down_info *link_down)
 {
-	struct zfcp_adapter *adapter = fsf_req->adapter;
+	struct zfcp_adapter *adapter = req->adapter;
 
-	if (atomic_test_mask(ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED,
-	                     &adapter->status))
+	if (atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED)
 		return;
 
 	atomic_set_mask(ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED, &adapter->status);
 
-	if (link_down == NULL)
+	if (!link_down)
 		goto out;
 
 	switch (link_down->error_code) {
 	case FSF_PSQ_LINK_NO_LIGHT:
-		dev_warn(&fsf_req->adapter->ccw_device->dev,
-			 "The local link is down: "
-			 "no light detected.\n");
+		dev_warn(&req->adapter->ccw_device->dev,
+			 "The local link is down: no light detected.\n");
 		break;
 	case FSF_PSQ_LINK_WRAP_PLUG:
-		dev_warn(&fsf_req->adapter->ccw_device->dev,
-			 "The local link is down: "
-			 "wrap plug detected.\n");
+		dev_warn(&req->adapter->ccw_device->dev,
+			 "The local link is down: wrap plug detected.\n");
 		break;
 	case FSF_PSQ_LINK_NO_FCP:
-		dev_warn(&fsf_req->adapter->ccw_device->dev,
+		dev_warn(&req->adapter->ccw_device->dev,
 			 "The local link is down: "
 			 "adjacent node on link does not support FCP.\n");
 		break;
 	case FSF_PSQ_LINK_FIRMWARE_UPDATE:
-		dev_warn(&fsf_req->adapter->ccw_device->dev,
+		dev_warn(&req->adapter->ccw_device->dev,
 			 "The local link is down: "
 			 "firmware update in progress.\n");
 		break;
 	case FSF_PSQ_LINK_INVALID_WWPN:
-		dev_warn(&fsf_req->adapter->ccw_device->dev,
+		dev_warn(&req->adapter->ccw_device->dev,
 			 "The local link is down: "
 			 "duplicate or invalid WWPN detected.\n");
 		break;
 	case FSF_PSQ_LINK_NO_NPIV_SUPPORT:
-		dev_warn(&fsf_req->adapter->ccw_device->dev,
+		dev_warn(&req->adapter->ccw_device->dev,
 			 "The local link is down: "
 			 "no support for NPIV by Fabric.\n");
 		break;
 	case FSF_PSQ_LINK_NO_FCP_RESOURCES:
-		dev_warn(&fsf_req->adapter->ccw_device->dev,
+		dev_warn(&req->adapter->ccw_device->dev,
 			 "The local link is down: "
 			 "out of resource in FCP daughtercard.\n");
 		break;
 	case FSF_PSQ_LINK_NO_FABRIC_RESOURCES:
-		dev_warn(&fsf_req->adapter->ccw_device->dev,
+		dev_warn(&req->adapter->ccw_device->dev,
 			 "The local link is down: "
 			 "out of resource in Fabric.\n");
 		break;
 	case FSF_PSQ_LINK_FABRIC_LOGIN_UNABLE:
-		dev_warn(&fsf_req->adapter->ccw_device->dev,
+		dev_warn(&req->adapter->ccw_device->dev,
 			 "The local link is down: "
 			 "unable to login to Fabric.\n");
 		break;
 	case FSF_PSQ_LINK_WWPN_ASSIGNMENT_CORRUPTED:
-		dev_warn(&fsf_req->adapter->ccw_device->dev,
+		dev_warn(&req->adapter->ccw_device->dev,
 			 "WWPN assignment file corrupted on adapter.\n");
 		break;
 	case FSF_PSQ_LINK_MODE_TABLE_CURRUPTED:
-		dev_warn(&fsf_req->adapter->ccw_device->dev,
+		dev_warn(&req->adapter->ccw_device->dev,
 			 "Mode table corrupted on adapter.\n");
 		break;
 	case FSF_PSQ_LINK_NO_WWPN_ASSIGNMENT:
-		dev_warn(&fsf_req->adapter->ccw_device->dev,
+		dev_warn(&req->adapter->ccw_device->dev,
 			 "No WWPN for assignment table on adapter.\n");
 		break;
 	default:
-		dev_warn(&fsf_req->adapter->ccw_device->dev,
+		dev_warn(&req->adapter->ccw_device->dev,
 			 "The local link to adapter is down.\n");
 	}
-
- out:
-	zfcp_erp_adapter_failed(adapter, id, fsf_req);
+out:
+	zfcp_erp_adapter_failed(adapter, id, req);
 }
 
-/*
- * function:	zfcp_fsf_req_dispatch
- *
- * purpose:	calls the appropriate command specific handler
- *
- * returns:
- */
-static int
-zfcp_fsf_req_dispatch(struct zfcp_fsf_req *fsf_req)
+static void zfcp_fsf_status_read_link_down(struct zfcp_fsf_req *req)
 {
-	struct zfcp_erp_action *erp_action = fsf_req->erp_action;
-	int retval = 0;
-
-
-	switch (fsf_req->fsf_command) {
+	struct zfcp_adapter *adapter = req->adapter;
+	struct fsf_status_read_buffer *sr_buf = req->data;
+	struct fsf_link_down_info *ldi =
+		(struct fsf_link_down_info *) &sr_buf->payload;
 
-	case FSF_QTCB_FCP_CMND:
-		zfcp_fsf_send_fcp_command_handler(fsf_req);
+	switch (sr_buf->status_subtype) {
+	case FSF_STATUS_READ_SUB_NO_PHYSICAL_LINK:
+		dev_warn(&adapter->ccw_device->dev,
+			 "Physical link is down.\n");
+		zfcp_fsf_link_down_info_eval(req, 38, ldi);
 		break;
-
-	case FSF_QTCB_ABORT_FCP_CMND:
-		zfcp_fsf_abort_fcp_command_handler(fsf_req);
+	case FSF_STATUS_READ_SUB_FDISC_FAILED:
+		dev_warn(&adapter->ccw_device->dev,
+			 "Local link is down "
+			 "due to failed FDISC login.\n");
+		zfcp_fsf_link_down_info_eval(req, 39, ldi);
 		break;
+	case FSF_STATUS_READ_SUB_FIRMWARE_UPDATE:
+		dev_warn(&adapter->ccw_device->dev,
+			 "Local link is down "
+			 "due to firmware update on adapter.\n");
+		zfcp_fsf_link_down_info_eval(req, 40, NULL);
+	};
+}
 
-	case FSF_QTCB_SEND_GENERIC:
-		zfcp_fsf_send_ct_handler(fsf_req);
-		break;
+static void zfcp_fsf_status_read_handler(struct zfcp_fsf_req *req)
+{
+	struct zfcp_adapter *adapter = req->adapter;
+	struct fsf_status_read_buffer *sr_buf = req->data;
 
-	case FSF_QTCB_OPEN_PORT_WITH_DID:
-		zfcp_fsf_open_port_handler(fsf_req);
-		break;
+	if (req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
+		zfcp_hba_dbf_event_fsf_unsol("dism", adapter, sr_buf);
+		mempool_free(sr_buf, adapter->pool.data_status_read);
+		zfcp_fsf_req_free(req);
+		return;
+	}
 
-	case FSF_QTCB_OPEN_LUN:
-		zfcp_fsf_open_unit_handler(fsf_req);
-		break;
+	zfcp_hba_dbf_event_fsf_unsol("read", adapter, sr_buf);
 
-	case FSF_QTCB_CLOSE_LUN:
-		zfcp_fsf_close_unit_handler(fsf_req);
+	switch (sr_buf->status_type) {
+	case FSF_STATUS_READ_PORT_CLOSED:
+		zfcp_fsf_status_read_port_closed(req);
 		break;
-
-	case FSF_QTCB_CLOSE_PORT:
-		zfcp_fsf_close_port_handler(fsf_req);
+	case FSF_STATUS_READ_INCOMING_ELS:
+		zfcp_fc_incoming_els(req);
 		break;
-
-	case FSF_QTCB_CLOSE_PHYSICAL_PORT:
-		zfcp_fsf_close_physical_port_handler(fsf_req);
+	case FSF_STATUS_READ_SENSE_DATA_AVAIL:
 		break;
-
-	case FSF_QTCB_EXCHANGE_CONFIG_DATA:
-		zfcp_fsf_exchange_config_data_handler(fsf_req);
+	case FSF_STATUS_READ_BIT_ERROR_THRESHOLD:
+		zfcp_fsf_bit_error_threshold(req);
 		break;
-
-	case FSF_QTCB_EXCHANGE_PORT_DATA:
-		zfcp_fsf_exchange_port_data_handler(fsf_req);
+	case FSF_STATUS_READ_LINK_DOWN:
+		zfcp_fsf_status_read_link_down(req);
 		break;
-
-	case FSF_QTCB_SEND_ELS:
-		zfcp_fsf_send_els_handler(fsf_req);
+	case FSF_STATUS_READ_LINK_UP:
+		dev_info(&adapter->ccw_device->dev,
+			 "Local link was replugged.\n");
+		/* All ports should be marked as ready to run again */
+		zfcp_erp_modify_adapter_status(adapter, 30, NULL,
+					       ZFCP_STATUS_COMMON_RUNNING,
+					       ZFCP_SET);
+		zfcp_erp_adapter_reopen(adapter,
+					ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED |
+					ZFCP_STATUS_COMMON_ERP_FAILED,
+					102, req);
 		break;
-
-	case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
-		zfcp_fsf_control_file_handler(fsf_req);
+	case FSF_STATUS_READ_NOTIFICATION_LOST:
+		if (sr_buf->status_subtype & FSF_STATUS_READ_SUB_ACT_UPDATED)
+			zfcp_erp_adapter_access_changed(adapter, 135, req);
+		if (sr_buf->status_subtype & FSF_STATUS_READ_SUB_INCOMING_ELS)
+			schedule_work(&adapter->scan_work);
 		break;
-
-	case FSF_QTCB_UPLOAD_CONTROL_FILE:
-		zfcp_fsf_control_file_handler(fsf_req);
+	case FSF_STATUS_READ_CFDC_UPDATED:
+		zfcp_erp_adapter_access_changed(adapter, 136, req);
+		break;
+	case FSF_STATUS_READ_FEATURE_UPDATE_ALERT:
+		adapter->adapter_features = sr_buf->payload.word[0];
 		break;
 	}
 
-	if (!erp_action)
-		return retval;
+	mempool_free(sr_buf, adapter->pool.data_status_read);
+	zfcp_fsf_req_free(req);
 
-	zfcp_erp_async_handler(erp_action, 0);
+	atomic_inc(&adapter->stat_miss);
+	schedule_work(&adapter->stat_work);
+}
 
-	return retval;
+static void zfcp_fsf_fsfstatus_qual_eval(struct zfcp_fsf_req *req)
+{
+	switch (req->qtcb->header.fsf_status_qual.word[0]) {
+	case FSF_SQ_FCP_RSP_AVAILABLE:
+	case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
+	case FSF_SQ_NO_RETRY_POSSIBLE:
+	case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
+		return;
+	case FSF_SQ_COMMAND_ABORTED:
+		req->status |= ZFCP_STATUS_FSFREQ_ABORTED;
+		break;
+	case FSF_SQ_NO_RECOM:
+		dev_err(&req->adapter->ccw_device->dev,
+			"No recommendation could be given for a "
+			"problem on the adapter.\n");
+		zfcp_erp_adapter_shutdown(req->adapter, 0, 121, req);
+		break;
+	}
+	/* all non-return stats set FSFREQ_ERROR*/
+	req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 }
 
-/*
- * function:    zfcp_fsf_status_read
- *
- * purpose:	initiates a Status Read command at the specified adapter
- *
- * returns:
- */
-int
-zfcp_fsf_status_read(struct zfcp_adapter *adapter, int req_flags)
+static void zfcp_fsf_fsfstatus_eval(struct zfcp_fsf_req *req)
 {
-	struct zfcp_fsf_req *fsf_req;
-	struct fsf_status_read_buffer *status_buffer;
-	unsigned long lock_flags;
-	volatile struct qdio_buffer_element *sbale;
-	int retval;
+	if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR))
+		return;
 
-	/* setup new FSF request */
-	retval = zfcp_fsf_req_create(adapter, FSF_QTCB_UNSOLICITED_STATUS,
-				     req_flags | ZFCP_REQ_NO_QTCB,
-				     adapter->pool.fsf_req_status_read,
-				     &lock_flags, &fsf_req);
-	if (retval < 0)
-		goto failed_req_create;
-
-	sbale = zfcp_qdio_sbale_req(fsf_req);
-        sbale[0].flags |= SBAL_FLAGS0_TYPE_STATUS;
-        sbale[2].flags |= SBAL_FLAGS_LAST_ENTRY;
-        fsf_req->sbale_curr = 2;
-
-	retval = -ENOMEM;
-	status_buffer =
-		mempool_alloc(adapter->pool.data_status_read, GFP_ATOMIC);
-	if (!status_buffer)
-		goto failed_buf;
-	memset(status_buffer, 0, sizeof (struct fsf_status_read_buffer));
-	fsf_req->data = (unsigned long) status_buffer;
+	switch (req->qtcb->header.fsf_status) {
+	case FSF_UNKNOWN_COMMAND:
+		dev_err(&req->adapter->ccw_device->dev,
+			"Command issued by the device driver (0x%x) is "
+			"not known by the adapter.\n",
+			req->qtcb->header.fsf_command);
+		zfcp_erp_adapter_shutdown(req->adapter, 0, 120, req);
+		req->status |= ZFCP_STATUS_FSFREQ_ERROR;
+		break;
+	case FSF_ADAPTER_STATUS_AVAILABLE:
+		zfcp_fsf_fsfstatus_qual_eval(req);
+		break;
+	}
+}
 
-	/* insert pointer to respective buffer */
-	sbale = zfcp_qdio_sbale_curr(fsf_req);
-	sbale->addr = (void *) status_buffer;
-	sbale->length = sizeof(struct fsf_status_read_buffer);
+static void zfcp_fsf_protstatus_eval(struct zfcp_fsf_req *req)
+{
+	struct zfcp_adapter *adapter = req->adapter;
+	struct fsf_qtcb *qtcb = req->qtcb;
+	union fsf_prot_status_qual *psq = &qtcb->prefix.prot_status_qual;
 
-	retval = zfcp_fsf_req_send(fsf_req);
-	if (retval)
-		goto failed_req_send;
+	zfcp_hba_dbf_event_fsf_response(req);
 
-	goto out;
+	if (req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
+		req->status |= ZFCP_STATUS_FSFREQ_ERROR |
+			ZFCP_STATUS_FSFREQ_RETRY; /* only for SCSI cmnds. */
+		return;
+	}
+
+	switch (qtcb->prefix.prot_status) {
+	case FSF_PROT_GOOD:
+	case FSF_PROT_FSF_STATUS_PRESENTED:
+		return;
+	case FSF_PROT_QTCB_VERSION_ERROR:
+		dev_err(&adapter->ccw_device->dev,
+			"The QTCB version requested by zfcp (0x%x) is not "
+			"supported by the FCP adapter (lowest supported "
+			"0x%x, highest supported 0x%x).\n",
+			FSF_QTCB_CURRENT_VERSION, psq->word[0],
+			psq->word[1]);
+		zfcp_erp_adapter_shutdown(adapter, 0, 117, req);
+		break;
+	case FSF_PROT_ERROR_STATE:
+	case FSF_PROT_SEQ_NUMB_ERROR:
+		zfcp_erp_adapter_reopen(adapter, 0, 98, req);
+		req->status |= ZFCP_STATUS_FSFREQ_RETRY;
+		break;
+	case FSF_PROT_UNSUPP_QTCB_TYPE:
+		dev_err(&adapter->ccw_device->dev,
+			"Packet header type used by the device driver is "
+			"incompatible with that used on the adapter.\n");
+		zfcp_erp_adapter_shutdown(adapter, 0, 118, req);
+		break;
+	case FSF_PROT_HOST_CONNECTION_INITIALIZING:
+		atomic_set_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT,
+				&adapter->status);
+		break;
+	case FSF_PROT_DUPLICATE_REQUEST_ID:
+		dev_err(&adapter->ccw_device->dev,
+			"The request identifier 0x%Lx is ambiguous.\n",
+			(unsigned long long)qtcb->bottom.support.req_handle);
+		zfcp_erp_adapter_shutdown(adapter, 0, 78, req);
+		break;
+	case FSF_PROT_LINK_DOWN:
+		zfcp_fsf_link_down_info_eval(req, 37, &psq->link_down_info);
+		/* FIXME: reopening adapter now? better wait for link up */
+		zfcp_erp_adapter_reopen(adapter, 0, 79, req);
+		break;
+	case FSF_PROT_REEST_QUEUE:
+		/* All ports should be marked as ready to run again */
+		zfcp_erp_modify_adapter_status(adapter, 28, NULL,
+					       ZFCP_STATUS_COMMON_RUNNING,
+					       ZFCP_SET);
+		zfcp_erp_adapter_reopen(adapter,
+					ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED |
+					ZFCP_STATUS_COMMON_ERP_FAILED, 99, req);
+		break;
+	default:
+		dev_err(&adapter->ccw_device->dev,
+			"Transfer protocol status information"
+			"provided by the adapter (0x%x) "
+			"is not compatible with the device driver.\n",
+			qtcb->prefix.prot_status);
+		zfcp_erp_adapter_shutdown(adapter, 0, 119, req);
+	}
+	req->status |= ZFCP_STATUS_FSFREQ_ERROR;
+}
 
- failed_req_send:
-	mempool_free(status_buffer, adapter->pool.data_status_read);
+/**
+ * zfcp_fsf_req_complete - process completion of a FSF request
+ * @fsf_req: The FSF request that has been completed.
+ *
+ * When a request has been completed either from the FCP adapter,
+ * or it has been dismissed due to a queue shutdown, this function
+ * is called to process the completion status and trigger further
+ * events related to the FSF request.
+ */
+void zfcp_fsf_req_complete(struct zfcp_fsf_req *req)
+{
+	if (unlikely(req->fsf_command == FSF_QTCB_UNSOLICITED_STATUS)) {
+		zfcp_fsf_status_read_handler(req);
+		return;
+	}
 
- failed_buf:
-	zfcp_fsf_req_free(fsf_req);
- failed_req_create:
-	zfcp_hba_dbf_event_fsf_unsol("fail", adapter, NULL);
- out:
-	write_unlock_irqrestore(&adapter->req_q.lock, lock_flags);
-	return retval;
+	del_timer(&req->timer);
+	zfcp_fsf_protstatus_eval(req);
+	zfcp_fsf_fsfstatus_eval(req);
+	req->handler(req);
+
+	if (req->erp_action)
+		zfcp_erp_async_handler(req->erp_action, 0);
+	req->status |= ZFCP_STATUS_FSFREQ_COMPLETED;
+
+	if (likely(req->status & ZFCP_STATUS_FSFREQ_CLEANUP))
+		zfcp_fsf_req_free(req);
+	else
+	/* notify initiator waiting for the requests completion */
+	/*
+	 * FIXME: Race! We must not access fsf_req here as it might have been
+	 * cleaned up already due to the set ZFCP_STATUS_FSFREQ_COMPLETED
+	 * flag. It's an improbable case. But, we have the same paranoia for
+	 * the cleanup flag already.
+	 * Might better be handled using complete()?
+	 * (setting the flag and doing wakeup ought to be atomic
+	 *  with regard to checking the flag as long as waitqueue is
+	 *  part of the to be released structure)
+	 */
+		wake_up(&req->completion_wq);
 }
 
-static int
-zfcp_fsf_status_read_port_closed(struct zfcp_fsf_req *fsf_req)
+static int zfcp_fsf_exchange_config_evaluate(struct zfcp_fsf_req *req)
 {
-	struct fsf_status_read_buffer *status_buffer;
-	struct zfcp_adapter *adapter;
-	struct zfcp_port *port;
-	unsigned long flags;
+	struct fsf_qtcb_bottom_config *bottom;
+	struct zfcp_adapter *adapter = req->adapter;
+	struct Scsi_Host *shost = adapter->scsi_host;
 
-	status_buffer = (struct fsf_status_read_buffer *) fsf_req->data;
-	adapter = fsf_req->adapter;
+	bottom = &req->qtcb->bottom.config;
 
-	read_lock_irqsave(&zfcp_data.config_lock, flags);
-	list_for_each_entry(port, &adapter->port_list_head, list)
-	    if (port->d_id == (status_buffer->d_id & ZFCP_DID_MASK))
-		break;
-	read_unlock_irqrestore(&zfcp_data.config_lock, flags);
+	if (req->data)
+		memcpy(req->data, bottom, sizeof(*bottom));
 
-	if (!port || (port->d_id != (status_buffer->d_id & ZFCP_DID_MASK)))
-		goto out;
+	fc_host_node_name(shost) = bottom->nport_serv_param.wwnn;
+	fc_host_port_name(shost) = bottom->nport_serv_param.wwpn;
+	fc_host_port_id(shost) = bottom->s_id & ZFCP_DID_MASK;
+	fc_host_speed(shost) = bottom->fc_link_speed;
+	fc_host_supported_classes(shost) = FC_COS_CLASS2 | FC_COS_CLASS3;
 
-	switch (status_buffer->status_subtype) {
+	adapter->hydra_version = bottom->adapter_type;
+	adapter->timer_ticks = bottom->timer_interval;
 
-	case FSF_STATUS_READ_SUB_CLOSE_PHYS_PORT:
-		zfcp_erp_port_reopen(port, 0, 101, fsf_req);
-		break;
+	if (fc_host_permanent_port_name(shost) == -1)
+		fc_host_permanent_port_name(shost) = fc_host_port_name(shost);
 
-	case FSF_STATUS_READ_SUB_ERROR_PORT:
-		zfcp_erp_port_shutdown(port, 0, 122, fsf_req);
+	switch (bottom->fc_topology) {
+	case FSF_TOPO_P2P:
+		adapter->peer_d_id = bottom->peer_d_id & ZFCP_DID_MASK;
+		adapter->peer_wwpn = bottom->plogi_payload.wwpn;
+		adapter->peer_wwnn = bottom->plogi_payload.wwnn;
+		fc_host_port_type(shost) = FC_PORTTYPE_PTP;
+		if (req->erp_action)
+			dev_info(&adapter->ccw_device->dev,
+				 "Point-to-Point fibrechannel "
+				 "configuration detected.\n");
+		break;
+	case FSF_TOPO_FABRIC:
+		fc_host_port_type(shost) = FC_PORTTYPE_NPORT;
+		if (req->erp_action)
+			dev_info(&adapter->ccw_device->dev,
+				 "Switched fabric fibrechannel "
+				 "network detected.\n");
 		break;
+	case FSF_TOPO_AL:
+		fc_host_port_type(shost) = FC_PORTTYPE_NLPORT;
+		dev_err(&adapter->ccw_device->dev,
+			"Unsupported arbitrated loop fibrechannel "
+			"topology detected, shutting down "
+			"adapter.\n");
+		zfcp_erp_adapter_shutdown(adapter, 0, 127, req);
+		return -EIO;
+	default:
+		fc_host_port_type(shost) = FC_PORTTYPE_UNKNOWN;
+		dev_err(&adapter->ccw_device->dev,
+			"The fibrechannel topology reported by the"
+			" adapter is not known by the zfcp driver,"
+			" shutting down adapter.\n");
+		zfcp_erp_adapter_shutdown(adapter, 0, 128, req);
+		return -EIO;
 	}
- out:
+
 	return 0;
 }
 
-static void zfcp_fsf_bit_error_threshold(struct zfcp_fsf_req *req)
+static void zfcp_fsf_exchange_config_data_handler(struct zfcp_fsf_req *req)
 {
 	struct zfcp_adapter *adapter = req->adapter;
-	struct fsf_status_read_buffer *buf =
-		(struct fsf_status_read_buffer *) req->data;
-	struct fsf_bit_error_payload *err =
-		(struct fsf_bit_error_payload *) buf->payload;
-	dev_warn(&adapter->ccw_device->dev,
-		 "Warning: bit error threshold data "
-		 "received for the adapter: "
-		 "link failures = %i, loss of sync errors = %i, "
-		 "loss of signal errors = %i, "
-		 "primitive sequence errors = %i, "
-		 "invalid transmission word errors = %i, "
-		 "CRC errors = %i).\n",
-		 err->link_failure_error_count,
-		 err->loss_of_sync_error_count,
-		 err->loss_of_signal_error_count,
-		 err->primitive_sequence_error_count,
-		 err->invalid_transmission_word_error_count,
-		 err->crc_error_count);
-	dev_warn(&adapter->ccw_device->dev,
-		 "Additional bit error threshold data of the adapter: "
-		 "primitive sequence event time-outs = %i, "
-		 "elastic buffer overrun errors = %i, "
-		 "advertised receive buffer-to-buffer credit = %i, "
-		 "current receice buffer-to-buffer credit = %i, "
-		 "advertised transmit buffer-to-buffer credit = %i, "
-		 "current transmit buffer-to-buffer credit = %i).\n",
-		 err->primitive_sequence_event_timeout_count,
-		 err->elastic_buffer_overrun_error_count,
-		 err->advertised_receive_b2b_credit,
-		 err->current_receive_b2b_credit,
-		 err->advertised_transmit_b2b_credit,
-		 err->current_transmit_b2b_credit);
-}
-
-/*
- * function:    zfcp_fsf_status_read_handler
- *
- * purpose:	is called for finished Open Port command
- *
- * returns:
- */
-static int
-zfcp_fsf_status_read_handler(struct zfcp_fsf_req *fsf_req)
-{
-	int retval = 0;
-	struct zfcp_adapter *adapter = fsf_req->adapter;
-	struct fsf_status_read_buffer *status_buffer =
-		(struct fsf_status_read_buffer *) fsf_req->data;
+	struct fsf_qtcb *qtcb = req->qtcb;
+	struct fsf_qtcb_bottom_config *bottom = &qtcb->bottom.config;
+	struct Scsi_Host *shost = adapter->scsi_host;
 
-	if (fsf_req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
-		zfcp_hba_dbf_event_fsf_unsol("dism", adapter, status_buffer);
-		mempool_free(status_buffer, adapter->pool.data_status_read);
-		zfcp_fsf_req_free(fsf_req);
-		goto out;
-	}
+	if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
+		return;
 
-	zfcp_hba_dbf_event_fsf_unsol("read", adapter, status_buffer);
+	adapter->fsf_lic_version = bottom->lic_version;
+	adapter->adapter_features = bottom->adapter_features;
+	adapter->connection_features = bottom->connection_features;
+	adapter->peer_wwpn = 0;
+	adapter->peer_wwnn = 0;
+	adapter->peer_d_id = 0;
 
-	switch (status_buffer->status_type) {
+	switch (qtcb->header.fsf_status) {
+	case FSF_GOOD:
+		if (zfcp_fsf_exchange_config_evaluate(req))
+			return;
 
-	case FSF_STATUS_READ_PORT_CLOSED:
-		zfcp_fsf_status_read_port_closed(fsf_req);
+		if (bottom->max_qtcb_size < sizeof(struct fsf_qtcb)) {
+			dev_err(&adapter->ccw_device->dev,
+				"Maximum QTCB size (%d bytes) allowed by "
+				"the adapter is lower than the minimum "
+				"required by the driver (%ld bytes).\n",
+				bottom->max_qtcb_size,
+				sizeof(struct fsf_qtcb));
+			zfcp_erp_adapter_shutdown(adapter, 0, 129, req);
+			return;
+		}
+		atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
+				&adapter->status);
 		break;
+	case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
+		fc_host_node_name(shost) = 0;
+		fc_host_port_name(shost) = 0;
+		fc_host_port_id(shost) = 0;
+		fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
+		fc_host_port_type(shost) = FC_PORTTYPE_UNKNOWN;
+		adapter->hydra_version = 0;
 
-	case FSF_STATUS_READ_INCOMING_ELS:
-		zfcp_fc_incoming_els(fsf_req);
-		break;
+		atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
+				&adapter->status);
 
-	case FSF_STATUS_READ_SENSE_DATA_AVAIL:
+		zfcp_fsf_link_down_info_eval(req, 42,
+			&qtcb->header.fsf_status_qual.link_down_info);
 		break;
+	default:
+		zfcp_erp_adapter_shutdown(adapter, 0, 130, req);
+		return;
+	}
 
-	case FSF_STATUS_READ_BIT_ERROR_THRESHOLD:
-		zfcp_fsf_bit_error_threshold(fsf_req);
-		break;
+	if (adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT) {
+		adapter->hardware_version = bottom->hardware_version;
+		memcpy(fc_host_serial_number(shost), bottom->serial_number,
+		       min(FC_SERIAL_NUMBER_SIZE, 17));
+		EBCASC(fc_host_serial_number(shost),
+		       min(FC_SERIAL_NUMBER_SIZE, 17));
+	}
 
-	case FSF_STATUS_READ_LINK_DOWN:
-		switch (status_buffer->status_subtype) {
-		case FSF_STATUS_READ_SUB_NO_PHYSICAL_LINK:
-			dev_warn(&adapter->ccw_device->dev,
-				 "Physical link is down.\n");
-			zfcp_fsf_link_down_info_eval(fsf_req, 38,
-				(struct fsf_link_down_info *)
-				&status_buffer->payload);
-			break;
-		case FSF_STATUS_READ_SUB_FDISC_FAILED:
-			dev_warn(&adapter->ccw_device->dev,
-				 "Local link is down "
-				 "due to failed FDISC login.\n");
-			zfcp_fsf_link_down_info_eval(fsf_req, 39,
-				(struct fsf_link_down_info *)
-				&status_buffer->payload);
-			break;
-		case FSF_STATUS_READ_SUB_FIRMWARE_UPDATE:
-			dev_warn(&adapter->ccw_device->dev,
-				 "Local link is down "
-				 "due to firmware update on adapter.\n");
-			zfcp_fsf_link_down_info_eval(fsf_req, 40, NULL);
-			break;
-		default:
-			dev_warn(&adapter->ccw_device->dev,
-				 "Local link is down.\n");
-			zfcp_fsf_link_down_info_eval(fsf_req, 41, NULL);
-		};
-		break;
+	if (FSF_QTCB_CURRENT_VERSION < bottom->low_qtcb_version) {
+		dev_err(&adapter->ccw_device->dev,
+			"The adapter only supports newer control block "
+			"versions, try updated device driver.\n");
+		zfcp_erp_adapter_shutdown(adapter, 0, 125, req);
+		return;
+	}
+	if (FSF_QTCB_CURRENT_VERSION > bottom->high_qtcb_version) {
+		dev_err(&adapter->ccw_device->dev,
+			"The adapter only supports older control block "
+			"versions, consider a microcode upgrade.\n");
+		zfcp_erp_adapter_shutdown(adapter, 0, 126, req);
+	}
+}
 
-	case FSF_STATUS_READ_LINK_UP:
-		dev_info(&adapter->ccw_device->dev,
-			 "Local link was replugged.\n");
-		/* All ports should be marked as ready to run again */
-		zfcp_erp_modify_adapter_status(adapter, 30, NULL,
-					       ZFCP_STATUS_COMMON_RUNNING,
-					       ZFCP_SET);
-		zfcp_erp_adapter_reopen(adapter,
-					ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED
-					| ZFCP_STATUS_COMMON_ERP_FAILED,
-					102, fsf_req);
-		break;
+static void zfcp_fsf_exchange_port_evaluate(struct zfcp_fsf_req *req)
+{
+	struct zfcp_adapter *adapter = req->adapter;
+	struct fsf_qtcb_bottom_port *bottom = &req->qtcb->bottom.port;
+	struct Scsi_Host *shost = adapter->scsi_host;
 
-	case FSF_STATUS_READ_NOTIFICATION_LOST:
-		if (status_buffer->status_subtype &
-		    FSF_STATUS_READ_SUB_ACT_UPDATED)
-			zfcp_erp_adapter_access_changed(adapter, 135, fsf_req);
-		if (status_buffer->status_subtype &
-		    FSF_STATUS_READ_SUB_INCOMING_ELS)
-			schedule_work(&adapter->scan_work);
-		break;
+	if (req->data)
+		memcpy(req->data, bottom, sizeof(*bottom));
 
-	case FSF_STATUS_READ_CFDC_UPDATED:
-		zfcp_erp_adapter_access_changed(adapter, 136, fsf_req);
-		break;
+	if (adapter->connection_features & FSF_FEATURE_NPIV_MODE)
+		fc_host_permanent_port_name(shost) = bottom->wwpn;
+	else
+		fc_host_permanent_port_name(shost) = fc_host_port_name(shost);
+	fc_host_maxframe_size(shost) = bottom->maximum_frame_size;
+	fc_host_supported_speeds(shost) = bottom->supported_speed;
+}
 
-	case FSF_STATUS_READ_FEATURE_UPDATE_ALERT:
-		adapter->adapter_features = *(u32*) status_buffer->payload;
+static void zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *req)
+{
+	struct zfcp_adapter *adapter = req->adapter;
+	struct fsf_qtcb *qtcb = req->qtcb;
+
+	if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
+		return;
+
+	switch (qtcb->header.fsf_status) {
+	case FSF_GOOD:
+		zfcp_fsf_exchange_port_evaluate(req);
+		atomic_set_mask(ZFCP_STATUS_ADAPTER_XPORT_OK, &adapter->status);
+		break;
+	case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
+		zfcp_fsf_exchange_port_evaluate(req);
+		atomic_set_mask(ZFCP_STATUS_ADAPTER_XPORT_OK, &adapter->status);
+		zfcp_fsf_link_down_info_eval(req, 43,
+			&qtcb->header.fsf_status_qual.link_down_info);
 		break;
 	}
-	mempool_free(status_buffer, adapter->pool.data_status_read);
-	zfcp_fsf_req_free(fsf_req);
-	/*
-	 * recycle buffer and start new request repeat until outbound
-	 * queue is empty or adapter shutdown is requested
-	 */
-	/*
-	 * FIXME(qdio):
-	 * we may wait in the req_create for 5s during shutdown, so
-	 * qdio_cleanup will have to wait at least that long before returning
-	 * with failure to allow us a proper cleanup under all circumstances
-	 */
-	/*
-	 * FIXME:
-	 * allocation failure possible? (Is this code needed?)
-	 */
+}
 
-	atomic_inc(&adapter->stat_miss);
-	schedule_work(&adapter->stat_work);
- out:
-	return retval;
+static int zfcp_fsf_sbal_check(struct zfcp_qdio_queue *queue)
+{
+	spin_lock(&queue->lock);
+	if (atomic_read(&queue->count))
+		return 1;
+	spin_unlock(&queue->lock);
+	return 0;
 }
 
-/*
- * function:    zfcp_fsf_abort_fcp_command
- *
- * purpose:	tells FSF to abort a running SCSI command
- *
- * returns:	address of initiated FSF request
- *		NULL - request could not be initiated
- *
- * FIXME(design): should be watched by a timeout !!!
- * FIXME(design) shouldn't this be modified to return an int
- *               also...don't know how though
- */
-struct zfcp_fsf_req *
-zfcp_fsf_abort_fcp_command(unsigned long old_req_id,
-			   struct zfcp_adapter *adapter,
-			   struct zfcp_unit *unit, int req_flags)
+static int zfcp_fsf_req_sbal_get(struct zfcp_adapter *adapter)
+{
+	long ret;
+	struct zfcp_qdio_queue *req_q = &adapter->req_q;
+
+	spin_unlock(&req_q->lock);
+	ret = wait_event_interruptible_timeout(adapter->request_wq,
+					zfcp_fsf_sbal_check(req_q), 5 * HZ);
+	if (ret > 0)
+		return 0;
+
+	spin_lock(&req_q->lock);
+	return -EIO;
+}
+
+static struct zfcp_fsf_req *zfcp_fsf_alloc_noqtcb(mempool_t *pool)
+{
+	struct zfcp_fsf_req *req;
+	req = mempool_alloc(pool, GFP_ATOMIC);
+	if (!req)
+		return NULL;
+	memset(req, 0, sizeof(*req));
+	return req;
+}
+
+static struct zfcp_fsf_req *zfcp_fsf_alloc_qtcb(mempool_t *pool)
+{
+	struct zfcp_fsf_req_qtcb *qtcb;
+
+	if (likely(pool))
+		qtcb = mempool_alloc(pool, GFP_ATOMIC);
+	else
+		qtcb = kmem_cache_alloc(zfcp_data.fsf_req_qtcb_cache,
+					GFP_ATOMIC);
+	if (unlikely(!qtcb))
+		return NULL;
+
+	memset(qtcb, 0, sizeof(*qtcb));
+	qtcb->fsf_req.qtcb = &qtcb->qtcb;
+	qtcb->fsf_req.pool = pool;
+
+	return &qtcb->fsf_req;
+}
+
+static struct zfcp_fsf_req *zfcp_fsf_req_create(struct zfcp_adapter *adapter,
+						u32 fsf_cmd, int req_flags,
+						mempool_t *pool)
 {
 	volatile struct qdio_buffer_element *sbale;
-	struct zfcp_fsf_req *fsf_req = NULL;
-	unsigned long lock_flags;
-	int retval = 0;
-
-	/* setup new FSF request */
-	retval = zfcp_fsf_req_create(adapter, FSF_QTCB_ABORT_FCP_CMND,
-				     req_flags, adapter->pool.fsf_req_abort,
-				     &lock_flags, &fsf_req);
-	if (retval < 0)
-		goto out;
-
-	if (unlikely(!atomic_test_mask(ZFCP_STATUS_COMMON_UNBLOCKED,
-			&unit->status)))
-		goto unit_blocked;
 
-	sbale = zfcp_qdio_sbale_req(fsf_req);
-        sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
-        sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
+	struct zfcp_fsf_req *req;
+	struct zfcp_qdio_queue *req_q = &adapter->req_q;
+
+	if (req_flags & ZFCP_REQ_NO_QTCB)
+		req = zfcp_fsf_alloc_noqtcb(pool);
+	else
+		req = zfcp_fsf_alloc_qtcb(pool);
 
-	fsf_req->data = (unsigned long) unit;
+	if (unlikely(!req))
+		return ERR_PTR(-EIO);
 
-	/* set handles of unit and its parent port in QTCB */
-	fsf_req->qtcb->header.lun_handle = unit->handle;
-	fsf_req->qtcb->header.port_handle = unit->port->handle;
+	if (adapter->req_no == 0)
+		adapter->req_no++;
 
-	/* set handle of request which should be aborted */
-	fsf_req->qtcb->bottom.support.req_handle = (u64) old_req_id;
+	INIT_LIST_HEAD(&req->list);
+	init_timer(&req->timer);
+	init_waitqueue_head(&req->completion_wq);
+
+	req->adapter = adapter;
+	req->fsf_command = fsf_cmd;
+	req->req_id = adapter->req_no++;
+	req->sbal_number = 1;
+	req->sbal_first = req_q->first;
+	req->sbal_last = req_q->first;
+	req->sbale_curr = 1;
 
-	zfcp_fsf_start_timer(fsf_req, ZFCP_SCSI_ER_TIMEOUT);
-	retval = zfcp_fsf_req_send(fsf_req);
-	if (!retval)
-		goto out;
+	sbale = zfcp_qdio_sbale_req(req);
+	sbale[0].addr = (void *) req->req_id;
+	sbale[0].flags |= SBAL_FLAGS0_COMMAND;
 
- unit_blocked:
-		zfcp_fsf_req_free(fsf_req);
-		fsf_req = NULL;
+	if (likely(req->qtcb)) {
+		req->qtcb->prefix.req_seq_no = req->adapter->fsf_req_seq_no;
+		req->qtcb->prefix.req_id = req->req_id;
+		req->qtcb->prefix.ulp_info = 26;
+		req->qtcb->prefix.qtcb_type = fsf_qtcb_type[req->fsf_command];
+		req->qtcb->prefix.qtcb_version = FSF_QTCB_CURRENT_VERSION;
+		req->qtcb->header.req_handle = req->req_id;
+		req->qtcb->header.fsf_command = req->fsf_command;
+		req->seq_no = adapter->fsf_req_seq_no;
+		req->qtcb->prefix.req_seq_no = adapter->fsf_req_seq_no;
+		sbale[1].addr = (void *) req->qtcb;
+		sbale[1].length = sizeof(struct fsf_qtcb);
+	}
+
+	if (!(atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_QDIOUP)) {
+		zfcp_fsf_req_free(req);
+		return ERR_PTR(-EIO);
+	}
+
+	if (likely(req_flags & ZFCP_REQ_AUTO_CLEANUP))
+		req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
 
- out:
-	write_unlock_irqrestore(&adapter->req_q.lock, lock_flags);
-	return fsf_req;
+	return req;
 }
 
-/*
- * function:    zfcp_fsf_abort_fcp_command_handler
- *
- * purpose:	is called for finished Abort FCP Command request
- *
- * returns:
+static int zfcp_fsf_req_send(struct zfcp_fsf_req *req)
+{
+	struct zfcp_adapter *adapter = req->adapter;
+	struct zfcp_qdio_queue *req_q = &adapter->req_q;
+	int idx;
+
+	/* put allocated FSF request into hash table */
+	spin_lock(&adapter->req_list_lock);
+	idx = zfcp_reqlist_hash(req->req_id);
+	list_add_tail(&req->list, &adapter->req_list[idx]);
+	spin_unlock(&adapter->req_list_lock);
+
+	req->issued = get_clock();
+	if (zfcp_qdio_send(req)) {
+		/* Queues are down..... */
+		del_timer(&req->timer);
+		spin_lock(&adapter->req_list_lock);
+		zfcp_reqlist_remove(adapter, req);
+		spin_unlock(&adapter->req_list_lock);
+		/* undo changes in request queue made for this request */
+		atomic_add(req->sbal_number, &req_q->count);
+		req_q->first -= req->sbal_number;
+		req_q->first += QDIO_MAX_BUFFERS_PER_Q;
+		req_q->first %= QDIO_MAX_BUFFERS_PER_Q; /* wrap */
+		zfcp_erp_adapter_reopen(adapter, 0, 116, req);
+		return -EIO;
+	}
+
+	/* Don't increase for unsolicited status */
+	if (req->qtcb)
+		adapter->fsf_req_seq_no++;
+
+	return 0;
+}
+
+/**
+ * zfcp_fsf_status_read - send status read request
+ * @adapter: pointer to struct zfcp_adapter
+ * @req_flags: request flags
+ * Returns: 0 on success, ERROR otherwise
  */
-static int
-zfcp_fsf_abort_fcp_command_handler(struct zfcp_fsf_req *new_fsf_req)
+int zfcp_fsf_status_read(struct zfcp_adapter *adapter)
 {
-	int retval = -EINVAL;
-	struct zfcp_unit *unit;
-	union fsf_status_qual *fsf_stat_qual =
-		&new_fsf_req->qtcb->header.fsf_status_qual;
+	struct zfcp_fsf_req *req;
+	struct fsf_status_read_buffer *sr_buf;
+	volatile struct qdio_buffer_element *sbale;
+	int retval = -EIO;
 
-	if (new_fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
-		/* do not set ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED */
-		goto skip_fsfstatus;
+	spin_lock(&adapter->req_q.lock);
+	if (zfcp_fsf_req_sbal_get(adapter))
+		goto out;
+
+	req = zfcp_fsf_req_create(adapter, FSF_QTCB_UNSOLICITED_STATUS,
+				  ZFCP_REQ_NO_QTCB,
+				  adapter->pool.fsf_req_status_read);
+	if (unlikely(IS_ERR(req))) {
+		retval = PTR_ERR(req);
+		goto out;
 	}
 
-	unit = (struct zfcp_unit *) new_fsf_req->data;
+	sbale = zfcp_qdio_sbale_req(req);
+	sbale[0].flags |= SBAL_FLAGS0_TYPE_STATUS;
+	sbale[2].flags |= SBAL_FLAGS_LAST_ENTRY;
+	req->sbale_curr = 2;
 
-	/* evaluate FSF status in QTCB */
-	switch (new_fsf_req->qtcb->header.fsf_status) {
+	sr_buf = mempool_alloc(adapter->pool.data_status_read, GFP_ATOMIC);
+	if (!sr_buf) {
+		retval = -ENOMEM;
+		goto failed_buf;
+	}
+	memset(sr_buf, 0, sizeof(*sr_buf));
+	req->data = sr_buf;
+	sbale = zfcp_qdio_sbale_curr(req);
+	sbale->addr = (void *) sr_buf;
+	sbale->length = sizeof(*sr_buf);
 
+	retval = zfcp_fsf_req_send(req);
+	if (retval)
+		goto failed_req_send;
+
+	goto out;
+
+failed_req_send:
+	mempool_free(sr_buf, adapter->pool.data_status_read);
+failed_buf:
+	zfcp_fsf_req_free(req);
+	zfcp_hba_dbf_event_fsf_unsol("fail", adapter, NULL);
+out:
+	spin_unlock(&adapter->req_q.lock);
+	return retval;
+}
+
+static void zfcp_fsf_abort_fcp_command_handler(struct zfcp_fsf_req *req)
+{
+	struct zfcp_unit *unit = req->data;
+	union fsf_status_qual *fsq = &req->qtcb->header.fsf_status_qual;
+
+	if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
+		return;
+
+	switch (req->qtcb->header.fsf_status) {
 	case FSF_PORT_HANDLE_NOT_VALID:
-		if (fsf_stat_qual->word[0] != fsf_stat_qual->word[1]) {
-			/*
-			 * In this case a command that was sent prior to a port
-			 * reopen was aborted (handles are different). This is
-			 * fine.
-			 */
-		} else {
-			/* Let's hope this sorts out the mess */
+		if (fsq->word[0] == fsq->word[1]) {
 			zfcp_erp_adapter_reopen(unit->port->adapter, 0, 104,
-						new_fsf_req);
-			new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
+						req);
+			req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 		}
 		break;
-
 	case FSF_LUN_HANDLE_NOT_VALID:
-		if (fsf_stat_qual->word[0] != fsf_stat_qual->word[1]) {
-			/*
-			 * In this case a command that was sent prior to a unit
-			 * reopen was aborted (handles are different).
-			 * This is fine.
-			 */
-		} else {
-			/* Let's hope this sorts out the mess */
-			zfcp_erp_port_reopen(unit->port, 0, 105, new_fsf_req);
-			new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
+		if (fsq->word[0] == fsq->word[1]) {
+			zfcp_erp_port_reopen(unit->port, 0, 105, req);
+			req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 		}
 		break;
-
 	case FSF_FCP_COMMAND_DOES_NOT_EXIST:
-		retval = 0;
-		new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED;
+		req->status |= ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED;
 		break;
-
 	case FSF_PORT_BOXED:
-		zfcp_erp_port_boxed(unit->port, 47, new_fsf_req);
-		new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR
-		    | ZFCP_STATUS_FSFREQ_RETRY;
+		zfcp_erp_port_boxed(unit->port, 47, req);
+		req->status |= ZFCP_STATUS_FSFREQ_ERROR |
+			       ZFCP_STATUS_FSFREQ_RETRY;
 		break;
-
 	case FSF_LUN_BOXED:
-		zfcp_erp_unit_boxed(unit, 48, new_fsf_req);
-                new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR
-                        | ZFCP_STATUS_FSFREQ_RETRY;
+		zfcp_erp_unit_boxed(unit, 48, req);
+		req->status |= ZFCP_STATUS_FSFREQ_ERROR |
+			       ZFCP_STATUS_FSFREQ_RETRY;
                 break;
-
 	case FSF_ADAPTER_STATUS_AVAILABLE:
-		switch (new_fsf_req->qtcb->header.fsf_status_qual.word[0]) {
+		switch (fsq->word[0]) {
 		case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
 			zfcp_test_link(unit->port);
-			new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
-			break;
 		case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
-			/* SCSI stack will escalate */
-			new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
+			req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 			break;
 		}
 		break;
-
 	case FSF_GOOD:
-		retval = 0;
-		new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED;
+		req->status |= ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED;
 		break;
 	}
- skip_fsfstatus:
-	return retval;
 }
 
 /**
- * zfcp_use_one_sbal - checks whether req buffer and resp bother each fit into
- *	one SBALE
- * Two scatter-gather lists are passed, one for the reqeust and one for the
- * response.
+ * zfcp_fsf_abort_fcp_command - abort running SCSI command
+ * @old_req_id: unsigned long
+ * @adapter: pointer to struct zfcp_adapter
+ * @unit: pointer to struct zfcp_unit
+ * @req_flags: integer specifying the request flags
+ * Returns: pointer to struct zfcp_fsf_req
+ *
+ * FIXME(design): should be watched by a timeout !!!
  */
-static inline int
-zfcp_use_one_sbal(struct scatterlist *req, int req_count,
-                  struct scatterlist *resp, int resp_count)
-{
-        return ((req_count == 1) &&
-		(resp_count == 1) &&
-                (((unsigned long) zfcp_sg_to_address(&req[0]) &
-		  PAGE_MASK) ==
-		 ((unsigned long) (zfcp_sg_to_address(&req[0]) +
-				   req[0].length - 1) & PAGE_MASK)) &&
-                (((unsigned long) zfcp_sg_to_address(&resp[0]) &
-		  PAGE_MASK) ==
-                 ((unsigned long) (zfcp_sg_to_address(&resp[0]) +
-				   resp[0].length - 1) & PAGE_MASK)));
-}
 
-/**
- * zfcp_fsf_send_ct - initiate a Generic Service request (FC-GS)
- * @ct: pointer to struct zfcp_send_ct which conatins all needed data for
- *	the request
- * @pool: pointer to memory pool, if non-null this pool is used to allocate
- *	a struct zfcp_fsf_req
- * @erp_action: pointer to erp_action, if non-null the Generic Service request
- *	is sent within error recovery
- */
-int
-zfcp_fsf_send_ct(struct zfcp_send_ct *ct, mempool_t *pool,
-		 struct zfcp_erp_action *erp_action)
+struct zfcp_fsf_req *zfcp_fsf_abort_fcp_command(unsigned long old_req_id,
+						struct zfcp_adapter *adapter,
+						struct zfcp_unit *unit,
+						int req_flags)
 {
 	volatile struct qdio_buffer_element *sbale;
-	struct zfcp_port *port;
-	struct zfcp_adapter *adapter;
-        struct zfcp_fsf_req *fsf_req;
-        unsigned long lock_flags;
-        int bytes;
-	int ret = 0;
-
-	port = ct->port;
-	adapter = port->adapter;
-
-	ret = zfcp_fsf_req_create(adapter, FSF_QTCB_SEND_GENERIC,
-				  ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP,
-				  pool, &lock_flags, &fsf_req);
-	if (ret < 0)
-		goto failed_req;
-
-	sbale = zfcp_qdio_sbale_req(fsf_req);
-        if (zfcp_use_one_sbal(ct->req, ct->req_count,
-                              ct->resp, ct->resp_count)){
-                /* both request buffer and response buffer
-                   fit into one sbale each */
-                sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE_READ;
-                sbale[2].addr = zfcp_sg_to_address(&ct->req[0]);
-                sbale[2].length = ct->req[0].length;
-                sbale[3].addr = zfcp_sg_to_address(&ct->resp[0]);
-                sbale[3].length = ct->resp[0].length;
-                sbale[3].flags |= SBAL_FLAGS_LAST_ENTRY;
-	} else if (adapter->adapter_features &
-                   FSF_FEATURE_ELS_CT_CHAINED_SBALS) {
-                /* try to use chained SBALs */
-                bytes = zfcp_qdio_sbals_from_sg(fsf_req,
-                                                SBAL_FLAGS0_TYPE_WRITE_READ,
-						ct->req,
-                                                ZFCP_MAX_SBALS_PER_CT_REQ);
-                if (bytes <= 0) {
-                        if (bytes == 0)
-                                ret = -ENOMEM;
-                        else
-                                ret = bytes;
-
-                        goto failed_send;
-                }
-                fsf_req->qtcb->bottom.support.req_buf_length = bytes;
-                fsf_req->sbale_curr = ZFCP_LAST_SBALE_PER_SBAL;
-                bytes = zfcp_qdio_sbals_from_sg(fsf_req,
-                                                SBAL_FLAGS0_TYPE_WRITE_READ,
-						ct->resp,
-                                                ZFCP_MAX_SBALS_PER_CT_REQ);
-                if (bytes <= 0) {
-                        if (bytes == 0)
-                                ret = -ENOMEM;
-                        else
-                                ret = bytes;
+	struct zfcp_fsf_req *req = NULL;
 
-                        goto failed_send;
-                }
-                fsf_req->qtcb->bottom.support.resp_buf_length = bytes;
-        } else {
-                /* reject send generic request */
-                ret = -EOPNOTSUPP;
-                goto failed_send;
-        }
-
-	/* settings in QTCB */
-	fsf_req->qtcb->header.port_handle = port->handle;
-	fsf_req->qtcb->bottom.support.service_class =
-		ZFCP_FC_SERVICE_CLASS_DEFAULT;
-	fsf_req->qtcb->bottom.support.timeout = ct->timeout;
-        fsf_req->data = (unsigned long) ct;
+	spin_lock(&adapter->req_q.lock);
+	if (!atomic_read(&adapter->req_q.count))
+		goto out;
+	req = zfcp_fsf_req_create(adapter, FSF_QTCB_ABORT_FCP_CMND,
+				  req_flags, adapter->pool.fsf_req_abort);
+	if (unlikely(IS_ERR(req)))
+		goto out;
 
-	zfcp_san_dbf_event_ct_request(fsf_req);
+	if (unlikely(!(atomic_read(&unit->status) &
+		       ZFCP_STATUS_COMMON_UNBLOCKED)))
+		goto out_error_free;
 
-	if (erp_action) {
-		erp_action->fsf_req = fsf_req;
-		fsf_req->erp_action = erp_action;
-		zfcp_erp_start_timer(fsf_req);
-	} else
-		zfcp_fsf_start_timer(fsf_req, ZFCP_FSF_REQUEST_TIMEOUT);
+	sbale = zfcp_qdio_sbale_req(req);
+	sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
+	sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
 
-	ret = zfcp_fsf_req_send(fsf_req);
-	if (ret)
-		goto failed_send;
+	req->data = unit;
+	req->handler = zfcp_fsf_abort_fcp_command_handler;
+	req->qtcb->header.lun_handle = unit->handle;
+	req->qtcb->header.port_handle = unit->port->handle;
+	req->qtcb->bottom.support.req_handle = (u64) old_req_id;
 
-	goto out;
+	zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
+	if (!zfcp_fsf_req_send(req))
+		goto out;
 
- failed_send:
-	zfcp_fsf_req_free(fsf_req);
-        if (erp_action != NULL) {
-                erp_action->fsf_req = NULL;
-        }
- failed_req:
- out:
-	write_unlock_irqrestore(&adapter->req_q.lock, lock_flags);
-	return ret;
+out_error_free:
+	zfcp_fsf_req_free(req);
+	req = NULL;
+out:
+	spin_unlock(&adapter->req_q.lock);
+	return req;
 }
 
-/**
- * zfcp_fsf_send_ct_handler - handler for Generic Service requests
- * @fsf_req: pointer to struct zfcp_fsf_req
- *
- * Data specific for the Generic Service request is passed using
- * fsf_req->data. There we find the pointer to struct zfcp_send_ct.
- * Usually a specific handler for the CT request is called which is
- * found in this structure.
- */
-static int
-zfcp_fsf_send_ct_handler(struct zfcp_fsf_req *fsf_req)
+static void zfcp_fsf_send_ct_handler(struct zfcp_fsf_req *req)
 {
-	struct zfcp_port *port;
-	struct zfcp_adapter *adapter;
-	struct zfcp_send_ct *send_ct;
-	struct fsf_qtcb_header *header;
-	struct fsf_qtcb_bottom_support *bottom;
-	int retval = -EINVAL;
+	struct zfcp_adapter *adapter = req->adapter;
+	struct zfcp_send_ct *send_ct = req->data;
+	struct zfcp_port *port = send_ct->port;
+	struct fsf_qtcb_header *header = &req->qtcb->header;
 
-	adapter = fsf_req->adapter;
-	send_ct = (struct zfcp_send_ct *) fsf_req->data;
-	port = send_ct->port;
-	header = &fsf_req->qtcb->header;
-	bottom = &fsf_req->qtcb->bottom.support;
+	send_ct->status = -EINVAL;
 
-	if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)
+	if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
 		goto skip_fsfstatus;
 
-	/* evaluate FSF status in QTCB */
 	switch (header->fsf_status) {
-
         case FSF_GOOD:
-		zfcp_san_dbf_event_ct_response(fsf_req);
-                retval = 0;
+		zfcp_san_dbf_event_ct_response(req);
+		send_ct->status = 0;
 		break;
-
         case FSF_SERVICE_CLASS_NOT_SUPPORTED:
-		zfcp_fsf_class_not_supp(fsf_req);
+		zfcp_fsf_class_not_supp(req);
 		break;
-
         case FSF_ADAPTER_STATUS_AVAILABLE:
                 switch (header->fsf_status_qual.word[0]){
                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
-			/* reopening link to port */
 			zfcp_test_link(port);
-			fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
-			break;
                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
-			/* ERP strategy will escalate */
-			fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
+			req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 			break;
                 }
                 break;
-
 	case FSF_ACCESS_DENIED:
-		zfcp_fsf_access_denied_port(fsf_req, port);
-		break;
-
-        case FSF_GENERIC_COMMAND_REJECTED:
-		fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
+		zfcp_fsf_access_denied_port(req, port);
 		break;
-
-        case FSF_PORT_HANDLE_NOT_VALID:
-		zfcp_erp_adapter_reopen(adapter, 0, 106, fsf_req);
-		fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
-		break;
-
         case FSF_PORT_BOXED:
-		zfcp_erp_port_boxed(port, 49, fsf_req);
-		fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR
-		    | ZFCP_STATUS_FSFREQ_RETRY;
+		zfcp_erp_port_boxed(port, 49, req);
+		req->status |= ZFCP_STATUS_FSFREQ_ERROR |
+			       ZFCP_STATUS_FSFREQ_RETRY;
 		break;
-
-	/* following states should never occure, all cases avoided
-	   in zfcp_fsf_send_ct - but who knows ... */
+	case FSF_PORT_HANDLE_NOT_VALID:
+		zfcp_erp_adapter_reopen(adapter, 0, 106, req);
+	case FSF_GENERIC_COMMAND_REJECTED:
 	case FSF_PAYLOAD_SIZE_MISMATCH:
 	case FSF_REQUEST_SIZE_TOO_LARGE:
 	case FSF_RESPONSE_SIZE_TOO_LARGE:
 	case FSF_SBAL_MISMATCH:
-		fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
-		break;
-
-       default:
+		req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 		break;
 	}
 
 skip_fsfstatus:
-	send_ct->status = retval;
-
-	if (send_ct->handler != NULL)
+	if (send_ct->handler)
 		send_ct->handler(send_ct->handler_data);
+}
 
-	return retval;
+static int zfcp_fsf_setup_sbals(struct zfcp_fsf_req *req,
+				struct scatterlist *sg_req,
+				struct scatterlist *sg_resp, int max_sbals)
+{
+	int bytes;
+
+	bytes = zfcp_qdio_sbals_from_sg(req, SBAL_FLAGS0_TYPE_WRITE_READ,
+					sg_req, max_sbals);
+	if (bytes <= 0)
+		return -ENOMEM;
+	req->qtcb->bottom.support.req_buf_length = bytes;
+	req->sbale_curr = ZFCP_LAST_SBALE_PER_SBAL;
+
+	bytes = zfcp_qdio_sbals_from_sg(req, SBAL_FLAGS0_TYPE_WRITE_READ,
+					sg_resp, max_sbals);
+	if (bytes <= 0)
+		return -ENOMEM;
+	req->qtcb->bottom.support.resp_buf_length = bytes;
+
+	return 0;
 }
 
 /**
- * zfcp_fsf_send_els - initiate an ELS command (FC-FS)
- * @els: pointer to struct zfcp_send_els which contains all needed data for
- *	the command.
- */
-int
-zfcp_fsf_send_els(struct zfcp_send_els *els)
-{
-	volatile struct qdio_buffer_element *sbale;
-	struct zfcp_fsf_req *fsf_req;
-	u32 d_id;
-	struct zfcp_adapter *adapter;
-	unsigned long lock_flags;
-        int bytes;
-	int ret = 0;
+ * zfcp_fsf_send_ct - initiate a Generic Service request (FC-GS)
+ * @ct: pointer to struct zfcp_send_ct with data for request
+ * @pool: if non-null this mempool is used to allocate struct zfcp_fsf_req
+ * @erp_action: if non-null the Generic Service request sent within ERP
+ */
+int zfcp_fsf_send_ct(struct zfcp_send_ct *ct, mempool_t *pool,
+		     struct zfcp_erp_action *erp_action)
+{
+	struct zfcp_port *port = ct->port;
+	struct zfcp_adapter *adapter = port->adapter;
+	struct zfcp_fsf_req *req;
+	int ret = -EIO;
 
-	d_id = els->d_id;
-	adapter = els->adapter;
+	spin_lock(&adapter->req_q.lock);
+	if (zfcp_fsf_req_sbal_get(adapter))
+		goto out;
 
-        ret = zfcp_fsf_req_create(adapter, FSF_QTCB_SEND_ELS,
-				  ZFCP_REQ_AUTO_CLEANUP,
-				  NULL, &lock_flags, &fsf_req);
-	if (ret < 0)
-                goto failed_req;
-
-	if (unlikely(!atomic_test_mask(ZFCP_STATUS_COMMON_UNBLOCKED,
-			&els->port->status))) {
-		ret = -EBUSY;
-		goto port_blocked;
-	}
-
-	sbale = zfcp_qdio_sbale_req(fsf_req);
-        if (zfcp_use_one_sbal(els->req, els->req_count,
-                              els->resp, els->resp_count)){
-                /* both request buffer and response buffer
-                   fit into one sbale each */
-                sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE_READ;
-                sbale[2].addr = zfcp_sg_to_address(&els->req[0]);
-                sbale[2].length = els->req[0].length;
-                sbale[3].addr = zfcp_sg_to_address(&els->resp[0]);
-                sbale[3].length = els->resp[0].length;
-                sbale[3].flags |= SBAL_FLAGS_LAST_ENTRY;
-	} else if (adapter->adapter_features &
-                   FSF_FEATURE_ELS_CT_CHAINED_SBALS) {
-                /* try to use chained SBALs */
-                bytes = zfcp_qdio_sbals_from_sg(fsf_req,
-                                                SBAL_FLAGS0_TYPE_WRITE_READ,
-						els->req,
-                                                ZFCP_MAX_SBALS_PER_ELS_REQ);
-                if (bytes <= 0) {
-                        if (bytes == 0) {
-                                ret = -ENOMEM;
-                        } else {
-                                ret = bytes;
-                        }
-                        goto failed_send;
-                }
-                fsf_req->qtcb->bottom.support.req_buf_length = bytes;
-                fsf_req->sbale_curr = ZFCP_LAST_SBALE_PER_SBAL;
-                bytes = zfcp_qdio_sbals_from_sg(fsf_req,
-                                                SBAL_FLAGS0_TYPE_WRITE_READ,
-						els->resp,
-                                                ZFCP_MAX_SBALS_PER_ELS_REQ);
-                if (bytes <= 0) {
-                        if (bytes == 0) {
-                                ret = -ENOMEM;
-                        } else {
-                                ret = bytes;
-                        }
-                        goto failed_send;
-                }
-                fsf_req->qtcb->bottom.support.resp_buf_length = bytes;
-        } else {
-                /* reject request */
-                ret = -EOPNOTSUPP;
-                goto failed_send;
-        }
-
-	/* settings in QTCB */
-	fsf_req->qtcb->bottom.support.d_id = d_id;
-	fsf_req->qtcb->bottom.support.service_class =
-		ZFCP_FC_SERVICE_CLASS_DEFAULT;
-	fsf_req->qtcb->bottom.support.timeout = ZFCP_ELS_TIMEOUT;
-	fsf_req->data = (unsigned long) els;
+	req = zfcp_fsf_req_create(adapter, FSF_QTCB_SEND_GENERIC,
+				  ZFCP_REQ_AUTO_CLEANUP, pool);
+	if (unlikely(IS_ERR(req))) {
+		ret = PTR_ERR(req);
+		goto out;
+	}
+
+	ret = zfcp_fsf_setup_sbals(req, ct->req, ct->resp,
+				   FSF_MAX_SBALS_PER_REQ);
+	if (ret)
+		goto failed_send;
 
-	sbale = zfcp_qdio_sbale_req(fsf_req);
+	req->handler = zfcp_fsf_send_ct_handler;
+	req->qtcb->header.port_handle = port->handle;
+	req->qtcb->bottom.support.service_class = FSF_CLASS_3;
+	req->qtcb->bottom.support.timeout = ct->timeout;
+	req->data = ct;
 
-	zfcp_san_dbf_event_els_request(fsf_req);
+	zfcp_san_dbf_event_ct_request(req);
+
+	if (erp_action) {
+		erp_action->fsf_req = req;
+		req->erp_action = erp_action;
+		zfcp_erp_start_timer(req);
+	} else
+		zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
 
-	zfcp_fsf_start_timer(fsf_req, ZFCP_FSF_REQUEST_TIMEOUT);
-	ret = zfcp_fsf_req_send(fsf_req);
+	ret = zfcp_fsf_req_send(req);
 	if (ret)
 		goto failed_send;
 
 	goto out;
 
- port_blocked:
- failed_send:
-	zfcp_fsf_req_free(fsf_req);
-
- failed_req:
- out:
-	write_unlock_irqrestore(&adapter->req_q.lock, lock_flags);
-
-        return ret;
+failed_send:
+	zfcp_fsf_req_free(req);
+	if (erp_action)
+		erp_action->fsf_req = NULL;
+out:
+	spin_unlock(&adapter->req_q.lock);
+	return ret;
 }
 
-/**
- * zfcp_fsf_send_els_handler - handler for ELS commands
- * @fsf_req: pointer to struct zfcp_fsf_req
- *
- * Data specific for the ELS command is passed using
- * fsf_req->data. There we find the pointer to struct zfcp_send_els.
- * Usually a specific handler for the ELS command is called which is
- * found in this structure.
- */
-static int zfcp_fsf_send_els_handler(struct zfcp_fsf_req *fsf_req)
+static void zfcp_fsf_send_els_handler(struct zfcp_fsf_req *req)
 {
-	struct zfcp_adapter *adapter;
-	struct zfcp_port *port;
-	u32 d_id;
-	struct fsf_qtcb_header *header;
-	struct fsf_qtcb_bottom_support *bottom;
-	struct zfcp_send_els *send_els;
-	int retval = -EINVAL;
+	struct zfcp_send_els *send_els = req->data;
+	struct zfcp_port *port = send_els->port;
+	struct fsf_qtcb_header *header = &req->qtcb->header;
 
-	send_els = (struct zfcp_send_els *) fsf_req->data;
-	adapter = send_els->adapter;
-	port = send_els->port;
-	d_id = send_els->d_id;
-	header = &fsf_req->qtcb->header;
-	bottom = &fsf_req->qtcb->bottom.support;
+	send_els->status = -EINVAL;
 
-	if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)
+	if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
 		goto skip_fsfstatus;
 
 	switch (header->fsf_status) {
-
 	case FSF_GOOD:
-		zfcp_san_dbf_event_els_response(fsf_req);
-		retval = 0;
+		zfcp_san_dbf_event_els_response(req);
+		send_els->status = 0;
 		break;
-
 	case FSF_SERVICE_CLASS_NOT_SUPPORTED:
-		zfcp_fsf_class_not_supp(fsf_req);
+		zfcp_fsf_class_not_supp(req);
 		break;
-
 	case FSF_ADAPTER_STATUS_AVAILABLE:
 		switch (header->fsf_status_qual.word[0]){
 		case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
 			if (port && (send_els->ls_code != ZFCP_LS_ADISC))
 				zfcp_test_link(port);
-			fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
-			break;
+			/*fall through */
 		case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
-			fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
-			break;
 		case FSF_SQ_RETRY_IF_POSSIBLE:
-			fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
+			req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 			break;
 		}
 		break;
-
 	case FSF_ELS_COMMAND_REJECTED:
 	case FSF_PAYLOAD_SIZE_MISMATCH:
 	case FSF_REQUEST_SIZE_TOO_LARGE:
 	case FSF_RESPONSE_SIZE_TOO_LARGE:
 		break;
-
+	case FSF_ACCESS_DENIED:
+		zfcp_fsf_access_denied_port(req, port);
+		break;
 	case FSF_SBAL_MISMATCH:
 		/* should never occure, avoided in zfcp_fsf_send_els */
-		fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
+		/* fall through */
+	default:
+		req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 		break;
+	}
+skip_fsfstatus:
+	if (send_els->handler)
+		send_els->handler(send_els->handler_data);
+}
 
-	case FSF_ACCESS_DENIED:
-		zfcp_fsf_access_denied_port(fsf_req, port);
-		break;
+/**
+ * zfcp_fsf_send_els - initiate an ELS command (FC-FS)
+ * @els: pointer to struct zfcp_send_els with data for the command
+ */
+int zfcp_fsf_send_els(struct zfcp_send_els *els)
+{
+	struct zfcp_fsf_req *req;
+	struct zfcp_adapter *adapter = els->adapter;
+	struct fsf_qtcb_bottom_support *bottom;
+	int ret = -EIO;
 
-	default:
-		fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
-		break;
+	if (unlikely(!(atomic_read(&els->port->status) &
+		       ZFCP_STATUS_COMMON_UNBLOCKED)))
+		return -EBUSY;
+
+	spin_lock(&adapter->req_q.lock);
+	if (!atomic_read(&adapter->req_q.count))
+		goto out;
+	req = zfcp_fsf_req_create(adapter, FSF_QTCB_SEND_ELS,
+				  ZFCP_REQ_AUTO_CLEANUP, NULL);
+	if (unlikely(IS_ERR(req))) {
+		ret = PTR_ERR(req);
+		goto out;
 	}
 
-skip_fsfstatus:
-	send_els->status = retval;
+	ret = zfcp_fsf_setup_sbals(req, els->req, els->resp,
+				   FSF_MAX_SBALS_PER_ELS_REQ);
+	if (ret)
+		goto failed_send;
+
+	bottom = &req->qtcb->bottom.support;
+	req->handler = zfcp_fsf_send_els_handler;
+	bottom->d_id = els->d_id;
+	bottom->service_class = FSF_CLASS_3;
+	bottom->timeout = 2 * R_A_TOV;
+	req->data = els;
+
+	zfcp_san_dbf_event_els_request(req);
+
+	zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
+	ret = zfcp_fsf_req_send(req);
+	if (ret)
+		goto failed_send;
 
-	if (send_els->handler)
-		send_els->handler(send_els->handler_data);
+	goto out;
 
-	return retval;
+failed_send:
+	zfcp_fsf_req_free(req);
+out:
+	spin_unlock(&adapter->req_q.lock);
+	return ret;
 }
 
-int
-zfcp_fsf_exchange_config_data(struct zfcp_erp_action *erp_action)
+int zfcp_fsf_exchange_config_data(struct zfcp_erp_action *erp_action)
 {
 	volatile struct qdio_buffer_element *sbale;
-	struct zfcp_fsf_req *fsf_req;
+	struct zfcp_fsf_req *req;
 	struct zfcp_adapter *adapter = erp_action->adapter;
-	unsigned long lock_flags;
-	int retval;
+	int retval = -EIO;
 
-	/* setup new FSF request */
-	retval = zfcp_fsf_req_create(adapter,
-				     FSF_QTCB_EXCHANGE_CONFIG_DATA,
-				     ZFCP_REQ_AUTO_CLEANUP,
-				     adapter->pool.fsf_req_erp,
-				     &lock_flags, &fsf_req);
-	if (retval) {
-		write_unlock_irqrestore(&adapter->req_q.lock, lock_flags);
-		return retval;
+	spin_lock(&adapter->req_q.lock);
+	if (!atomic_read(&adapter->req_q.count))
+		goto out;
+	req = zfcp_fsf_req_create(adapter,
+				  FSF_QTCB_EXCHANGE_CONFIG_DATA,
+				  ZFCP_REQ_AUTO_CLEANUP,
+				  adapter->pool.fsf_req_erp);
+	if (unlikely(IS_ERR(req))) {
+		retval = PTR_ERR(req);
+		goto out;
 	}
 
-	sbale = zfcp_qdio_sbale_req(fsf_req);
+	sbale = zfcp_qdio_sbale_req(req);
 	sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
 	sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
 
-	fsf_req->qtcb->bottom.config.feature_selection =
+	req->qtcb->bottom.config.feature_selection =
 			FSF_FEATURE_CFDC |
 			FSF_FEATURE_LUN_SHARING |
 			FSF_FEATURE_NOTIFICATION_LOST |
 			FSF_FEATURE_UPDATE_ALERT;
-	fsf_req->erp_action = erp_action;
-	erp_action->fsf_req = fsf_req;
+	req->erp_action = erp_action;
+	req->handler = zfcp_fsf_exchange_config_data_handler;
+	erp_action->fsf_req = req;
 
-	zfcp_erp_start_timer(fsf_req);
-	retval = zfcp_fsf_req_send(fsf_req);
-	write_unlock_irqrestore(&adapter->req_q.lock, lock_flags);
+	zfcp_erp_start_timer(req);
+	retval = zfcp_fsf_req_send(req);
 	if (retval) {
-		zfcp_fsf_req_free(fsf_req);
+		zfcp_fsf_req_free(req);
 		erp_action->fsf_req = NULL;
 	}
-
+out:
+	spin_unlock(&adapter->req_q.lock);
 	return retval;
 }
 
-int
-zfcp_fsf_exchange_config_data_sync(struct zfcp_adapter *adapter,
-				struct fsf_qtcb_bottom_config *data)
+int zfcp_fsf_exchange_config_data_sync(struct zfcp_adapter *adapter,
+				       struct fsf_qtcb_bottom_config *data)
 {
 	volatile struct qdio_buffer_element *sbale;
-	struct zfcp_fsf_req *fsf_req;
-	unsigned long lock_flags;
-	int retval;
-
-	/* setup new FSF request */
-	retval = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_CONFIG_DATA,
-				     ZFCP_WAIT_FOR_SBAL, NULL, &lock_flags,
-				     &fsf_req);
-	if (retval) {
-		write_unlock_irqrestore(&adapter->req_q.lock, lock_flags);
-		return retval;
+	struct zfcp_fsf_req *req = NULL;
+	int retval = -EIO;
+
+	spin_lock(&adapter->req_q.lock);
+	if (zfcp_fsf_req_sbal_get(adapter))
+		goto out;
+
+	req = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_CONFIG_DATA,
+				  0, NULL);
+	if (unlikely(IS_ERR(req))) {
+		retval = PTR_ERR(req);
+		goto out;
 	}
 
-	sbale = zfcp_qdio_sbale_req(fsf_req);
+	sbale = zfcp_qdio_sbale_req(req);
 	sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
 	sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
+	req->handler = zfcp_fsf_exchange_config_data_handler;
 
-	fsf_req->qtcb->bottom.config.feature_selection =
+	req->qtcb->bottom.config.feature_selection =
 			FSF_FEATURE_CFDC |
 			FSF_FEATURE_LUN_SHARING |
 			FSF_FEATURE_NOTIFICATION_LOST |
 			FSF_FEATURE_UPDATE_ALERT;
 
 	if (data)
-		fsf_req->data = (unsigned long) data;
+		req->data = data;
 
-	zfcp_fsf_start_timer(fsf_req, ZFCP_FSF_REQUEST_TIMEOUT);
-	retval = zfcp_fsf_req_send(fsf_req);
-	write_unlock_irqrestore(&adapter->req_q.lock, lock_flags);
+	zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
+	retval = zfcp_fsf_req_send(req);
+out:
+	spin_unlock(&adapter->req_q.lock);
 	if (!retval)
-		wait_event(fsf_req->completion_wq,
-			   fsf_req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
+		wait_event(req->completion_wq,
+			   req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
 
-	zfcp_fsf_req_free(fsf_req);
+	zfcp_fsf_req_free(req);
 
 	return retval;
 }
 
 /**
- * zfcp_fsf_exchange_config_evaluate
- * @fsf_req: fsf_req which belongs to xchg config data request
- * @xchg_ok: specifies if xchg config data was incomplete or complete (0/1)
- *
- * returns: -EIO on error, 0 otherwise
- */
-static int
-zfcp_fsf_exchange_config_evaluate(struct zfcp_fsf_req *fsf_req, int xchg_ok)
-{
-	struct fsf_qtcb_bottom_config *bottom;
-	struct zfcp_adapter *adapter = fsf_req->adapter;
-	struct Scsi_Host *shost = adapter->scsi_host;
-
-	bottom = &fsf_req->qtcb->bottom.config;
-	adapter->fsf_lic_version = bottom->lic_version;
-	adapter->adapter_features = bottom->adapter_features;
-	adapter->connection_features = bottom->connection_features;
-	adapter->peer_wwpn = 0;
-	adapter->peer_wwnn = 0;
-	adapter->peer_d_id = 0;
-
-	if (xchg_ok) {
-
-		if (fsf_req->data)
-			memcpy((struct fsf_qtcb_bottom_config *) fsf_req->data,
-				bottom, sizeof (struct fsf_qtcb_bottom_config));
-
-		fc_host_node_name(shost) = bottom->nport_serv_param.wwnn;
-		fc_host_port_name(shost) = bottom->nport_serv_param.wwpn;
-		fc_host_port_id(shost) = bottom->s_id & ZFCP_DID_MASK;
-		fc_host_speed(shost) = bottom->fc_link_speed;
-		fc_host_supported_classes(shost) =
-				FC_COS_CLASS2 | FC_COS_CLASS3;
-		adapter->hydra_version = bottom->adapter_type;
-		adapter->timer_ticks = bottom->timer_interval;
-		if (fc_host_permanent_port_name(shost) == -1)
-			fc_host_permanent_port_name(shost) =
-				fc_host_port_name(shost);
-		if (bottom->fc_topology == FSF_TOPO_P2P) {
-			adapter->peer_d_id = bottom->peer_d_id & ZFCP_DID_MASK;
-			adapter->peer_wwpn = bottom->plogi_payload.wwpn;
-			adapter->peer_wwnn = bottom->plogi_payload.wwnn;
-			fc_host_port_type(shost) = FC_PORTTYPE_PTP;
-		} else if (bottom->fc_topology == FSF_TOPO_FABRIC)
-			fc_host_port_type(shost) = FC_PORTTYPE_NPORT;
-		else if (bottom->fc_topology == FSF_TOPO_AL)
-			fc_host_port_type(shost) = FC_PORTTYPE_NLPORT;
-		else
-			fc_host_port_type(shost) = FC_PORTTYPE_UNKNOWN;
-	} else {
-		fc_host_node_name(shost) = 0;
-		fc_host_port_name(shost) = 0;
-		fc_host_port_id(shost) = 0;
-		fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
-		fc_host_port_type(shost) = FC_PORTTYPE_UNKNOWN;
-		adapter->hydra_version = 0;
-	}
-
-	if (adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT) {
-		adapter->hardware_version = bottom->hardware_version;
-		memcpy(fc_host_serial_number(shost), bottom->serial_number,
-		       min(FC_SERIAL_NUMBER_SIZE, 17));
-		EBCASC(fc_host_serial_number(shost),
-		       min(FC_SERIAL_NUMBER_SIZE, 17));
-	}
-
-	if (ZFCP_QTCB_VERSION < bottom->low_qtcb_version) {
-		dev_err(&adapter->ccw_device->dev,
-			"The adapter only supports newer control block "
-			"versions, try updated device driver.\n");
-		zfcp_erp_adapter_shutdown(adapter, 0, 125, fsf_req);
-		return -EIO;
-	}
-	if (ZFCP_QTCB_VERSION > bottom->high_qtcb_version) {
-		dev_err(&adapter->ccw_device->dev,
-			"The adapter only supports older control block "
-			"versions, consider a microcode upgrade.\n");
-		zfcp_erp_adapter_shutdown(adapter, 0, 126, fsf_req);
-		return -EIO;
-	}
-	return 0;
-}
-
-/**
- * function:    zfcp_fsf_exchange_config_data_handler
- *
- * purpose:     is called for finished Exchange Configuration Data command
- *
- * returns:
- */
-static int
-zfcp_fsf_exchange_config_data_handler(struct zfcp_fsf_req *fsf_req)
-{
-	struct fsf_qtcb_bottom_config *bottom;
-	struct zfcp_adapter *adapter = fsf_req->adapter;
-	struct fsf_qtcb *qtcb = fsf_req->qtcb;
-
-	if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)
-		return -EIO;
-
-	switch (qtcb->header.fsf_status) {
-
-	case FSF_GOOD:
-		if (zfcp_fsf_exchange_config_evaluate(fsf_req, 1))
-			return -EIO;
-
-		switch (fc_host_port_type(adapter->scsi_host)) {
-		case FC_PORTTYPE_PTP:
-			if (fsf_req->erp_action)
-				dev_info(&adapter->ccw_device->dev,
-					 "Point-to-Point fibrechannel "
-					 "configuration detected.\n");
-			break;
-		case FC_PORTTYPE_NLPORT:
-			dev_err(&adapter->ccw_device->dev,
-				"Unsupported arbitrated loop fibrechannel "
-				"topology detected, shutting down adapter\n");
-			zfcp_erp_adapter_shutdown(adapter, 0, 127, fsf_req);
-			return -EIO;
-		case FC_PORTTYPE_NPORT:
-			if (fsf_req->erp_action)
-				dev_info(&adapter->ccw_device->dev,
-					 "Switched fabric fibrechannel "
-					 "network detected.\n");
-			break;
-		default:
-			dev_err(&adapter->ccw_device->dev,
-				"The fibrechannel topology reported by the "
-				"adapter is not known by the zfcp driver, "
-				"shutting down adapter.\n");
-			zfcp_erp_adapter_shutdown(adapter, 0, 128, fsf_req);
-			return -EIO;
-		}
-		bottom = &qtcb->bottom.config;
-		if (bottom->max_qtcb_size < sizeof(struct fsf_qtcb)) {
-			dev_err(&adapter->ccw_device->dev,
-				"Maximum QTCB size (%d bytes) allowed by "
-				"the adapter is lower than the minimum "
-				"required by the driver (%ld bytes).\n",
-				bottom->max_qtcb_size, sizeof(struct fsf_qtcb));
-			zfcp_erp_adapter_shutdown(adapter, 0, 129, fsf_req);
-			return -EIO;
-		}
-		atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
-				&adapter->status);
-		break;
-	case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
-		if (zfcp_fsf_exchange_config_evaluate(fsf_req, 0))
-			return -EIO;
-
-		atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
-				&adapter->status);
-
-		zfcp_fsf_link_down_info_eval(fsf_req, 42,
-			&qtcb->header.fsf_status_qual.link_down_info);
-		break;
-	default:
-		zfcp_erp_adapter_shutdown(adapter, 0, 130, fsf_req);
-		return -EIO;
-	}
-	return 0;
-}
-
-/**
  * zfcp_fsf_exchange_port_data - request information about local port
  * @erp_action: ERP action for the adapter for which port data is requested
+ * Returns: 0 on success, error otherwise
  */
-int
-zfcp_fsf_exchange_port_data(struct zfcp_erp_action *erp_action)
+int zfcp_fsf_exchange_port_data(struct zfcp_erp_action *erp_action)
 {
 	volatile struct qdio_buffer_element *sbale;
-	struct zfcp_fsf_req *fsf_req;
+	struct zfcp_fsf_req *req;
 	struct zfcp_adapter *adapter = erp_action->adapter;
-	unsigned long lock_flags;
-	int retval;
+	int retval = -EIO;
 
 	if (!(adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
 		return -EOPNOTSUPP;
 
-	/* setup new FSF request */
-	retval = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_PORT_DATA,
-				     ZFCP_REQ_AUTO_CLEANUP,
-				     adapter->pool.fsf_req_erp,
-				     &lock_flags, &fsf_req);
-	if (retval) {
-		write_unlock_irqrestore(&adapter->req_q.lock, lock_flags);
-		return retval;
+	spin_lock(&adapter->req_q.lock);
+	if (!atomic_read(&adapter->req_q.count))
+		goto out;
+	req = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_PORT_DATA,
+				  ZFCP_REQ_AUTO_CLEANUP,
+				  adapter->pool.fsf_req_erp);
+	if (unlikely(IS_ERR(req))) {
+		retval = PTR_ERR(req);
+		goto out;
 	}
 
-	sbale = zfcp_qdio_sbale_req(fsf_req);
+	sbale = zfcp_qdio_sbale_req(req);
 	sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
 	sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
 
-	erp_action->fsf_req = fsf_req;
-	fsf_req->erp_action = erp_action;
-	zfcp_erp_start_timer(fsf_req);
-
-	retval = zfcp_fsf_req_send(fsf_req);
-	write_unlock_irqrestore(&adapter->req_q.lock, lock_flags);
+	req->handler = zfcp_fsf_exchange_port_data_handler;
+	req->erp_action = erp_action;
+	erp_action->fsf_req = req;
 
+	zfcp_erp_start_timer(req);
+	retval = zfcp_fsf_req_send(req);
 	if (retval) {
-		zfcp_fsf_req_free(fsf_req);
+		zfcp_fsf_req_free(req);
 		erp_action->fsf_req = NULL;
 	}
+out:
+	spin_unlock(&adapter->req_q.lock);
 	return retval;
 }
 
-
 /**
  * zfcp_fsf_exchange_port_data_sync - request information about local port
- * and wait until information is ready
+ * @adapter: pointer to struct zfcp_adapter
+ * @data: pointer to struct fsf_qtcb_bottom_port
+ * Returns: 0 on success, error otherwise
  */
-int
-zfcp_fsf_exchange_port_data_sync(struct zfcp_adapter *adapter,
-				struct fsf_qtcb_bottom_port *data)
+int zfcp_fsf_exchange_port_data_sync(struct zfcp_adapter *adapter,
+				     struct fsf_qtcb_bottom_port *data)
 {
 	volatile struct qdio_buffer_element *sbale;
-	struct zfcp_fsf_req *fsf_req;
-	unsigned long lock_flags;
-	int retval;
+	struct zfcp_fsf_req *req = NULL;
+	int retval = -EIO;
 
 	if (!(adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT))
 		return -EOPNOTSUPP;
 
-	/* setup new FSF request */
-	retval = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_PORT_DATA,
-				0, NULL, &lock_flags, &fsf_req);
-	if (retval) {
-		write_unlock_irqrestore(&adapter->req_q.lock, lock_flags);
-		return retval;
+	spin_lock(&adapter->req_q.lock);
+	if (!atomic_read(&adapter->req_q.count))
+		goto out;
+
+	req = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_PORT_DATA, 0,
+				  NULL);
+	if (unlikely(IS_ERR(req))) {
+		retval = PTR_ERR(req);
+		goto out;
 	}
 
 	if (data)
-		fsf_req->data = (unsigned long) data;
+		req->data = data;
 
-	sbale = zfcp_qdio_sbale_req(fsf_req);
+	sbale = zfcp_qdio_sbale_req(req);
 	sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
 	sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
 
-	zfcp_fsf_start_timer(fsf_req, ZFCP_FSF_REQUEST_TIMEOUT);
-	retval = zfcp_fsf_req_send(fsf_req);
-	write_unlock_irqrestore(&adapter->req_q.lock, lock_flags);
-
+	req->handler = zfcp_fsf_exchange_port_data_handler;
+	zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
+	retval = zfcp_fsf_req_send(req);
+out:
+	spin_unlock(&adapter->req_q.lock);
 	if (!retval)
-		wait_event(fsf_req->completion_wq,
-			   fsf_req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
-
-	zfcp_fsf_req_free(fsf_req);
-
-	return retval;
-}
-
-/**
- * zfcp_fsf_exchange_port_evaluate
- * @fsf_req: fsf_req which belongs to xchg port data request
- * @xchg_ok: specifies if xchg port data was incomplete or complete (0/1)
- */
-static void
-zfcp_fsf_exchange_port_evaluate(struct zfcp_fsf_req *fsf_req, int xchg_ok)
-{
-	struct zfcp_adapter *adapter;
-	struct fsf_qtcb_bottom_port *bottom;
-	struct Scsi_Host *shost;
-
-	adapter = fsf_req->adapter;
-	bottom = &fsf_req->qtcb->bottom.port;
-	shost = adapter->scsi_host;
-
-	if (fsf_req->data)
-		memcpy((struct fsf_qtcb_bottom_port*) fsf_req->data, bottom,
-			sizeof(struct fsf_qtcb_bottom_port));
-
-	if (adapter->connection_features & FSF_FEATURE_NPIV_MODE)
-		fc_host_permanent_port_name(shost) = bottom->wwpn;
-	else
-		fc_host_permanent_port_name(shost) = fc_host_port_name(shost);
-	fc_host_maxframe_size(shost) = bottom->maximum_frame_size;
-	fc_host_supported_speeds(shost) = bottom->supported_speed;
-}
-
-/**
- * zfcp_fsf_exchange_port_data_handler - handler for exchange_port_data request
- * @fsf_req: pointer to struct zfcp_fsf_req
- */
-static void
-zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *fsf_req)
-{
-	struct zfcp_adapter *adapter;
-	struct fsf_qtcb *qtcb;
-
-	adapter = fsf_req->adapter;
-	qtcb = fsf_req->qtcb;
-
-	if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)
-		return;
-
-	switch (qtcb->header.fsf_status) {
-        case FSF_GOOD:
-		zfcp_fsf_exchange_port_evaluate(fsf_req, 1);
-		atomic_set_mask(ZFCP_STATUS_ADAPTER_XPORT_OK, &adapter->status);
-		break;
-	case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
-		zfcp_fsf_exchange_port_evaluate(fsf_req, 0);
-		atomic_set_mask(ZFCP_STATUS_ADAPTER_XPORT_OK, &adapter->status);
-		zfcp_fsf_link_down_info_eval(fsf_req, 43,
-			&qtcb->header.fsf_status_qual.link_down_info);
-                break;
-	}
-}
-
-
-/*
- * function:    zfcp_fsf_open_port
- *
- * purpose:
- *
- * returns:	address of initiated FSF request
- *		NULL - request could not be initiated
- */
-int
-zfcp_fsf_open_port(struct zfcp_erp_action *erp_action)
-{
-	volatile struct qdio_buffer_element *sbale;
-	struct zfcp_fsf_req *fsf_req;
-	unsigned long lock_flags;
-	int retval = 0;
-
-	/* setup new FSF request */
-	retval = zfcp_fsf_req_create(erp_action->adapter,
-				     FSF_QTCB_OPEN_PORT_WITH_DID,
-				     ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP,
-				     erp_action->adapter->pool.fsf_req_erp,
-				     &lock_flags, &fsf_req);
-	if (retval < 0)
-		goto out;
-
-	sbale = zfcp_qdio_sbale_req(fsf_req);
-        sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
-        sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
-
-	fsf_req->qtcb->bottom.support.d_id = erp_action->port->d_id;
-	atomic_set_mask(ZFCP_STATUS_COMMON_OPENING, &erp_action->port->status);
-	fsf_req->data = (unsigned long) erp_action->port;
-	fsf_req->erp_action = erp_action;
-	erp_action->fsf_req = fsf_req;
-
-	zfcp_erp_start_timer(fsf_req);
-	retval = zfcp_fsf_req_send(fsf_req);
-	if (retval) {
-		zfcp_fsf_req_free(fsf_req);
-		erp_action->fsf_req = NULL;
-		goto out;
-	}
+		wait_event(req->completion_wq,
+			   req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
+	zfcp_fsf_req_free(req);
 
- out:
-	write_unlock_irqrestore(&erp_action->adapter->req_q.lock, lock_flags);
 	return retval;
 }
 
-/*
- * function:    zfcp_fsf_open_port_handler
- *
- * purpose:	is called for finished Open Port command
- *
- * returns:
- */
-static int
-zfcp_fsf_open_port_handler(struct zfcp_fsf_req *fsf_req)
+static void zfcp_fsf_open_port_handler(struct zfcp_fsf_req *req)
 {
-	int retval = -EINVAL;
-	struct zfcp_port *port;
+	struct zfcp_port *port = req->data;
+	struct fsf_qtcb_header *header = &req->qtcb->header;
 	struct fsf_plogi *plogi;
-	struct fsf_qtcb_header *header;
-
-	port = (struct zfcp_port *) fsf_req->data;
-	header = &fsf_req->qtcb->header;
 
-	if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
-		/* don't change port status in our bookkeeping */
+	if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
 		goto skip_fsfstatus;
-	}
 
-	/* evaluate FSF status in QTCB */
 	switch (header->fsf_status) {
-
 	case FSF_PORT_ALREADY_OPEN:
-		/*
-		 * This is a bug, however operation should continue normally
-		 * if it is simply ignored
-		 */
 		break;
-
 	case FSF_ACCESS_DENIED:
-		zfcp_fsf_access_denied_port(fsf_req, port);
+		zfcp_fsf_access_denied_port(req, port);
 		break;
-
 	case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
-		dev_warn(&fsf_req->adapter->ccw_device->dev,
+		dev_warn(&req->adapter->ccw_device->dev,
 			 "The adapter is out of resources. The remote port "
 			 "0x%016Lx could not be opened, disabling it.\n",
 			 port->wwpn);
-		zfcp_erp_port_failed(port, 31, fsf_req);
-		fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
+		zfcp_erp_port_failed(port, 31, req);
+		req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 		break;
-
 	case FSF_ADAPTER_STATUS_AVAILABLE:
 		switch (header->fsf_status_qual.word[0]) {
 		case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
-			/* ERP strategy will escalate */
-			fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
-			break;
 		case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
-			/* ERP strategy will escalate */
-			fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
+			req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 			break;
 		case FSF_SQ_NO_RETRY_POSSIBLE:
-			dev_warn(&fsf_req->adapter->ccw_device->dev,
+			dev_warn(&req->adapter->ccw_device->dev,
 				 "The remote port 0x%016Lx could not be "
 				 "opened. Disabling it.\n", port->wwpn);
-			zfcp_erp_port_failed(port, 32, fsf_req);
-			fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
-			break;
-		default:
+			zfcp_erp_port_failed(port, 32, req);
+			req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 			break;
 		}
 		break;
-
 	case FSF_GOOD:
-		/* save port handle assigned by FSF */
 		port->handle = header->port_handle;
-		/* mark port as open */
 		atomic_set_mask(ZFCP_STATUS_COMMON_OPEN |
 				ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
 		atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
 		                  ZFCP_STATUS_COMMON_ACCESS_BOXED,
 		                  &port->status);
-		retval = 0;
 		/* check whether D_ID has changed during open */
 		/*
 		 * FIXME: This check is not airtight, as the FCP channel does
@@ -2021,227 +1471,168 @@ zfcp_fsf_open_port_handler(struct zfcp_f
 		 * another GID_PN straight after a port has been opened.
 		 * Alternately, an ADISC/PDISC ELS should suffice, as well.
 		 */
-		plogi = (struct fsf_plogi *) fsf_req->qtcb->bottom.support.els;
-		if (!atomic_test_mask(ZFCP_STATUS_PORT_NO_WWPN, &port->status))
-		{
-			if (fsf_req->qtcb->bottom.support.els1_length <
-			    sizeof (struct fsf_plogi)) {
-				/* skip sanity check and assume wwpn is ok */
-			} else {
-				if (plogi->serv_param.wwpn != port->wwpn) {
-					atomic_clear_mask(
-						ZFCP_STATUS_PORT_DID_DID,
-						&port->status);
-				} else {
-					port->wwnn = plogi->serv_param.wwnn;
-					zfcp_fc_plogi_evaluate(port, plogi);
-				}
+		if (atomic_read(&port->status) & ZFCP_STATUS_PORT_NO_WWPN)
+			break;
+
+		plogi = (struct fsf_plogi *) req->qtcb->bottom.support.els;
+		if (req->qtcb->bottom.support.els1_length >= sizeof(*plogi)) {
+			if (plogi->serv_param.wwpn != port->wwpn)
+				atomic_clear_mask(ZFCP_STATUS_PORT_DID_DID,
+						  &port->status);
+			else {
+				port->wwnn = plogi->serv_param.wwnn;
+				zfcp_fc_plogi_evaluate(port, plogi);
 			}
 		}
 		break;
-
 	case FSF_UNKNOWN_OP_SUBTYPE:
-		/* should never occure, subtype not set in zfcp_fsf_open_port */
-		fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
-		break;
-
-	default:
+		req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 		break;
 	}
 
- skip_fsfstatus:
+skip_fsfstatus:
 	atomic_clear_mask(ZFCP_STATUS_COMMON_OPENING, &port->status);
-	return retval;
 }
 
-/*
- * function:    zfcp_fsf_close_port
- *
- * purpose:     submit FSF command "close port"
- *
- * returns:     address of initiated FSF request
- *              NULL - request could not be initiated
+/**
+ * zfcp_fsf_open_port - create and send open port request
+ * @erp_action: pointer to struct zfcp_erp_action
+ * Returns: 0 on success, error otherwise
  */
-int
-zfcp_fsf_close_port(struct zfcp_erp_action *erp_action)
+int zfcp_fsf_open_port(struct zfcp_erp_action *erp_action)
 {
 	volatile struct qdio_buffer_element *sbale;
-	struct zfcp_fsf_req *fsf_req;
-	unsigned long lock_flags;
-	int retval = 0;
-
-	/* setup new FSF request */
-	retval = zfcp_fsf_req_create(erp_action->adapter,
-				     FSF_QTCB_CLOSE_PORT,
-				     ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP,
-				     erp_action->adapter->pool.fsf_req_erp,
-				     &lock_flags, &fsf_req);
-	if (retval < 0)
+	struct zfcp_adapter *adapter = erp_action->adapter;
+	struct zfcp_fsf_req *req;
+	int retval = -EIO;
+
+	spin_lock(&adapter->req_q.lock);
+	if (zfcp_fsf_req_sbal_get(adapter))
+		goto out;
+
+	req = zfcp_fsf_req_create(adapter,
+				  FSF_QTCB_OPEN_PORT_WITH_DID,
+				  ZFCP_REQ_AUTO_CLEANUP,
+				  adapter->pool.fsf_req_erp);
+	if (unlikely(IS_ERR(req))) {
+		retval = PTR_ERR(req);
 		goto out;
+	}
 
-	sbale = zfcp_qdio_sbale_req(fsf_req);
+	sbale = zfcp_qdio_sbale_req(req);
         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
 
-	atomic_set_mask(ZFCP_STATUS_COMMON_CLOSING, &erp_action->port->status);
-	fsf_req->data = (unsigned long) erp_action->port;
-	fsf_req->erp_action = erp_action;
-	fsf_req->qtcb->header.port_handle = erp_action->port->handle;
-	fsf_req->erp_action = erp_action;
-	erp_action->fsf_req = fsf_req;
+	req->handler = zfcp_fsf_open_port_handler;
+	req->qtcb->bottom.support.d_id = erp_action->port->d_id;
+	req->data = erp_action->port;
+	req->erp_action = erp_action;
+	erp_action->fsf_req = req;
+	atomic_set_mask(ZFCP_STATUS_COMMON_OPENING, &erp_action->port->status);
 
-	zfcp_erp_start_timer(fsf_req);
-	retval = zfcp_fsf_req_send(fsf_req);
+	zfcp_erp_start_timer(req);
+	retval = zfcp_fsf_req_send(req);
 	if (retval) {
-		zfcp_fsf_req_free(fsf_req);
+		zfcp_fsf_req_free(req);
 		erp_action->fsf_req = NULL;
-		goto out;
 	}
-
- out:
-	write_unlock_irqrestore(&erp_action->adapter->req_q.lock, lock_flags);
+out:
+	spin_unlock(&adapter->req_q.lock);
 	return retval;
 }
 
-/*
- * function:    zfcp_fsf_close_port_handler
- *
- * purpose:     is called for finished Close Port FSF command
- *
- * returns:
- */
-static int
-zfcp_fsf_close_port_handler(struct zfcp_fsf_req *fsf_req)
+static void zfcp_fsf_close_port_handler(struct zfcp_fsf_req *req)
 {
-	int retval = -EINVAL;
-	struct zfcp_port *port;
-
-	port = (struct zfcp_port *) fsf_req->data;
+	struct zfcp_port *port = req->data;
 
-	if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
-		/* don't change port status in our bookkeeping */
+	if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
 		goto skip_fsfstatus;
-	}
-
-	/* evaluate FSF status in QTCB */
-	switch (fsf_req->qtcb->header.fsf_status) {
 
+	switch (req->qtcb->header.fsf_status) {
 	case FSF_PORT_HANDLE_NOT_VALID:
-		zfcp_erp_adapter_reopen(port->adapter, 0, 107, fsf_req);
-		fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
+		zfcp_erp_adapter_reopen(port->adapter, 0, 107, req);
+		req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 		break;
-
 	case FSF_ADAPTER_STATUS_AVAILABLE:
-		/* Note: FSF has actually closed the port in this case.
-		 * The status code is just daft. Fingers crossed for a change
-		 */
-		retval = 0;
 		break;
-
 	case FSF_GOOD:
-		zfcp_erp_modify_port_status(port, 33, fsf_req,
+		zfcp_erp_modify_port_status(port, 33, req,
 					    ZFCP_STATUS_COMMON_OPEN,
 					    ZFCP_CLEAR);
-		retval = 0;
 		break;
 	}
 
- skip_fsfstatus:
+skip_fsfstatus:
 	atomic_clear_mask(ZFCP_STATUS_COMMON_CLOSING, &port->status);
-	return retval;
 }
 
-/*
- * function:    zfcp_fsf_close_physical_port
- *
- * purpose:     submit FSF command "close physical port"
- *
- * returns:     address of initiated FSF request
- *              NULL - request could not be initiated
+/**
+ * zfcp_fsf_close_port - create and send close port request
+ * @erp_action: pointer to struct zfcp_erp_action
+ * Returns: 0 on success, error otherwise
  */
-int
-zfcp_fsf_close_physical_port(struct zfcp_erp_action *erp_action)
+int zfcp_fsf_close_port(struct zfcp_erp_action *erp_action)
 {
 	volatile struct qdio_buffer_element *sbale;
-	struct zfcp_fsf_req *fsf_req;
-	unsigned long lock_flags;
-	int retval = 0;
-
-	/* setup new FSF request */
-	retval = zfcp_fsf_req_create(erp_action->adapter,
-				     FSF_QTCB_CLOSE_PHYSICAL_PORT,
-				     ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP,
-				     erp_action->adapter->pool.fsf_req_erp,
-				     &lock_flags, &fsf_req);
-	if (retval < 0)
+	struct zfcp_adapter *adapter = erp_action->adapter;
+	struct zfcp_fsf_req *req;
+	int retval = -EIO;
+
+	spin_lock(&adapter->req_q.lock);
+	if (zfcp_fsf_req_sbal_get(adapter))
+		goto out;
+
+	req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_PORT,
+				  ZFCP_REQ_AUTO_CLEANUP,
+				  adapter->pool.fsf_req_erp);
+	if (unlikely(IS_ERR(req))) {
+		retval = PTR_ERR(req);
 		goto out;
+	}
 
-	sbale = zfcp_qdio_sbale_req(fsf_req);
+	sbale = zfcp_qdio_sbale_req(req);
 	sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
 	sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
 
-	/* mark port as being closed */
-	atomic_set_mask(ZFCP_STATUS_PORT_PHYS_CLOSING,
-			&erp_action->port->status);
-	/* save a pointer to this port */
-	fsf_req->data = (unsigned long) erp_action->port;
-	fsf_req->qtcb->header.port_handle = erp_action->port->handle;
-	fsf_req->erp_action = erp_action;
-	erp_action->fsf_req = fsf_req;
+	req->handler = zfcp_fsf_close_port_handler;
+	req->data = erp_action->port;
+	req->erp_action = erp_action;
+	req->qtcb->header.port_handle = erp_action->port->handle;
+	erp_action->fsf_req = req;
+	atomic_set_mask(ZFCP_STATUS_COMMON_CLOSING, &erp_action->port->status);
 
-	zfcp_erp_start_timer(fsf_req);
-	retval = zfcp_fsf_req_send(fsf_req);
+	zfcp_erp_start_timer(req);
+	retval = zfcp_fsf_req_send(req);
 	if (retval) {
-		zfcp_fsf_req_free(fsf_req);
+		zfcp_fsf_req_free(req);
 		erp_action->fsf_req = NULL;
-		goto out;
 	}
-
- out:
-	write_unlock_irqrestore(&erp_action->adapter->req_q.lock, lock_flags);
+out:
+	spin_unlock(&adapter->req_q.lock);
 	return retval;
 }
 
-/*
- * function:    zfcp_fsf_close_physical_port_handler
- *
- * purpose:     is called for finished Close Physical Port FSF command
- *
- * returns:
- */
-static int
-zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *fsf_req)
+static void zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *req)
 {
-	int retval = -EINVAL;
-	struct zfcp_port *port;
+	struct zfcp_port *port = req->data;
+	struct fsf_qtcb_header *header = &req->qtcb->header;
 	struct zfcp_unit *unit;
-	struct fsf_qtcb_header *header;
 
-	port = (struct zfcp_port *) fsf_req->data;
-	header = &fsf_req->qtcb->header;
-
-	if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
-		/* don't change port status in our bookkeeping */
+	if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
 		goto skip_fsfstatus;
-	}
 
-	/* evaluate FSF status in QTCB */
 	switch (header->fsf_status) {
-
 	case FSF_PORT_HANDLE_NOT_VALID:
-		zfcp_erp_adapter_reopen(port->adapter, 0, 108, fsf_req);
-		fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
+		zfcp_erp_adapter_reopen(port->adapter, 0, 108, req);
+		req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 		break;
-
 	case FSF_ACCESS_DENIED:
-		zfcp_fsf_access_denied_port(fsf_req, port);
+		zfcp_fsf_access_denied_port(req, port);
 		break;
-
 	case FSF_PORT_BOXED:
-		zfcp_erp_port_boxed(port, 50, fsf_req);
-		fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR |
-			ZFCP_STATUS_FSFREQ_RETRY;
-
+		zfcp_erp_port_boxed(port, 50, req);
+		req->status |= ZFCP_STATUS_FSFREQ_ERROR |
+			       ZFCP_STATUS_FSFREQ_RETRY;
 		/* can't use generic zfcp_erp_modify_port_status because
 		 * ZFCP_STATUS_COMMON_OPEN must not be reset for the port */
 		atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
@@ -2249,120 +1640,88 @@ zfcp_fsf_close_physical_port_handler(str
 			atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
 					  &unit->status);
 		break;
-
 	case FSF_ADAPTER_STATUS_AVAILABLE:
 		switch (header->fsf_status_qual.word[0]) {
 		case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
-			/* This will now be escalated by ERP */
-			fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
-			break;
+			/* fall through */
 		case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
-			/* ERP strategy will escalate */
-			fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
+			req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 			break;
 		}
 		break;
-
 	case FSF_GOOD:
 		/* can't use generic zfcp_erp_modify_port_status because
 		 * ZFCP_STATUS_COMMON_OPEN must not be reset for the port
 		 */
 		atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
 		list_for_each_entry(unit, &port->unit_list_head, list)
-		    atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
-		retval = 0;
+			atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
+					  &unit->status);
 		break;
 	}
-
- skip_fsfstatus:
+skip_fsfstatus:
 	atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_CLOSING, &port->status);
-	return retval;
 }
 
-/*
- * function:    zfcp_fsf_open_unit
- *
- * purpose:
- *
- * returns:
- *
- * assumptions:	This routine does not check whether the associated
- *		remote port has already been opened. This should be
- *		done by calling routines. Otherwise some status
- *		may be presented by FSF
+/**
+ * zfcp_fsf_close_physical_port - close physical port
+ * @erp_action: pointer to struct zfcp_erp_action
+ * Returns: 0 on success
  */
-int
-zfcp_fsf_open_unit(struct zfcp_erp_action *erp_action)
+int zfcp_fsf_close_physical_port(struct zfcp_erp_action *erp_action)
 {
 	volatile struct qdio_buffer_element *sbale;
-	struct zfcp_fsf_req *fsf_req;
-	unsigned long lock_flags;
-	int retval = 0;
-
-	/* setup new FSF request */
-	retval = zfcp_fsf_req_create(erp_action->adapter,
-				     FSF_QTCB_OPEN_LUN,
-				     ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP,
-				     erp_action->adapter->pool.fsf_req_erp,
-				     &lock_flags, &fsf_req);
-	if (retval < 0)
+	struct zfcp_adapter *adapter = erp_action->adapter;
+	struct zfcp_fsf_req *req;
+	int retval = -EIO;
+
+	spin_lock(&adapter->req_q.lock);
+	if (zfcp_fsf_req_sbal_get(adapter))
 		goto out;
 
-	sbale = zfcp_qdio_sbale_req(fsf_req);
-        sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
-        sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
+	req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_PHYSICAL_PORT,
+				  ZFCP_REQ_AUTO_CLEANUP,
+				  adapter->pool.fsf_req_erp);
+	if (unlikely(IS_ERR(req))) {
+		retval = PTR_ERR(req);
+		goto out;
+	}
 
-	fsf_req->qtcb->header.port_handle = erp_action->port->handle;
-	fsf_req->qtcb->bottom.support.fcp_lun =	erp_action->unit->fcp_lun;
-	if (!(erp_action->adapter->connection_features & FSF_FEATURE_NPIV_MODE))
-		fsf_req->qtcb->bottom.support.option =
-			FSF_OPEN_LUN_SUPPRESS_BOXING;
-	atomic_set_mask(ZFCP_STATUS_COMMON_OPENING, &erp_action->unit->status);
-	fsf_req->data = (unsigned long) erp_action->unit;
-	fsf_req->erp_action = erp_action;
-	erp_action->fsf_req = fsf_req;
+	sbale = zfcp_qdio_sbale_req(req);
+	sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
+	sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
 
-	zfcp_erp_start_timer(fsf_req);
-	retval = zfcp_fsf_req_send(erp_action->fsf_req);
+	req->data = erp_action->port;
+	req->qtcb->header.port_handle = erp_action->port->handle;
+	req->erp_action = erp_action;
+	req->handler = zfcp_fsf_close_physical_port_handler;
+	erp_action->fsf_req = req;
+	atomic_set_mask(ZFCP_STATUS_PORT_PHYS_CLOSING,
+			&erp_action->port->status);
+
+	zfcp_erp_start_timer(req);
+	retval = zfcp_fsf_req_send(req);
 	if (retval) {
-		zfcp_fsf_req_free(fsf_req);
+		zfcp_fsf_req_free(req);
 		erp_action->fsf_req = NULL;
-		goto out;
 	}
- out:
-	write_unlock_irqrestore(&erp_action->adapter->req_q.lock, lock_flags);
+out:
+	spin_unlock(&adapter->req_q.lock);
 	return retval;
 }
 
-/*
- * function:    zfcp_fsf_open_unit_handler
- *
- * purpose:	is called for finished Open LUN command
- *
- * returns:
- */
-static int
-zfcp_fsf_open_unit_handler(struct zfcp_fsf_req *fsf_req)
+static void zfcp_fsf_open_unit_handler(struct zfcp_fsf_req *req)
 {
-	int retval = -EINVAL;
-	struct zfcp_adapter *adapter;
-	struct zfcp_unit *unit;
-	struct fsf_qtcb_header *header;
-	struct fsf_qtcb_bottom_support *bottom;
-	struct fsf_queue_designator *queue_designator;
+	struct zfcp_adapter *adapter = req->adapter;
+	struct zfcp_unit *unit = req->data;
+	struct fsf_qtcb_header *header = &req->qtcb->header;
+	struct fsf_qtcb_bottom_support *bottom = &req->qtcb->bottom.support;
+	struct fsf_queue_designator *queue_designator =
+				&header->fsf_status_qual.fsf_queue_designator;
 	int exclusive, readwrite;
 
-	unit = (struct zfcp_unit *) fsf_req->data;
-
-	if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
-		/* don't change unit status in our bookkeeping */
+	if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
 		goto skip_fsfstatus;
-	}
-
-	adapter = fsf_req->adapter;
-	header = &fsf_req->qtcb->header;
-	bottom = &fsf_req->qtcb->bottom.support;
-	queue_designator = &header->fsf_status_qual.fsf_queue_designator;
 
 	atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
 			  ZFCP_STATUS_COMMON_ACCESS_BOXED |
@@ -2370,32 +1729,25 @@ zfcp_fsf_open_unit_handler(struct zfcp_f
 			  ZFCP_STATUS_UNIT_READONLY,
 			  &unit->status);
 
-	/* evaluate FSF status in QTCB */
 	switch (header->fsf_status) {
 
 	case FSF_PORT_HANDLE_NOT_VALID:
-		zfcp_erp_adapter_reopen(unit->port->adapter, 0, 109, fsf_req);
-		fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
-		break;
-
+		zfcp_erp_adapter_reopen(unit->port->adapter, 0, 109, req);
+		/* fall through */
 	case FSF_LUN_ALREADY_OPEN:
-		fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 		break;
-
 	case FSF_ACCESS_DENIED:
-		zfcp_fsf_access_denied_unit(fsf_req, unit);
+		zfcp_fsf_access_denied_unit(req, unit);
 		atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status);
 		atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status);
 		break;
-
 	case FSF_PORT_BOXED:
-		zfcp_erp_port_boxed(unit->port, 51, fsf_req);
-		fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR |
-			ZFCP_STATUS_FSFREQ_RETRY;
+		zfcp_erp_port_boxed(unit->port, 51, req);
+		req->status |= ZFCP_STATUS_FSFREQ_ERROR |
+			       ZFCP_STATUS_FSFREQ_RETRY;
 		break;
-
 	case FSF_LUN_SHARING_VIOLATION:
-		if (header->fsf_status_qual.word[0] != 0) {
+		if (header->fsf_status_qual.word[0])
 			dev_warn(&adapter->ccw_device->dev,
 				 "FCP-LUN 0x%Lx at the remote port "
 				 "with WWPN 0x%Lx "
@@ -2405,47 +1757,37 @@ zfcp_fsf_open_unit_handler(struct zfcp_f
 				 unit->port->wwpn,
 				 queue_designator->hla,
 				 queue_designator->cssid);
-		} else
+		else
 			zfcp_act_eval_err(adapter,
 					  header->fsf_status_qual.word[2]);
-		zfcp_erp_unit_access_denied(unit, 60, fsf_req);
+		zfcp_erp_unit_access_denied(unit, 60, req);
 		atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status);
 		atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status);
-		fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
+		req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 		break;
-
 	case FSF_MAXIMUM_NUMBER_OF_LUNS_EXCEEDED:
-		dev_warn(&fsf_req->adapter->ccw_device->dev,
+		dev_warn(&adapter->ccw_device->dev,
 			 "The adapter ran out of resources. There is no "
 			 "handle available for unit 0x%016Lx on port 0x%016Lx.",
 			 unit->fcp_lun, unit->port->wwpn);
-		zfcp_erp_unit_failed(unit, 34, fsf_req);
-		fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
+		zfcp_erp_unit_failed(unit, 34, req);
+		/* fall through */
+	case FSF_INVALID_COMMAND_OPTION:
+		req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 		break;
-
 	case FSF_ADAPTER_STATUS_AVAILABLE:
 		switch (header->fsf_status_qual.word[0]) {
 		case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
-			/* Re-establish link to port */
 			zfcp_test_link(unit->port);
-			fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
-			break;
+			/* fall through */
 		case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
-			/* ERP strategy will escalate */
-			fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
+			req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 			break;
 		}
 		break;
 
-	case FSF_INVALID_COMMAND_OPTION:
-		fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
-		retval = -EINVAL;
-		break;
-
 	case FSF_GOOD:
-		/* save LUN handle assigned by FSF */
 		unit->handle = header->lun_handle;
-		/* mark unit as open */
 		atomic_set_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
 
 		if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE) &&
@@ -2463,635 +1805,256 @@ zfcp_fsf_open_unit_handler(struct zfcp_f
 			if (!readwrite) {
                 		atomic_set_mask(ZFCP_STATUS_UNIT_READONLY,
 						&unit->status);
-				dev_info(&fsf_req->adapter->ccw_device->dev,
+				dev_info(&adapter->ccw_device->dev,
 					 "Read-only access for unit 0x%016Lx "
 					 "on port 0x%016Lx.\n",
 					 unit->fcp_lun, unit->port->wwpn);
         		}
 
         		if (exclusive && !readwrite) {
-				dev_err(&fsf_req->adapter->ccw_device->dev,
+				dev_err(&adapter->ccw_device->dev,
 					"Exclusive access of read-only unit "
 					"0x%016Lx on port 0x%016Lx not "
 					"supported, disabling unit.\n",
 					unit->fcp_lun, unit->port->wwpn);
-				zfcp_erp_unit_failed(unit, 35, fsf_req);
-				fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
-				zfcp_erp_unit_shutdown(unit, 0, 80, fsf_req);
+				zfcp_erp_unit_failed(unit, 35, req);
+				req->status |= ZFCP_STATUS_FSFREQ_ERROR;
+				zfcp_erp_unit_shutdown(unit, 0, 80, req);
         		} else if (!exclusive && readwrite) {
-				dev_err(&fsf_req->adapter->ccw_device->dev,
+				dev_err(&adapter->ccw_device->dev,
 					"Shared access of read-write unit "
 					"0x%016Lx on port 0x%016Lx not "
 					"supported, disabling unit.\n",
 					unit->fcp_lun, unit->port->wwpn);
-				zfcp_erp_unit_failed(unit, 36, fsf_req);
-				fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
-				zfcp_erp_unit_shutdown(unit, 0, 81, fsf_req);
+				zfcp_erp_unit_failed(unit, 36, req);
+				req->status |= ZFCP_STATUS_FSFREQ_ERROR;
+				zfcp_erp_unit_shutdown(unit, 0, 81, req);
         		}
 		}
-
-		retval = 0;
 		break;
 	}
 
- skip_fsfstatus:
+skip_fsfstatus:
 	atomic_clear_mask(ZFCP_STATUS_COMMON_OPENING, &unit->status);
-	return retval;
 }
 
-/*
- * function:    zfcp_fsf_close_unit
- *
- * purpose:
- *
- * returns:	address of fsf_req - request successfully initiated
- *		NULL -
- *
- * assumptions: This routine does not check whether the associated
- *              remote port/lun has already been opened. This should be
- *              done by calling routines. Otherwise some status
- *              may be presented by FSF
+/**
+ * zfcp_fsf_open_unit - open unit
+ * @erp_action: pointer to struct zfcp_erp_action
+ * Returns: 0 on success, error otherwise
  */
-int
-zfcp_fsf_close_unit(struct zfcp_erp_action *erp_action)
+int zfcp_fsf_open_unit(struct zfcp_erp_action *erp_action)
 {
 	volatile struct qdio_buffer_element *sbale;
-	struct zfcp_fsf_req *fsf_req;
-	unsigned long lock_flags;
-	int retval = 0;
-
-	/* setup new FSF request */
-	retval = zfcp_fsf_req_create(erp_action->adapter,
-				     FSF_QTCB_CLOSE_LUN,
-				     ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP,
-				     erp_action->adapter->pool.fsf_req_erp,
-				     &lock_flags, &fsf_req);
-	if (retval < 0)
+	struct zfcp_adapter *adapter = erp_action->adapter;
+	struct zfcp_fsf_req *req;
+	int retval = -EIO;
+
+	spin_lock(&adapter->req_q.lock);
+	if (zfcp_fsf_req_sbal_get(adapter))
+		goto out;
+
+	req = zfcp_fsf_req_create(adapter, FSF_QTCB_OPEN_LUN,
+				  ZFCP_REQ_AUTO_CLEANUP,
+				  adapter->pool.fsf_req_erp);
+	if (unlikely(IS_ERR(req))) {
+		retval = PTR_ERR(req);
 		goto out;
+	}
 
-	sbale = zfcp_qdio_sbale_req(fsf_req);
+	sbale = zfcp_qdio_sbale_req(req);
         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
 
-	fsf_req->qtcb->header.port_handle = erp_action->port->handle;
-	fsf_req->qtcb->header.lun_handle = erp_action->unit->handle;
-	atomic_set_mask(ZFCP_STATUS_COMMON_CLOSING, &erp_action->unit->status);
-	fsf_req->data = (unsigned long) erp_action->unit;
-	fsf_req->erp_action = erp_action;
-	erp_action->fsf_req = fsf_req;
+	req->qtcb->header.port_handle = erp_action->port->handle;
+	req->qtcb->bottom.support.fcp_lun = erp_action->unit->fcp_lun;
+	req->handler = zfcp_fsf_open_unit_handler;
+	req->data = erp_action->unit;
+	req->erp_action = erp_action;
+	erp_action->fsf_req = req;
+
+	if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE))
+		req->qtcb->bottom.support.option = FSF_OPEN_LUN_SUPPRESS_BOXING;
 
-	zfcp_erp_start_timer(fsf_req);
-	retval = zfcp_fsf_req_send(erp_action->fsf_req);
+	atomic_set_mask(ZFCP_STATUS_COMMON_OPENING, &erp_action->unit->status);
+
+	zfcp_erp_start_timer(req);
+	retval = zfcp_fsf_req_send(req);
 	if (retval) {
-		zfcp_fsf_req_free(fsf_req);
+		zfcp_fsf_req_free(req);
 		erp_action->fsf_req = NULL;
-		goto out;
 	}
-
- out:
-	write_unlock_irqrestore(&erp_action->adapter->req_q.lock, lock_flags);
+out:
+	spin_unlock(&adapter->req_q.lock);
 	return retval;
 }
 
-/*
- * function:    zfcp_fsf_close_unit_handler
- *
- * purpose:     is called for finished Close LUN FSF command
- *
- * returns:
- */
-static int
-zfcp_fsf_close_unit_handler(struct zfcp_fsf_req *fsf_req)
+static void zfcp_fsf_close_unit_handler(struct zfcp_fsf_req *req)
 {
-	int retval = -EINVAL;
-	struct zfcp_unit *unit;
+	struct zfcp_unit *unit = req->data;
 
-	unit = (struct zfcp_unit *) fsf_req->data;
-
-	if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
-		/* don't change unit status in our bookkeeping */
+	if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
 		goto skip_fsfstatus;
-	}
-
-	/* evaluate FSF status in QTCB */
-	switch (fsf_req->qtcb->header.fsf_status) {
 
+	switch (req->qtcb->header.fsf_status) {
 	case FSF_PORT_HANDLE_NOT_VALID:
-		zfcp_erp_adapter_reopen(unit->port->adapter, 0, 110, fsf_req);
-		fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
+		zfcp_erp_adapter_reopen(unit->port->adapter, 0, 110, req);
+		req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 		break;
-
 	case FSF_LUN_HANDLE_NOT_VALID:
-		zfcp_erp_port_reopen(unit->port, 0, 111, fsf_req);
-		fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
+		zfcp_erp_port_reopen(unit->port, 0, 111, req);
+		req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 		break;
-
 	case FSF_PORT_BOXED:
-		zfcp_erp_port_boxed(unit->port, 52, fsf_req);
-		fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR |
-			ZFCP_STATUS_FSFREQ_RETRY;
+		zfcp_erp_port_boxed(unit->port, 52, req);
+		req->status |= ZFCP_STATUS_FSFREQ_ERROR |
+			       ZFCP_STATUS_FSFREQ_RETRY;
 		break;
-
 	case FSF_ADAPTER_STATUS_AVAILABLE:
-		switch (fsf_req->qtcb->header.fsf_status_qual.word[0]) {
+		switch (req->qtcb->header.fsf_status_qual.word[0]) {
 		case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
-			/* re-establish link to port */
 			zfcp_test_link(unit->port);
-			fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
-			break;
+			/* fall through */
 		case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
-			/* ERP strategy will escalate */
-			fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
-			break;
-		default:
+			req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 			break;
 		}
 		break;
-
 	case FSF_GOOD:
-		/* mark unit as closed */
 		atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
-		retval = 0;
 		break;
 	}
-
- skip_fsfstatus:
+skip_fsfstatus:
 	atomic_clear_mask(ZFCP_STATUS_COMMON_CLOSING, &unit->status);
-	return retval;
 }
 
 /**
- * zfcp_fsf_send_fcp_command_task - initiate an FCP command (for a SCSI command)
- * @adapter: adapter where scsi command is issued
- * @unit: unit where command is sent to
- * @scsi_cmnd: scsi command to be sent
- * @timer: timer to be started when request is initiated
- * @req_flags: flags for fsf_request
+ * zfcp_fsf_close_unit - close zfcp unit
+ * @erp_action: pointer to struct zfcp_unit
+ * Returns: 0 on success, error otherwise
  */
-int
-zfcp_fsf_send_fcp_command_task(struct zfcp_adapter *adapter,
-			       struct zfcp_unit *unit,
-			       struct scsi_cmnd * scsi_cmnd,
-			       int use_timer, int req_flags)
-{
-	struct zfcp_fsf_req *fsf_req = NULL;
-	struct fcp_cmnd_iu *fcp_cmnd_iu;
-	unsigned int sbtype;
-	unsigned long lock_flags;
-	int real_bytes = 0;
-	int retval = 0;
-	int mask;
-
-	/* setup new FSF request */
-	retval = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND, req_flags,
-				     adapter->pool.fsf_req_scsi,
-				     &lock_flags, &fsf_req);
-	if (unlikely(retval < 0))
-		goto failed_req_create;
-
-	if (unlikely(!atomic_test_mask(ZFCP_STATUS_COMMON_UNBLOCKED,
-			&unit->status))) {
-		retval = -EBUSY;
-		goto unit_blocked;
-	}
-
-	zfcp_unit_get(unit);
-	fsf_req->unit = unit;
-
-	/* associate FSF request with SCSI request (for look up on abort) */
-	scsi_cmnd->host_scribble = (unsigned char *) fsf_req->req_id;
-
-	/* associate SCSI command with FSF request */
-	fsf_req->data = (unsigned long) scsi_cmnd;
-
-	/* set handles of unit and its parent port in QTCB */
-	fsf_req->qtcb->header.lun_handle = unit->handle;
-	fsf_req->qtcb->header.port_handle = unit->port->handle;
-
-	/* FSF does not define the structure of the FCP_CMND IU */
-	fcp_cmnd_iu = (struct fcp_cmnd_iu *)
-	    &(fsf_req->qtcb->bottom.io.fcp_cmnd);
-
-	/*
-	 * set depending on data direction:
-	 *      data direction bits in SBALE (SB Type)
-	 *      data direction bits in QTCB
-	 *      data direction bits in FCP_CMND IU
-	 */
-	switch (scsi_cmnd->sc_data_direction) {
-	case DMA_NONE:
-		fsf_req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
-		/*
-		 * FIXME(qdio):
-		 * what is the correct type for commands
-		 * without 'real' data buffers?
-		 */
-		sbtype = SBAL_FLAGS0_TYPE_READ;
-		break;
-	case DMA_FROM_DEVICE:
-		fsf_req->qtcb->bottom.io.data_direction = FSF_DATADIR_READ;
-		sbtype = SBAL_FLAGS0_TYPE_READ;
-		fcp_cmnd_iu->rddata = 1;
-		break;
-	case DMA_TO_DEVICE:
-		fsf_req->qtcb->bottom.io.data_direction = FSF_DATADIR_WRITE;
-		sbtype = SBAL_FLAGS0_TYPE_WRITE;
-		fcp_cmnd_iu->wddata = 1;
-		break;
-	case DMA_BIDIRECTIONAL:
-	default:
-		/*
-		 * dummy, catch this condition earlier
-		 * in zfcp_scsi_queuecommand
-		 */
-		goto failed_scsi_cmnd;
-	}
-
-	/* set FC service class in QTCB (3 per default) */
-	fsf_req->qtcb->bottom.io.service_class = ZFCP_FC_SERVICE_CLASS_DEFAULT;
-
-	/* set FCP_LUN in FCP_CMND IU in QTCB */
-	fcp_cmnd_iu->fcp_lun = unit->fcp_lun;
-
-	mask = ZFCP_STATUS_UNIT_READONLY | ZFCP_STATUS_UNIT_SHARED;
-
-	/* set task attributes in FCP_CMND IU in QTCB */
-	if (likely((scsi_cmnd->device->simple_tags) ||
-		   (atomic_test_mask(mask, &unit->status))))
-		fcp_cmnd_iu->task_attribute = SIMPLE_Q;
-	else
-		fcp_cmnd_iu->task_attribute = UNTAGGED;
-
-	/* set additional length of FCP_CDB in FCP_CMND IU in QTCB, if needed */
-	if (unlikely(scsi_cmnd->cmd_len > FCP_CDB_LENGTH))
-		fcp_cmnd_iu->add_fcp_cdb_length
-		    = (scsi_cmnd->cmd_len - FCP_CDB_LENGTH) >> 2;
-	/*
-	 * copy SCSI CDB (including additional length, if any) to
-	 * FCP_CDB in FCP_CMND IU in QTCB
-	 */
-	memcpy(fcp_cmnd_iu->fcp_cdb, scsi_cmnd->cmnd, scsi_cmnd->cmd_len);
-
-	/* FCP CMND IU length in QTCB */
-	fsf_req->qtcb->bottom.io.fcp_cmnd_length =
-		sizeof (struct fcp_cmnd_iu) +
-		fcp_cmnd_iu->add_fcp_cdb_length + sizeof (fcp_dl_t);
-
-	/* generate SBALEs from data buffer */
-	real_bytes = zfcp_qdio_sbals_from_sg(fsf_req, sbtype,
-					     scsi_sglist(scsi_cmnd),
-					     ZFCP_MAX_SBALS_PER_REQ);
-	if (unlikely(real_bytes < 0)) {
-		if (fsf_req->sbal_number < ZFCP_MAX_SBALS_PER_REQ)
-			retval = -EIO;
-		else {
-			dev_err(&adapter->ccw_device->dev,
-				"SCSI request too large. "
-				"Shutting down unit 0x%016Lx on port "
-				"0x%016Lx.\n", unit->fcp_lun,
-				unit->port->wwpn);
-			zfcp_erp_unit_shutdown(unit, 0, 131, fsf_req);
-			retval = -EINVAL;
-		}
-		goto no_fit;
-	}
-
-	/* set length of FCP data length in FCP_CMND IU in QTCB */
-	zfcp_set_fcp_dl(fcp_cmnd_iu, real_bytes);
-
-	if (use_timer)
-		zfcp_fsf_start_timer(fsf_req, ZFCP_FSF_REQUEST_TIMEOUT);
-
-	retval = zfcp_fsf_req_send(fsf_req);
-	if (unlikely(retval < 0))
-		goto send_failed;
-
-	goto success;
-
- send_failed:
- no_fit:
- failed_scsi_cmnd:
-	zfcp_unit_put(unit);
- unit_blocked:
-	zfcp_fsf_req_free(fsf_req);
-	fsf_req = NULL;
-	scsi_cmnd->host_scribble = NULL;
- success:
- failed_req_create:
-	write_unlock_irqrestore(&adapter->req_q.lock, lock_flags);
-	return retval;
-}
-
-struct zfcp_fsf_req *
-zfcp_fsf_send_fcp_command_task_management(struct zfcp_adapter *adapter,
-					  struct zfcp_unit *unit,
-					  u8 tm_flags, int req_flags)
+int zfcp_fsf_close_unit(struct zfcp_erp_action *erp_action)
 {
-	struct zfcp_fsf_req *fsf_req = NULL;
-	int retval = 0;
-	struct fcp_cmnd_iu *fcp_cmnd_iu;
-	unsigned long lock_flags;
 	volatile struct qdio_buffer_element *sbale;
+	struct zfcp_adapter *adapter = erp_action->adapter;
+	struct zfcp_fsf_req *req;
+	int retval = -EIO;
 
-	/* setup new FSF request */
-	retval = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND, req_flags,
-				     adapter->pool.fsf_req_scsi,
-				     &lock_flags, &fsf_req);
-	if (retval < 0)
+	spin_lock(&adapter->req_q.lock);
+	if (zfcp_fsf_req_sbal_get(adapter))
 		goto out;
+	req = zfcp_fsf_req_create(adapter, FSF_QTCB_CLOSE_LUN,
+				  ZFCP_REQ_AUTO_CLEANUP,
+				  adapter->pool.fsf_req_erp);
+	if (unlikely(IS_ERR(req))) {
+		retval = PTR_ERR(req);
+		goto out;
+	}
 
-	if (unlikely(!atomic_test_mask(ZFCP_STATUS_COMMON_UNBLOCKED,
-			&unit->status)))
-		goto unit_blocked;
-
-	/*
-	 * Used to decide on proper handler in the return path,
-	 * could be either zfcp_fsf_send_fcp_command_task_handler or
-	 * zfcp_fsf_send_fcp_command_task_management_handler */
-
-	fsf_req->status |= ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT;
-
-	/*
-	 * hold a pointer to the unit being target of this
-	 * task management request
-	 */
-	fsf_req->data = (unsigned long) unit;
-
-	/* set FSF related fields in QTCB */
-	fsf_req->qtcb->header.lun_handle = unit->handle;
-	fsf_req->qtcb->header.port_handle = unit->port->handle;
-	fsf_req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
-	fsf_req->qtcb->bottom.io.service_class = ZFCP_FC_SERVICE_CLASS_DEFAULT;
-	fsf_req->qtcb->bottom.io.fcp_cmnd_length =
-		sizeof (struct fcp_cmnd_iu) + sizeof (fcp_dl_t);
-
-	sbale = zfcp_qdio_sbale_req(fsf_req);
-	sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE;
+	sbale = zfcp_qdio_sbale_req(req);
+	sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
 	sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
 
-	/* set FCP related fields in FCP_CMND IU in QTCB */
-	fcp_cmnd_iu = (struct fcp_cmnd_iu *)
-		&(fsf_req->qtcb->bottom.io.fcp_cmnd);
-	fcp_cmnd_iu->fcp_lun = unit->fcp_lun;
-	fcp_cmnd_iu->task_management_flags = tm_flags;
-
-	zfcp_fsf_start_timer(fsf_req, ZFCP_SCSI_ER_TIMEOUT);
-	retval = zfcp_fsf_req_send(fsf_req);
-	if (!retval)
-		goto out;
+	req->qtcb->header.port_handle = erp_action->port->handle;
+	req->qtcb->header.lun_handle = erp_action->unit->handle;
+	req->handler = zfcp_fsf_close_unit_handler;
+	req->data = erp_action->unit;
+	req->erp_action = erp_action;
+	erp_action->fsf_req = req;
+	atomic_set_mask(ZFCP_STATUS_COMMON_CLOSING, &erp_action->unit->status);
 
- unit_blocked:
-	zfcp_fsf_req_free(fsf_req);
-	fsf_req = NULL;
-
- out:
-	write_unlock_irqrestore(&adapter->req_q.lock, lock_flags);
-	return fsf_req;
+	zfcp_erp_start_timer(req);
+	retval = zfcp_fsf_req_send(req);
+	if (retval) {
+		zfcp_fsf_req_free(req);
+		erp_action->fsf_req = NULL;
+	}
+out:
+	spin_unlock(&adapter->req_q.lock);
+	return retval;
 }
 
 static void zfcp_fsf_update_lat(struct fsf_latency_record *lat_rec, u32 lat)
 {
 	lat_rec->sum += lat;
-	if (lat_rec->min > lat)
-		lat_rec->min = lat;
-	if (lat_rec->max < lat)
-		lat_rec->max = lat;
+	lat_rec->min = min(lat_rec->min, lat);
+	lat_rec->max = max(lat_rec->max, lat);
 }
 
-static void zfcp_fsf_req_latency(struct zfcp_fsf_req *fsf_req)
+static void zfcp_fsf_req_latency(struct zfcp_fsf_req *req)
 {
 	struct fsf_qual_latency_info *lat_inf;
 	struct latency_cont *lat;
-	struct zfcp_unit *unit;
+	struct zfcp_unit *unit = req->unit;
 	unsigned long flags;
 
-	lat_inf = &fsf_req->qtcb->prefix.prot_status_qual.latency_info;
-	unit = fsf_req->unit;
+	lat_inf = &req->qtcb->prefix.prot_status_qual.latency_info;
 
-	switch (fsf_req->qtcb->bottom.io.data_direction) {
+	switch (req->qtcb->bottom.io.data_direction) {
 	case FSF_DATADIR_READ:
 		lat = &unit->latencies.read;
 		break;
 	case FSF_DATADIR_WRITE:
 		lat = &unit->latencies.write;
 		break;
-	case FSF_DATADIR_CMND:
-		lat = &unit->latencies.cmd;
-		break;
-	default:
-		return;
-	}
-
-	spin_lock_irqsave(&unit->latencies.lock, flags);
-	zfcp_fsf_update_lat(&lat->channel, lat_inf->channel_lat);
-	zfcp_fsf_update_lat(&lat->fabric, lat_inf->fabric_lat);
-	lat->counter++;
-	spin_unlock_irqrestore(&unit->latencies.lock, flags);
-}
-
-/*
- * function:    zfcp_fsf_send_fcp_command_handler
- *
- * purpose:	is called for finished Send FCP Command
- *
- * returns:
- */
-static int
-zfcp_fsf_send_fcp_command_handler(struct zfcp_fsf_req *fsf_req)
-{
-	int retval = -EINVAL;
-	struct zfcp_unit *unit;
-	struct fsf_qtcb_header *header;
-
-	header = &fsf_req->qtcb->header;
-
-	if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT))
-		unit = (struct zfcp_unit *) fsf_req->data;
-	else
-		unit = fsf_req->unit;
-
-	if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
-		/* go directly to calls of special handlers */
-		goto skip_fsfstatus;
-	}
-
-	/* evaluate FSF status in QTCB */
-	switch (header->fsf_status) {
-
-	case FSF_PORT_HANDLE_NOT_VALID:
-		zfcp_erp_adapter_reopen(unit->port->adapter, 0, 112, fsf_req);
-		fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
-		break;
-
-	case FSF_LUN_HANDLE_NOT_VALID:
-		zfcp_erp_port_reopen(unit->port, 0, 113, fsf_req);
-		fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
-		break;
-
-	case FSF_HANDLE_MISMATCH:
-		zfcp_erp_adapter_reopen(unit->port->adapter, 0, 114, fsf_req);
-		fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
-		break;
-
-	case FSF_SERVICE_CLASS_NOT_SUPPORTED:
-		zfcp_fsf_class_not_supp(fsf_req);
-		break;
-
-	case FSF_FCPLUN_NOT_VALID:
-		zfcp_erp_port_reopen(unit->port, 0, 115, fsf_req);
-		fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
-		break;
-
-	case FSF_ACCESS_DENIED:
-		zfcp_fsf_access_denied_unit(fsf_req, unit);
-		break;
-
-	case FSF_DIRECTION_INDICATOR_NOT_VALID:
-		dev_err(&fsf_req->adapter->ccw_device->dev,
-			"Invalid data direction (%d) given for unit 0x%016Lx "
-			"on port 0x%016Lx, shutting down adapter.\n",
-			fsf_req->qtcb->bottom.io.data_direction,
-			unit->fcp_lun, unit->port->wwpn);
-		zfcp_erp_adapter_shutdown(unit->port->adapter, 0, 133, fsf_req);
-		fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
-		break;
-
-	case FSF_CMND_LENGTH_NOT_VALID:
-		dev_err(&fsf_req->adapter->ccw_device->dev,
-			"An invalid control-data-block length field (%d) "
-			"was found in a command for unit 0x%016Lx on port "
-			"0x%016Lx. Shutting down adapter.\n",
-			fsf_req->qtcb->bottom.io.fcp_cmnd_length,
-			unit->fcp_lun, unit->port->wwpn);
-		zfcp_erp_adapter_shutdown(unit->port->adapter, 0, 134, fsf_req);
-		fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
-		break;
-
-	case FSF_PORT_BOXED:
-		zfcp_erp_port_boxed(unit->port, 53, fsf_req);
-		fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR |
-			ZFCP_STATUS_FSFREQ_RETRY;
-		break;
-
-	case FSF_LUN_BOXED:
-		zfcp_erp_unit_boxed(unit, 54, fsf_req);
-		fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR
-			| ZFCP_STATUS_FSFREQ_RETRY;
-		break;
-
-	case FSF_ADAPTER_STATUS_AVAILABLE:
-		switch (header->fsf_status_qual.word[0]) {
-		case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
-			/* re-establish link to port */
- 			zfcp_test_link(unit->port);
-			break;
-		case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
-			/* FIXME(hw) need proper specs for proper action */
-			/* let scsi stack deal with retries and escalation */
-			break;
-		}
-		fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
-		break;
-
-	case FSF_GOOD:
-		break;
-
-	case FSF_FCP_RSP_AVAILABLE:
+	case FSF_DATADIR_CMND:
+		lat = &unit->latencies.cmd;
 		break;
+	default:
+		return;
 	}
 
- skip_fsfstatus:
-	if (fsf_req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT) {
-		retval =
-		    zfcp_fsf_send_fcp_command_task_management_handler(fsf_req);
-	} else {
-		retval = zfcp_fsf_send_fcp_command_task_handler(fsf_req);
-		fsf_req->unit = NULL;
-		zfcp_unit_put(unit);
-	}
-	return retval;
+	spin_lock_irqsave(&unit->latencies.lock, flags);
+	zfcp_fsf_update_lat(&lat->channel, lat_inf->channel_lat);
+	zfcp_fsf_update_lat(&lat->fabric, lat_inf->fabric_lat);
+	lat->counter++;
+	spin_unlock_irqrestore(&unit->latencies.lock, flags);
 }
 
-/*
- * function:    zfcp_fsf_send_fcp_command_task_handler
- *
- * purpose:	evaluates FCP_RSP IU
- *
- * returns:
- */
-static int
-zfcp_fsf_send_fcp_command_task_handler(struct zfcp_fsf_req *fsf_req)
+static void zfcp_fsf_send_fcp_command_task_handler(struct zfcp_fsf_req *req)
 {
-	int retval = 0;
-	struct scsi_cmnd *scpnt;
+	struct scsi_cmnd *scpnt = req->data;
 	struct fcp_rsp_iu *fcp_rsp_iu = (struct fcp_rsp_iu *)
-	    &(fsf_req->qtcb->bottom.io.fcp_rsp);
+	    &(req->qtcb->bottom.io.fcp_rsp);
 	u32 sns_len;
 	char *fcp_rsp_info = (unsigned char *) &fcp_rsp_iu[1];
 	unsigned long flags;
 
-	read_lock_irqsave(&fsf_req->adapter->abort_lock, flags);
-	scpnt = (struct scsi_cmnd *) fsf_req->data;
 	if (unlikely(!scpnt))
-		goto out;
+		return;
 
-	if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_ABORTED)) {
-		/* FIXME: (design) mid-layer should handle DID_ABORT like
-		 *        DID_SOFT_ERROR by retrying the request for devices
-		 *        that allow retries.
-		 */
+	read_lock_irqsave(&req->adapter->abort_lock, flags);
+
+	if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ABORTED)) {
 		set_host_byte(scpnt, DID_SOFT_ERROR);
 		set_driver_byte(scpnt, SUGGEST_RETRY);
 		goto skip_fsfstatus;
 	}
 
-	if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
+	if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
 		set_host_byte(scpnt, DID_ERROR);
 		goto skip_fsfstatus;
 	}
 
-	/* set message byte of result in SCSI command */
 	set_msg_byte(scpnt, COMMAND_COMPLETE);
 
-	/*
-	 * copy SCSI status code of FCP_STATUS of FCP_RSP IU to status byte
-	 * of result in SCSI command
-	 */
 	scpnt->result |= fcp_rsp_iu->scsi_status;
 
-	if (fsf_req->adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA)
-		zfcp_fsf_req_latency(fsf_req);
+	if (req->adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA)
+		zfcp_fsf_req_latency(req);
 
-	/* check FCP_RSP_INFO */
 	if (unlikely(fcp_rsp_iu->validity.bits.fcp_rsp_len_valid)) {
-		switch (fcp_rsp_info[3]) {
-		case RSP_CODE_GOOD:
-			/* ok, continue */
+		if (fcp_rsp_info[3] == RSP_CODE_GOOD)
 			set_host_byte(scpnt, DID_OK);
-			break;
-		case RSP_CODE_LENGTH_MISMATCH:
-			/* hardware bug */
-			set_host_byte(scpnt, DID_ERROR);
-			goto skip_fsfstatus;
-		case RSP_CODE_FIELD_INVALID:
-			/* driver or hardware bug */
-			set_host_byte(scpnt, DID_ERROR);
-			goto skip_fsfstatus;
-		case RSP_CODE_RO_MISMATCH:
-			/* hardware bug */
-			set_host_byte(scpnt, DID_ERROR);
-			goto skip_fsfstatus;
-		default:
-			/* invalid FCP response code */
+		else {
 			set_host_byte(scpnt, DID_ERROR);
 			goto skip_fsfstatus;
 		}
 	}
 
-	/* check for sense data */
 	if (unlikely(fcp_rsp_iu->validity.bits.fcp_sns_len_valid)) {
-		sns_len = FSF_FCP_RSP_SIZE -
-		    sizeof (struct fcp_rsp_iu) + fcp_rsp_iu->fcp_rsp_len;
+		sns_len = FSF_FCP_RSP_SIZE - sizeof(struct fcp_rsp_iu) +
+			  fcp_rsp_iu->fcp_rsp_len;
 		sns_len = min(sns_len, (u32) SCSI_SENSE_BUFFERSIZE);
 		sns_len = min(sns_len, fcp_rsp_iu->fcp_sns_len);
 
@@ -3099,382 +2062,372 @@ zfcp_fsf_send_fcp_command_task_handler(s
 		       zfcp_get_fcp_sns_info_ptr(fcp_rsp_iu), sns_len);
 	}
 
-	/* check for underrun */
 	if (unlikely(fcp_rsp_iu->validity.bits.fcp_resid_under)) {
 		scsi_set_resid(scpnt, fcp_rsp_iu->fcp_resid);
 		if (scsi_bufflen(scpnt) - scsi_get_resid(scpnt) <
 		    scpnt->underflow)
 			set_host_byte(scpnt, DID_ERROR);
 	}
-
- skip_fsfstatus:
+skip_fsfstatus:
 	if (scpnt->result != 0)
-		zfcp_scsi_dbf_event_result("erro", 3, fsf_req->adapter, scpnt, fsf_req);
+		zfcp_scsi_dbf_event_result("erro", 3, req->adapter, scpnt, req);
 	else if (scpnt->retries > 0)
-		zfcp_scsi_dbf_event_result("retr", 4, fsf_req->adapter, scpnt, fsf_req);
+		zfcp_scsi_dbf_event_result("retr", 4, req->adapter, scpnt, req);
 	else
-		zfcp_scsi_dbf_event_result("norm", 6, fsf_req->adapter, scpnt, fsf_req);
+		zfcp_scsi_dbf_event_result("norm", 6, req->adapter, scpnt, req);
 
-	/* cleanup pointer (need this especially for abort) */
 	scpnt->host_scribble = NULL;
-
-	/* always call back */
 	(scpnt->scsi_done) (scpnt);
-
 	/*
 	 * We must hold this lock until scsi_done has been called.
 	 * Otherwise we may call scsi_done after abort regarding this
 	 * command has completed.
 	 * Note: scsi_done must not block!
 	 */
- out:
-	read_unlock_irqrestore(&fsf_req->adapter->abort_lock, flags);
-	return retval;
+	read_unlock_irqrestore(&req->adapter->abort_lock, flags);
 }
 
-/*
- * function:    zfcp_fsf_send_fcp_command_task_management_handler
- *
- * purpose:	evaluates FCP_RSP IU
- *
- * returns:
- */
-static int
-zfcp_fsf_send_fcp_command_task_management_handler(struct zfcp_fsf_req *fsf_req)
+static void zfcp_fsf_send_fcp_ctm_handler(struct zfcp_fsf_req *req)
 {
-	int retval = 0;
 	struct fcp_rsp_iu *fcp_rsp_iu = (struct fcp_rsp_iu *)
-	    &(fsf_req->qtcb->bottom.io.fcp_rsp);
+	    &(req->qtcb->bottom.io.fcp_rsp);
 	char *fcp_rsp_info = (unsigned char *) &fcp_rsp_iu[1];
 
-	if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
-		fsf_req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
+	if ((fcp_rsp_info[3] != RSP_CODE_GOOD) ||
+	     (req->status & ZFCP_STATUS_FSFREQ_ERROR))
+		req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
+}
+
+
+static void zfcp_fsf_send_fcp_command_handler(struct zfcp_fsf_req *req)
+{
+	struct zfcp_unit *unit;
+	struct fsf_qtcb_header *header = &req->qtcb->header;
+
+	if (unlikely(req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT))
+		unit = req->data;
+	else
+		unit = req->unit;
+
+	if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR))
 		goto skip_fsfstatus;
-	}
 
-	/* check FCP_RSP_INFO */
-	switch (fcp_rsp_info[3]) {
-	case RSP_CODE_GOOD:
-		/* ok, continue */
+	switch (header->fsf_status) {
+	case FSF_HANDLE_MISMATCH:
+	case FSF_PORT_HANDLE_NOT_VALID:
+		zfcp_erp_adapter_reopen(unit->port->adapter, 0, 112, req);
+		req->status |= ZFCP_STATUS_FSFREQ_ERROR;
+		break;
+	case FSF_FCPLUN_NOT_VALID:
+	case FSF_LUN_HANDLE_NOT_VALID:
+		zfcp_erp_port_reopen(unit->port, 0, 113, req);
+		req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 		break;
-	case RSP_CODE_TASKMAN_UNSUPP:
-		fsf_req->status |= ZFCP_STATUS_FSFREQ_TMFUNCNOTSUPP;
+	case FSF_SERVICE_CLASS_NOT_SUPPORTED:
+		zfcp_fsf_class_not_supp(req);
 		break;
-	case RSP_CODE_TASKMAN_FAILED:
-		fsf_req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
+	case FSF_ACCESS_DENIED:
+		zfcp_fsf_access_denied_unit(req, unit);
+		break;
+	case FSF_DIRECTION_INDICATOR_NOT_VALID:
+		dev_err(&req->adapter->ccw_device->dev,
+			"Invalid data direction (%d) given for unit "
+			"0x%016Lx on port 0x%016Lx, shutting down "
+			"adapter.\n",
+			req->qtcb->bottom.io.data_direction,
+			unit->fcp_lun, unit->port->wwpn);
+		zfcp_erp_adapter_shutdown(unit->port->adapter, 0, 133, req);
+		req->status |= ZFCP_STATUS_FSFREQ_ERROR;
+		break;
+	case FSF_CMND_LENGTH_NOT_VALID:
+		dev_err(&req->adapter->ccw_device->dev,
+			"An invalid control-data-block length field (%d) "
+			"was found in a command for unit 0x%016Lx on port "
+			"0x%016Lx. Shutting down adapter.\n",
+			req->qtcb->bottom.io.fcp_cmnd_length,
+			unit->fcp_lun, unit->port->wwpn);
+		zfcp_erp_adapter_shutdown(unit->port->adapter, 0, 134, req);
+		req->status |= ZFCP_STATUS_FSFREQ_ERROR;
+		break;
+	case FSF_PORT_BOXED:
+		zfcp_erp_port_boxed(unit->port, 53, req);
+		req->status |= ZFCP_STATUS_FSFREQ_ERROR |
+			       ZFCP_STATUS_FSFREQ_RETRY;
+		break;
+	case FSF_LUN_BOXED:
+		zfcp_erp_unit_boxed(unit, 54, req);
+		req->status |= ZFCP_STATUS_FSFREQ_ERROR |
+			       ZFCP_STATUS_FSFREQ_RETRY;
+		break;
+	case FSF_ADAPTER_STATUS_AVAILABLE:
+		if (header->fsf_status_qual.word[0] ==
+		    FSF_SQ_INVOKE_LINK_TEST_PROCEDURE)
+			zfcp_test_link(unit->port);
+		req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 		break;
-	default:
-		/* invalid FCP response code */
-		fsf_req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
 	}
-
-      skip_fsfstatus:
-	return retval;
+skip_fsfstatus:
+	if (req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT)
+		zfcp_fsf_send_fcp_ctm_handler(req);
+	else {
+		zfcp_fsf_send_fcp_command_task_handler(req);
+		req->unit = NULL;
+		zfcp_unit_put(unit);
+	}
 }
 
-
-/*
- * function:    zfcp_fsf_control_file
- *
- * purpose:     Initiator of the control file upload/download FSF requests
- *
- * returns:     0           - FSF request is successfuly created and queued
- *              -EOPNOTSUPP - The FCP adapter does not have Control File support
- *              -EINVAL     - Invalid direction specified
- *              -ENOMEM     - Insufficient memory
- *              -EPERM      - Cannot create FSF request or place it in QDIO queue
+/**
+ * zfcp_fsf_send_fcp_command_task - initiate an FCP command (for a SCSI command)
+ * @adapter: adapter where scsi command is issued
+ * @unit: unit where command is sent to
+ * @scsi_cmnd: scsi command to be sent
+ * @timer: timer to be started when request is initiated
+ * @req_flags: flags for fsf_request
  */
-struct zfcp_fsf_req *zfcp_fsf_control_file(struct zfcp_adapter *adapter,
-					   struct zfcp_fsf_cfdc *fsf_cfdc)
+int zfcp_fsf_send_fcp_command_task(struct zfcp_adapter *adapter,
+				   struct zfcp_unit *unit,
+				   struct scsi_cmnd *scsi_cmnd,
+				   int use_timer, int req_flags)
 {
-	struct zfcp_fsf_req *fsf_req;
-	struct fsf_qtcb_bottom_support *bottom;
-	volatile struct qdio_buffer_element *sbale;
-	unsigned long lock_flags;
-	int direction;
-	int retval;
-	int bytes;
+	struct zfcp_fsf_req *req;
+	struct fcp_cmnd_iu *fcp_cmnd_iu;
+	unsigned int sbtype;
+	int real_bytes, retval = -EIO;
 
-	if (!(adapter->adapter_features & FSF_FEATURE_CFDC))
-		return ERR_PTR(-EOPNOTSUPP);
+	if (unlikely(!(atomic_read(&unit->status) &
+		       ZFCP_STATUS_COMMON_UNBLOCKED)))
+		return -EBUSY;
 
-	switch (fsf_cfdc->command) {
-	case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
-		direction = SBAL_FLAGS0_TYPE_WRITE;
+	spin_lock(&adapter->req_q.lock);
+	if (!atomic_read(&adapter->req_q.count))
+		goto out;
+	req = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND, req_flags,
+				  adapter->pool.fsf_req_scsi);
+	if (unlikely(IS_ERR(req))) {
+		retval = PTR_ERR(req);
+		goto out;
+	}
+
+	zfcp_unit_get(unit);
+	req->unit = unit;
+	req->data = scsi_cmnd;
+	req->handler = zfcp_fsf_send_fcp_command_handler;
+	req->qtcb->header.lun_handle = unit->handle;
+	req->qtcb->header.port_handle = unit->port->handle;
+	req->qtcb->bottom.io.service_class = FSF_CLASS_3;
+
+	scsi_cmnd->host_scribble = (unsigned char *) req->req_id;
+
+	fcp_cmnd_iu = (struct fcp_cmnd_iu *) &(req->qtcb->bottom.io.fcp_cmnd);
+	fcp_cmnd_iu->fcp_lun = unit->fcp_lun;
+	/*
+	 * set depending on data direction:
+	 *      data direction bits in SBALE (SB Type)
+	 *      data direction bits in QTCB
+	 *      data direction bits in FCP_CMND IU
+	 */
+	switch (scsi_cmnd->sc_data_direction) {
+	case DMA_NONE:
+		req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
+		sbtype = SBAL_FLAGS0_TYPE_READ;
 		break;
-	case FSF_QTCB_UPLOAD_CONTROL_FILE:
-		direction = SBAL_FLAGS0_TYPE_READ;
+	case DMA_FROM_DEVICE:
+		req->qtcb->bottom.io.data_direction = FSF_DATADIR_READ;
+		sbtype = SBAL_FLAGS0_TYPE_READ;
+		fcp_cmnd_iu->rddata = 1;
+		break;
+	case DMA_TO_DEVICE:
+		req->qtcb->bottom.io.data_direction = FSF_DATADIR_WRITE;
+		sbtype = SBAL_FLAGS0_TYPE_WRITE;
+		fcp_cmnd_iu->wddata = 1;
 		break;
+	case DMA_BIDIRECTIONAL:
 	default:
-		return ERR_PTR(-EINVAL);
+		retval = -EIO;
+		goto failed_scsi_cmnd;
 	}
 
-	retval = zfcp_fsf_req_create(adapter, fsf_cfdc->command,
-				     ZFCP_WAIT_FOR_SBAL,
-				     NULL, &lock_flags, &fsf_req);
-	if (retval < 0) {
-		retval = -EPERM;
-		goto unlock_queue_lock;
-	}
+	if (likely((scsi_cmnd->device->simple_tags) ||
+		   ((atomic_read(&unit->status) & ZFCP_STATUS_UNIT_READONLY) &&
+		    (atomic_read(&unit->status) & ZFCP_STATUS_UNIT_SHARED))))
+		fcp_cmnd_iu->task_attribute = SIMPLE_Q;
+	else
+		fcp_cmnd_iu->task_attribute = UNTAGGED;
 
-	sbale = zfcp_qdio_sbale_req(fsf_req);
-	sbale[0].flags |= direction;
+	if (unlikely(scsi_cmnd->cmd_len > FCP_CDB_LENGTH))
+		fcp_cmnd_iu->add_fcp_cdb_length =
+			(scsi_cmnd->cmd_len - FCP_CDB_LENGTH) >> 2;
 
-	bottom = &fsf_req->qtcb->bottom.support;
-	bottom->operation_subtype = FSF_CFDC_OPERATION_SUBTYPE;
-	bottom->option = fsf_cfdc->option;
+	memcpy(fcp_cmnd_iu->fcp_cdb, scsi_cmnd->cmnd, scsi_cmnd->cmd_len);
 
-	bytes = zfcp_qdio_sbals_from_sg(fsf_req, direction,
-					fsf_cfdc->sg,
-					ZFCP_MAX_SBALS_PER_REQ);
-	if (bytes != ZFCP_CFDC_MAX_SIZE) {
-		retval = -ENOMEM;
-		goto free_fsf_req;
-	}
+	req->qtcb->bottom.io.fcp_cmnd_length = sizeof(struct fcp_cmnd_iu) +
+		fcp_cmnd_iu->add_fcp_cdb_length + sizeof(fcp_dl_t);
 
-	zfcp_fsf_start_timer(fsf_req, ZFCP_FSF_REQUEST_TIMEOUT);
-	retval = zfcp_fsf_req_send(fsf_req);
-	if (retval < 0) {
-		retval = -EPERM;
-		goto free_fsf_req;
+	real_bytes = zfcp_qdio_sbals_from_sg(req, sbtype,
+					     scsi_sglist(scsi_cmnd),
+					     FSF_MAX_SBALS_PER_REQ);
+	if (unlikely(real_bytes < 0)) {
+		if (req->sbal_number < FSF_MAX_SBALS_PER_REQ)
+			retval = -EIO;
+		else {
+			dev_err(&adapter->ccw_device->dev,
+				"SCSI request too large. "
+				"Shutting down unit 0x%016Lx on port "
+				"0x%016Lx.\n", unit->fcp_lun,
+				unit->port->wwpn);
+			zfcp_erp_unit_shutdown(unit, 0, 131, req);
+			retval = -EINVAL;
+		}
+		goto failed_scsi_cmnd;
 	}
-	write_unlock_irqrestore(&adapter->req_q.lock, lock_flags);
-
-	wait_event(fsf_req->completion_wq,
-	           fsf_req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
 
-	return fsf_req;
+	zfcp_set_fcp_dl(fcp_cmnd_iu, real_bytes);
 
- free_fsf_req:
-	zfcp_fsf_req_free(fsf_req);
- unlock_queue_lock:
-	write_unlock_irqrestore(&adapter->req_q.lock, lock_flags);
-	return ERR_PTR(retval);
-}
+	if (use_timer)
+		zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
 
-static void zfcp_fsf_control_file_handler(struct zfcp_fsf_req *fsf_req)
-{
-	if (fsf_req->qtcb->header.fsf_status != FSF_GOOD)
-		fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
-}
+	retval = zfcp_fsf_req_send(req);
+	if (unlikely(retval))
+		goto failed_scsi_cmnd;
 
-static inline int
-zfcp_fsf_req_sbal_check(unsigned long *flags,
-			struct zfcp_qdio_queue *queue, int needed)
-{
-	write_lock_irqsave(&queue->lock, *flags);
-	if (likely(atomic_read(&queue->count) >= needed))
-		return 1;
-	write_unlock_irqrestore(&queue->lock, *flags);
-	return 0;
-}
+	goto out;
 
-/*
- * set qtcb pointer in fsf_req and initialize QTCB
- */
-static void
-zfcp_fsf_req_qtcb_init(struct zfcp_fsf_req *fsf_req)
-{
-	if (likely(fsf_req->qtcb != NULL)) {
-		fsf_req->qtcb->prefix.req_seq_no =
-			fsf_req->adapter->fsf_req_seq_no;
-		fsf_req->qtcb->prefix.req_id = fsf_req->req_id;
-		fsf_req->qtcb->prefix.ulp_info = ZFCP_ULP_INFO_VERSION;
-		fsf_req->qtcb->prefix.qtcb_type =
-			fsf_qtcb_type[fsf_req->fsf_command];
-		fsf_req->qtcb->prefix.qtcb_version = ZFCP_QTCB_VERSION;
-		fsf_req->qtcb->header.req_handle = fsf_req->req_id;
-		fsf_req->qtcb->header.fsf_command = fsf_req->fsf_command;
-	}
+failed_scsi_cmnd:
+	zfcp_unit_put(unit);
+	zfcp_fsf_req_free(req);
+	scsi_cmnd->host_scribble = NULL;
+out:
+	spin_unlock(&adapter->req_q.lock);
+	return retval;
 }
 
 /**
- * zfcp_fsf_req_sbal_get - try to get one SBAL in the request queue
- * @adapter: adapter for which request queue is examined
- * @req_flags: flags indicating whether to wait for needed SBAL or not
- * @lock_flags: lock_flags if queue_lock is taken
- * Return: 0 on success, otherwise -EIO, or -ERESTARTSYS
- * Locks: lock adapter->req_q->lock on success
- */
-static int
-zfcp_fsf_req_sbal_get(struct zfcp_adapter *adapter, int req_flags,
-		      unsigned long *lock_flags)
-{
-        long ret;
-	struct zfcp_qdio_queue *req_q = &adapter->req_q;
-
-        if (unlikely(req_flags & ZFCP_WAIT_FOR_SBAL)) {
-                ret = wait_event_interruptible_timeout(adapter->request_wq,
-			zfcp_fsf_req_sbal_check(lock_flags, req_q, 1),
-						       ZFCP_SBAL_TIMEOUT);
-		if (ret < 0)
-			return ret;
-		if (!ret)
-			return -EIO;
-	} else if (!zfcp_fsf_req_sbal_check(lock_flags, req_q, 1))
-                return -EIO;
-
-        return 0;
-}
-
-/*
- * function:    zfcp_fsf_req_create
- *
- * purpose:	create an FSF request at the specified adapter and
- *		setup common fields
- *
- * returns:	-ENOMEM if there was insufficient memory for a request
- *              -EIO if no qdio buffers could be allocate to the request
- *              -EINVAL/-EPERM on bug conditions in req_dequeue
- *              0 in success
- *
- * note:        The created request is returned by reference.
- *
- * locks:	lock of concerned request queue must not be held,
- *		but is held on completion (write, irqsave)
- */
-int
-zfcp_fsf_req_create(struct zfcp_adapter *adapter, u32 fsf_cmd, int req_flags,
-		    mempool_t *pool, unsigned long *lock_flags,
-		    struct zfcp_fsf_req **fsf_req_p)
+ * zfcp_fsf_send_fcp_ctm - send SCSI task management command
+ * @adapter: pointer to struct zfcp-adapter
+ * @unit: pointer to struct zfcp_unit
+ * @tm_flags: unsigned byte for task management flags
+ * @req_flags: int request flags
+ * Returns: on success pointer to struct fsf_req, NULL otherwise
+ */
+struct zfcp_fsf_req *zfcp_fsf_send_fcp_ctm(struct zfcp_adapter *adapter,
+					   struct zfcp_unit *unit,
+					   u8 tm_flags, int req_flags)
 {
 	volatile struct qdio_buffer_element *sbale;
-	struct zfcp_fsf_req *fsf_req = NULL;
-	int ret = 0;
-	struct zfcp_qdio_queue *req_q = &adapter->req_q;
-
-	/* allocate new FSF request */
-	fsf_req = zfcp_fsf_req_alloc(pool, req_flags);
-	if (unlikely(!fsf_req)) {
-		ret = -ENOMEM;
-		goto failed_fsf_req;
-	}
-
-	fsf_req->adapter = adapter;
-	fsf_req->fsf_command = fsf_cmd;
-	INIT_LIST_HEAD(&fsf_req->list);
-	init_timer(&fsf_req->timer);
-
-	/* initialize waitqueue which may be used to wait on
-	   this request completion */
-	init_waitqueue_head(&fsf_req->completion_wq);
-
-        ret = zfcp_fsf_req_sbal_get(adapter, req_flags, lock_flags);
-        if (ret < 0)
-                goto failed_sbals;
-
-	/* this is serialized (we are holding req_queue-lock of adapter) */
-	if (adapter->req_no == 0)
-		adapter->req_no++;
-	fsf_req->req_id = adapter->req_no++;
-
-	zfcp_fsf_req_qtcb_init(fsf_req);
+	struct zfcp_fsf_req *req = NULL;
+	struct fcp_cmnd_iu *fcp_cmnd_iu;
 
-	/*
-	 * We hold queue_lock here. Check if QDIOUP is set and let request fail
-	 * if it is not set (see also *_open_qdio and *_close_qdio).
-	 */
+	if (unlikely(!(atomic_read(&unit->status) &
+		       ZFCP_STATUS_COMMON_UNBLOCKED)))
+		return NULL;
 
-	if (!atomic_test_mask(ZFCP_STATUS_ADAPTER_QDIOUP, &adapter->status)) {
-		write_unlock_irqrestore(&req_q->lock, *lock_flags);
-		ret = -EIO;
-		goto failed_sbals;
-	}
+	spin_lock(&adapter->req_q.lock);
+	if (!atomic_read(&adapter->req_q.count))
+		goto out;
+	req = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND, req_flags,
+				  adapter->pool.fsf_req_scsi);
+	if (unlikely(IS_ERR(req)))
+		goto out;
 
-	if (fsf_req->qtcb) {
-		fsf_req->seq_no = adapter->fsf_req_seq_no;
-		fsf_req->qtcb->prefix.req_seq_no = adapter->fsf_req_seq_no;
-	}
-	fsf_req->sbal_number = 1;
-	fsf_req->sbal_first = req_q->first;
-	fsf_req->sbal_last = req_q->first;
-        fsf_req->sbale_curr = 1;
+	req->status |= ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT;
+	req->data = unit;
+	req->handler = zfcp_fsf_send_fcp_command_handler;
+	req->qtcb->header.lun_handle = unit->handle;
+	req->qtcb->header.port_handle = unit->port->handle;
+	req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
+	req->qtcb->bottom.io.service_class = FSF_CLASS_3;
+	req->qtcb->bottom.io.fcp_cmnd_length = 	sizeof(struct fcp_cmnd_iu) +
+						sizeof(fcp_dl_t);
 
-	if (likely(req_flags & ZFCP_REQ_AUTO_CLEANUP)) {
-		fsf_req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
-	}
+	sbale = zfcp_qdio_sbale_req(req);
+	sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE;
+	sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
 
-	sbale = zfcp_qdio_sbale_req(fsf_req);
+	fcp_cmnd_iu = (struct fcp_cmnd_iu *) &req->qtcb->bottom.io.fcp_cmnd;
+	fcp_cmnd_iu->fcp_lun = unit->fcp_lun;
+	fcp_cmnd_iu->task_management_flags = tm_flags;
 
-	/* setup common SBALE fields */
-	sbale[0].addr = (void *) fsf_req->req_id;
-	sbale[0].flags |= SBAL_FLAGS0_COMMAND;
-	if (likely(fsf_req->qtcb != NULL)) {
-		sbale[1].addr = (void *) fsf_req->qtcb;
-		sbale[1].length = sizeof(struct fsf_qtcb);
-	}
+	zfcp_fsf_start_timer(req, ZFCP_SCSI_ER_TIMEOUT);
+	if (!zfcp_fsf_req_send(req))
+		goto out;
 
-	goto success;
+	zfcp_fsf_req_free(req);
+	req = NULL;
+out:
+	spin_unlock(&adapter->req_q.lock);
+	return req;
+}
 
- failed_sbals:
-/* dequeue new FSF request previously enqueued */
-	zfcp_fsf_req_free(fsf_req);
-	fsf_req = NULL;
-
- failed_fsf_req:
-	write_lock_irqsave(&req_q->lock, *lock_flags);
- success:
-	*fsf_req_p = fsf_req;
-	return ret;
+static void zfcp_fsf_control_file_handler(struct zfcp_fsf_req *req)
+{
+	if (req->qtcb->header.fsf_status != FSF_GOOD)
+		req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 }
 
-/*
- * function:    zfcp_fsf_req_send
- *
- * purpose:	start transfer of FSF request via QDIO
- *
- * returns:	0 - request transfer succesfully started
- *		!0 - start of request transfer failed
+/**
+ * zfcp_fsf_control_file - control file upload/download
+ * @adapter: pointer to struct zfcp_adapter
+ * @fsf_cfdc: pointer to struct zfcp_fsf_cfdc
+ * Returns: on success pointer to struct zfcp_fsf_req, NULL otherwise
  */
-static int zfcp_fsf_req_send(struct zfcp_fsf_req *fsf_req)
+struct zfcp_fsf_req *zfcp_fsf_control_file(struct zfcp_adapter *adapter,
+					   struct zfcp_fsf_cfdc *fsf_cfdc)
 {
-	struct zfcp_adapter *adapter;
-	struct zfcp_qdio_queue *req_q;
 	volatile struct qdio_buffer_element *sbale;
-	int inc_seq_no;
-	int retval = 0;
+	struct zfcp_fsf_req *req = NULL;
+	struct fsf_qtcb_bottom_support *bottom;
+	int direction, retval = -EIO, bytes;
+
+	if (!(adapter->adapter_features & FSF_FEATURE_CFDC))
+		return ERR_PTR(-EOPNOTSUPP);
 
-	adapter = fsf_req->adapter;
-	req_q = &adapter->req_q;
+	switch (fsf_cfdc->command) {
+	case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
+		direction = SBAL_FLAGS0_TYPE_WRITE;
+		break;
+	case FSF_QTCB_UPLOAD_CONTROL_FILE:
+		direction = SBAL_FLAGS0_TYPE_READ;
+		break;
+	default:
+		return ERR_PTR(-EINVAL);
+	}
 
-	sbale = zfcp_qdio_sbale_req(fsf_req);
+	spin_lock(&adapter->req_q.lock);
+	if (zfcp_fsf_req_sbal_get(adapter))
+		goto out;
 
-	/* put allocated FSF request into hash table */
-	spin_lock(&adapter->req_list_lock);
-	zfcp_reqlist_add(adapter, fsf_req);
-	spin_unlock(&adapter->req_list_lock);
+	req = zfcp_fsf_req_create(adapter, fsf_cfdc->command, 0, NULL);
+	if (unlikely(IS_ERR(req))) {
+		retval = -EPERM;
+		goto out;
+	}
 
-	inc_seq_no = (fsf_req->qtcb != NULL);
+	req->handler = zfcp_fsf_control_file_handler;
 
-	fsf_req->issued = get_clock();
+	sbale = zfcp_qdio_sbale_req(req);
+	sbale[0].flags |= direction;
 
-	retval = zfcp_qdio_send(fsf_req);
+	bottom = &req->qtcb->bottom.support;
+	bottom->operation_subtype = FSF_CFDC_OPERATION_SUBTYPE;
+	bottom->option = fsf_cfdc->option;
 
-	if (unlikely(retval)) {
-		/* Queues are down..... */
-		del_timer(&fsf_req->timer);
-		spin_lock(&adapter->req_list_lock);
-		zfcp_reqlist_remove(adapter, fsf_req);
-		spin_unlock(&adapter->req_list_lock);
-		/* undo changes in request queue made for this request */
-		atomic_add(fsf_req->sbal_number, &req_q->count);
-		req_q->first -= fsf_req->sbal_number;
-		req_q->first += QDIO_MAX_BUFFERS_PER_Q;
-		req_q->first %= QDIO_MAX_BUFFERS_PER_Q;
-		zfcp_erp_adapter_reopen(adapter, 0, 116, fsf_req);
-		retval = -EIO;
-	} else {
-		/*
-		 * increase FSF sequence counter -
-		 * this must only be done for request successfully enqueued to
-		 * QDIO this rejected requests may be cleaned up by calling
-		 * routines  resulting in missing sequence counter values
-		 * otherwise,
-		 */
+	bytes = zfcp_qdio_sbals_from_sg(req, direction, fsf_cfdc->sg,
+					FSF_MAX_SBALS_PER_REQ);
+	if (bytes != ZFCP_CFDC_MAX_SIZE) {
+		retval = -ENOMEM;
+		zfcp_fsf_req_free(req);
+		goto out;
+	}
 
-		/* Don't increase for unsolicited status */
-		if (inc_seq_no)
-			adapter->fsf_req_seq_no++;
+	zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
+	retval = zfcp_fsf_req_send(req);
+out:
+	spin_unlock(&adapter->req_q.lock);
+
+	if (!retval) {
+		wait_event(req->completion_wq,
+			   req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
+		return req;
 	}
-	return retval;
+	return ERR_PTR(retval);
 }
--- a/drivers/s390/scsi/zfcp_def.h	2008-06-30 11:27:59.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_def.h	2008-06-30 11:28:20.000000000 +0200
@@ -76,11 +76,6 @@ zfcp_address_to_sg(void *address, struct
 #define ZFCP_DEVICE_MODEL       0x03
 #define ZFCP_DEVICE_MODEL_PRIV	0x04
 
-/* allow as many chained SBALs as are supported by hardware */
-#define ZFCP_MAX_SBALS_PER_REQ		FSF_MAX_SBALS_PER_REQ
-#define ZFCP_MAX_SBALS_PER_CT_REQ	FSF_MAX_SBALS_PER_REQ
-#define ZFCP_MAX_SBALS_PER_ELS_REQ	FSF_MAX_SBALS_PER_ELS_REQ
-
 /* DMQ bug workaround: don't use last SBALE */
 #define ZFCP_MAX_SBALES_PER_SBAL	(QDIO_MAX_ELEMENTS_PER_BUFFER - 1)
 
@@ -89,21 +84,17 @@ zfcp_address_to_sg(void *address, struct
 
 /* max. number of (data buffer) SBALEs in largest SBAL chain */
 #define ZFCP_MAX_SBALES_PER_REQ		\
-	(ZFCP_MAX_SBALS_PER_REQ * ZFCP_MAX_SBALES_PER_SBAL - 2)
+	(FSF_MAX_SBALS_PER_REQ * ZFCP_MAX_SBALES_PER_SBAL - 2)
         /* request ID + QTCB in SBALE 0 + 1 of first SBAL in chain */
 
 #define ZFCP_MAX_SECTORS (ZFCP_MAX_SBALES_PER_REQ * 8)
         /* max. number of (data buffer) SBALEs in largest SBAL chain
            multiplied with number of sectors per 4k block */
 
-#define ZFCP_SBAL_TIMEOUT               (5*HZ)
-
 #define ZFCP_TYPE2_RECOVERY_TIME        8	/* seconds */
 
 /********************* FSF SPECIFIC DEFINES *********************************/
 
-#define ZFCP_ULP_INFO_VERSION                   26
-#define ZFCP_QTCB_VERSION	FSF_QTCB_CURRENT_VERSION
 /* ATTENTION: value must not be used by hardware */
 #define FSF_QTCB_UNSOLICITED_STATUS		0x6305
 
@@ -121,8 +112,6 @@ typedef unsigned long long fcp_lun_t;
 /* data length field may be at variable position in FCP-2 FCP_CMND IU */
 typedef unsigned int       fcp_dl_t;
 
-#define ZFCP_FC_SERVICE_CLASS_DEFAULT	FSF_CLASS_3
-
 /* timeout for name-server lookup (in seconds) */
 #define ZFCP_NS_GID_PN_TIMEOUT		10
 
@@ -228,7 +217,6 @@ struct fcp_logo {
  * FC-FS stuff
  */
 #define R_A_TOV				10 /* seconds */
-#define ZFCP_ELS_TIMEOUT		(2 * R_A_TOV)
 
 #define ZFCP_LS_RLS			0x0f
 #define ZFCP_LS_ADISC			0x52
@@ -521,7 +509,7 @@ struct zfcp_qdio_queue {
 						 in queue (free_count>0) */
 	atomic_t           count;	      /* number of free buffers
 						 in queue */
-	rwlock_t	   lock;	      /* lock for operations on queue */
+	spinlock_t	   lock;	      /* lock for operations on queue */
 	int                pci_batch;	      /* SBALs since PCI indication
 						 was last set */
 };
@@ -686,7 +674,7 @@ struct zfcp_fsf_req {
 	u32		       fsf_command;    /* FSF Command copy */
 	struct fsf_qtcb	       *qtcb;	       /* address of associated QTCB */
 	u32		       seq_no;         /* Sequence number of request */
-	unsigned long	       data;           /* private data of request */
+	void			*data;           /* private data of request */
 	struct timer_list     timer;	       /* used for erp or scsi er */
 	struct zfcp_erp_action *erp_action;    /* used if this request is
 						  issued on behalf of erp */
@@ -694,10 +682,9 @@ struct zfcp_fsf_req {
 						  from emergency pool */
 	unsigned long long     issued;         /* request sent time (STCK) */
 	struct zfcp_unit       *unit;
+	void			(*handler)(struct zfcp_fsf_req *);
 };
 
-typedef void zfcp_fsf_req_handler_t(struct zfcp_fsf_req*);
-
 /* driver data */
 struct zfcp_data {
 	struct scsi_host_template scsi_host_template;
@@ -730,7 +717,6 @@ struct zfcp_fsf_req_qtcb {
 /********************** ZFCP SPECIFIC DEFINES ********************************/
 
 #define ZFCP_REQ_AUTO_CLEANUP	0x00000002
-#define ZFCP_WAIT_FOR_SBAL	0x00000004
 #define ZFCP_REQ_NO_QTCB	0x00000008
 
 #define ZFCP_SET                0x00000100
@@ -753,15 +739,6 @@ static inline int zfcp_reqlist_hash(unsi
 	return req_id % REQUEST_LIST_SIZE;
 }
 
-static inline void zfcp_reqlist_add(struct zfcp_adapter *adapter,
-				    struct zfcp_fsf_req *fsf_req)
-{
-	unsigned int idx;
-
-	idx = zfcp_reqlist_hash(fsf_req->req_id);
-	list_add_tail(&fsf_req->list, &adapter->req_list[idx]);
-}
-
 static inline void zfcp_reqlist_remove(struct zfcp_adapter *adapter,
 				       struct zfcp_fsf_req *fsf_req)
 {
--- a/drivers/s390/scsi/zfcp_ext.h	2008-06-30 11:27:59.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_ext.h	2008-06-30 11:28:20.000000000 +0200
@@ -70,21 +70,19 @@ extern struct zfcp_fsf_req *zfcp_fsf_con
 extern void zfcp_fsf_start_timer(struct zfcp_fsf_req *, unsigned long);
 extern void zfcp_erp_start_timer(struct zfcp_fsf_req *);
 extern void zfcp_fsf_req_dismiss_all(struct zfcp_adapter *);
-extern int  zfcp_fsf_status_read(struct zfcp_adapter *, int);
+extern int  zfcp_fsf_status_read(struct zfcp_adapter *);
 extern int zfcp_status_read_refill(struct zfcp_adapter *adapter);
-extern int zfcp_fsf_req_create(struct zfcp_adapter *, u32, int, mempool_t *,
-			       unsigned long *, struct zfcp_fsf_req **)
-	__acquires(adapter->req_q.lock);
 extern int zfcp_fsf_send_ct(struct zfcp_send_ct *, mempool_t *,
 			    struct zfcp_erp_action *);
 extern int zfcp_fsf_send_els(struct zfcp_send_els *);
 extern int  zfcp_fsf_send_fcp_command_task(struct zfcp_adapter *,
 					   struct zfcp_unit *,
 					   struct scsi_cmnd *, int, int);
-extern int  zfcp_fsf_req_complete(struct zfcp_fsf_req *);
+extern void zfcp_fsf_req_complete(struct zfcp_fsf_req *);
 extern void zfcp_fsf_req_free(struct zfcp_fsf_req *);
-extern struct zfcp_fsf_req *zfcp_fsf_send_fcp_command_task_management(
-	struct zfcp_adapter *, struct zfcp_unit *, u8, int);
+extern struct zfcp_fsf_req *zfcp_fsf_send_fcp_ctm(struct zfcp_adapter *,
+						     struct zfcp_unit *, u8,
+						     int);
 extern struct zfcp_fsf_req *zfcp_fsf_abort_fcp_command(
 	unsigned long, struct zfcp_adapter *, struct zfcp_unit *, int);
 
--- a/drivers/s390/scsi/zfcp_dbf.c	2008-06-30 11:27:23.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_dbf.c	2008-06-30 11:28:20.000000000 +0200
@@ -961,7 +961,7 @@ void zfcp_san_dbf_event_incoming_els(str
 
 	zfcp_san_dbf_event_els("iels", 1, fsf_req, buf->d_id,
 			       fc_host_port_id(adapter->scsi_host),
-			       *(u8 *)buf->payload, (void *)buf->payload,
+			       buf->payload.data[0], (void *)buf->payload.data,
 			       length);
 }
 
--- a/drivers/s390/scsi/zfcp_fc.c	2008-06-30 11:27:42.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_fc.c	2008-06-30 11:28:20.000000000 +0200
@@ -83,8 +83,8 @@ static void zfcp_fc_incoming_rscn(struct
 	u16 no_entries;
 	u32 range_mask;
 
-	fcp_rscn_head = (struct fcp_rscn_head *) status_buffer->payload;
-	fcp_rscn_element = (struct fcp_rscn_element *) status_buffer->payload;
+	fcp_rscn_head = (struct fcp_rscn_head *) status_buffer->payload.data;
+	fcp_rscn_element = (struct fcp_rscn_element *) fcp_rscn_head;
 
 	/* see FC-FS */
 	no_entries = fcp_rscn_head->payload_len /
@@ -135,7 +135,7 @@ static void zfcp_fc_incoming_plogi(struc
 	struct fsf_status_read_buffer *status_buffer =
 		(struct fsf_status_read_buffer *)req->data;
 	struct fsf_plogi *els_plogi =
-		(struct fsf_plogi *) status_buffer->payload;
+		(struct fsf_plogi *) status_buffer->payload.data;
 
 	zfcp_fc_incoming_wwpn(req, els_plogi->serv_param.wwpn);
 }
@@ -144,7 +144,8 @@ static void zfcp_fc_incoming_logo(struct
 {
 	struct fsf_status_read_buffer *status_buffer =
 		(struct fsf_status_read_buffer *)req->data;
-	struct fcp_logo *els_logo = (struct fcp_logo *) status_buffer->payload;
+	struct fcp_logo *els_logo =
+		(struct fcp_logo *) status_buffer->payload.data;
 
 	zfcp_fc_incoming_wwpn(req, els_logo->nport_wwpn);
 }
@@ -157,7 +158,7 @@ void zfcp_fc_incoming_els(struct zfcp_fs
 {
 	struct fsf_status_read_buffer *status_buffer =
 		(struct fsf_status_read_buffer *) fsf_req->data;
-	unsigned int els_type = status_buffer->payload[0];
+	unsigned int els_type = status_buffer->payload.data[0];
 
 	zfcp_san_dbf_event_incoming_els(fsf_req);
 	if (els_type == LS_PLOGI)
--- a/drivers/s390/scsi/zfcp_fsf.h	2008-06-30 11:24:30.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_fsf.h	2008-06-30 11:28:20.000000000 +0200
@@ -287,6 +287,18 @@ struct fsf_bit_error_payload {
 	u32 current_transmit_b2b_credit;
 } __attribute__ ((packed));
 
+struct fsf_link_down_info {
+	u32 error_code;
+	u32 res1;
+	u8 res2[2];
+	u8 primary_status;
+	u8 ioerr_code;
+	u8 action_code;
+	u8 reason_code;
+	u8 explanation_code;
+	u8 vendor_specific_code;
+} __attribute__ ((packed));
+
 struct fsf_status_read_buffer {
 	u32 status_type;
 	u32 status_subtype;
@@ -297,7 +309,12 @@ struct fsf_status_read_buffer {
 	u32 class;
 	u64 fcp_lun;
 	u8  res3[24];
-	u8  payload[FSF_STATUS_READ_PAYLOAD_SIZE];
+	union {
+		u8  data[FSF_STATUS_READ_PAYLOAD_SIZE];
+		u32 word[FSF_STATUS_READ_PAYLOAD_SIZE/sizeof(u32)];
+		struct fsf_link_down_info link_down_info;
+		struct fsf_bit_error_payload bit_error;
+	} payload;
 } __attribute__ ((packed));
 
 struct fsf_qual_version_error {
@@ -310,18 +327,6 @@ struct fsf_qual_sequence_error {
 	u32 res1[3];
 } __attribute__ ((packed));
 
-struct fsf_link_down_info {
-	u32 error_code;
-	u32 res1;
-	u8 res2[2];
-	u8 primary_status;
-	u8 ioerr_code;
-	u8 action_code;
-	u8 reason_code;
-	u8 explanation_code;
-	u8 vendor_specific_code;
-} __attribute__ ((packed));
-
 struct fsf_qual_latency_info {
 	u32 channel_lat;
 	u32 fabric_lat;
--- a/drivers/s390/scsi/zfcp_scsi.c	2008-06-30 11:27:59.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_scsi.c	2008-06-30 11:28:20.000000000 +0200
@@ -182,7 +182,7 @@ static int zfcp_scsi_eh_abort_handler(st
 		zfcp_scsi_dbf_event_abort("lte1", adapter, scpnt, NULL, 0);
 		return retval;
 	}
-	fsf_req->data = 0;
+	fsf_req->data = NULL;
 	fsf_req->status |= ZFCP_STATUS_FSFREQ_ABORTING;
 
 	/* don't access old fsf_req after releasing the abort_lock */
@@ -220,8 +220,7 @@ static int zfcp_task_mgmt_function(struc
 	int retval = SUCCESS;
 
 	/* issue task management function */
-	fsf_req = zfcp_fsf_send_fcp_command_task_management
-		(adapter, unit, tm_flags, 0);
+	fsf_req = zfcp_fsf_send_fcp_ctm(adapter, unit, tm_flags, 0);
 	if (!fsf_req) {
 		zfcp_scsi_dbf_event_devreset("nres", tm_flags, unit, scpnt);
 		return FAILED;
--- a/drivers/s390/scsi/zfcp_qdio.c	2008-06-30 11:25:37.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_qdio.c	2008-06-30 11:28:20.000000000 +0200
@@ -10,7 +10,7 @@
 
 /* FIXME(tune): free space should be one max. SBAL chain plus what? */
 #define ZFCP_QDIO_PCI_INTERVAL	(QDIO_MAX_BUFFERS_PER_Q \
-				- (ZFCP_MAX_SBALS_PER_REQ + 4))
+				- (FSF_MAX_SBALS_PER_REQ + 4))
 #define QBUFF_PER_PAGE		(PAGE_SIZE / sizeof(struct qdio_buffer))
 
 static int zfcp_qdio_buffers_enqueue(struct qdio_buffer **sbal)
@@ -432,9 +432,9 @@ void zfcp_qdio_close(struct zfcp_adapter
 
 	/* clear QDIOUP flag, thus do_QDIO is not called during qdio_shutdown */
 	req_q = &adapter->req_q;
-	write_lock_irq(&req_q->lock);
+	spin_lock(&req_q->lock);
 	atomic_clear_mask(ZFCP_STATUS_ADAPTER_QDIOUP, &adapter->status);
-	write_unlock_irq(&req_q->lock);
+	spin_unlock(&req_q->lock);
 
 	while (qdio_shutdown(adapter->ccw_device, QDIO_FLAG_CLEANUP_USING_CLEAR)
 			== -EINPROGRESS)
--- a/drivers/s390/scsi/zfcp_aux.c	2008-06-30 11:27:59.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_aux.c	2008-06-30 11:28:20.000000000 +0200
@@ -424,7 +424,7 @@ static void zfcp_dummy_release(struct de
 int zfcp_status_read_refill(struct zfcp_adapter *adapter)
 {
 	while (atomic_read(&adapter->stat_miss) > 0)
-		if (zfcp_fsf_status_read(adapter, ZFCP_WAIT_FOR_SBAL)) {
+		if (zfcp_fsf_status_read(adapter)) {
 			if (atomic_read(&adapter->stat_miss) >= 16) {
 				zfcp_erp_adapter_reopen(adapter, 0, 103, NULL);
 				return 1;
@@ -509,10 +509,10 @@ int zfcp_adapter_enqueue(struct ccw_devi
 	spin_lock_init(&adapter->san_dbf_lock);
 	spin_lock_init(&adapter->scsi_dbf_lock);
 	spin_lock_init(&adapter->rec_dbf_lock);
+	spin_lock_init(&adapter->req_q.lock);
 
 	rwlock_init(&adapter->erp_lock);
 	rwlock_init(&adapter->abort_lock);
-	rwlock_init(&adapter->req_q.lock);
 
 	sema_init(&adapter->erp_ready_sem, 0);
 

-- 

[patch 10/11] zfcp: Cleanup code in zfcp_erp.c

[christof.schmitt]

[-- Attachment #1: erp-cleanup.diff --]
[-- Type: text/plain, Size: 133449 bytes --]

From: Christof Schmitt <christof.schmitt@de.ibm.com>

Cleanup the code in zfcp_erp.c, move erp internal definititions to
this file and move FSF timeout handling to the FSF layer.

Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com>
Signed-off-by: Swen Schillig <swen@vnet.ibm.com>
---
 drivers/s390/scsi/zfcp_def.h |   45 
 drivers/s390/scsi/zfcp_erp.c | 3528 ++++++++++++++++---------------------------
 drivers/s390/scsi/zfcp_ext.h |   25 
 drivers/s390/scsi/zfcp_fsf.c |   43 
 4 files changed, 1359 insertions(+), 2282 deletions(-)

--- a/drivers/s390/scsi/zfcp_erp.c	2008-06-30 11:27:42.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_erp.c	2008-06-30 11:28:44.000000000 +0200
@@ -8,373 +8,399 @@
 
 #include "zfcp_ext.h"
 
-static int zfcp_erp_adapter_reopen_internal(struct zfcp_adapter *, int, u8,
-					    void *);
-static int zfcp_erp_port_forced_reopen_internal(struct zfcp_port *, int, u8,
-						void *);
-static int zfcp_erp_port_reopen_internal(struct zfcp_port *, int, u8, void *);
-static int zfcp_erp_unit_reopen_internal(struct zfcp_unit *, int, u8, void *);
-
-static int zfcp_erp_port_reopen_all_internal(struct zfcp_adapter *, int, u8,
-					     void *);
-static int zfcp_erp_unit_reopen_all_internal(struct zfcp_port *, int, u8,
-					     void *);
-
-static void zfcp_erp_adapter_block(struct zfcp_adapter *, int);
-static void zfcp_erp_adapter_unblock(struct zfcp_adapter *);
-static void zfcp_erp_port_block(struct zfcp_port *, int);
-static void zfcp_erp_port_unblock(struct zfcp_port *);
-static void zfcp_erp_unit_block(struct zfcp_unit *, int);
-static void zfcp_erp_unit_unblock(struct zfcp_unit *);
-
-static int zfcp_erp_thread(void *);
-
-static int zfcp_erp_strategy(struct zfcp_erp_action *);
-
-static int zfcp_erp_strategy_do_action(struct zfcp_erp_action *);
-static int zfcp_erp_strategy_memwait(struct zfcp_erp_action *);
-static int zfcp_erp_strategy_check_target(struct zfcp_erp_action *, int);
-static int zfcp_erp_strategy_check_unit(struct zfcp_unit *, int);
-static int zfcp_erp_strategy_check_port(struct zfcp_port *, int);
-static int zfcp_erp_strategy_check_adapter(struct zfcp_adapter *, int);
-static int zfcp_erp_strategy_statechange(int, u32, struct zfcp_adapter *,
-					 struct zfcp_port *,
-					 struct zfcp_unit *, int);
-static int zfcp_erp_strategy_statechange_detected(atomic_t *, u32);
-static int zfcp_erp_strategy_followup_actions(int, struct zfcp_adapter *,
-					      struct zfcp_port *,
-					      struct zfcp_unit *, int);
-static int zfcp_erp_strategy_check_queues(struct zfcp_adapter *);
-static int zfcp_erp_strategy_check_action(struct zfcp_erp_action *, int);
-
-static int zfcp_erp_adapter_strategy(struct zfcp_erp_action *);
-static int zfcp_erp_adapter_strategy_generic(struct zfcp_erp_action *, int);
-static int zfcp_erp_adapter_strategy_close(struct zfcp_erp_action *);
-static int zfcp_erp_adapter_strategy_open(struct zfcp_erp_action *);
-static int zfcp_erp_adapter_strategy_open_qdio(struct zfcp_erp_action *);
-static int zfcp_erp_adapter_strategy_open_fsf(struct zfcp_erp_action *);
-static int zfcp_erp_adapter_strategy_open_fsf_xconfig(struct zfcp_erp_action *);
-static int zfcp_erp_adapter_strategy_open_fsf_xport(struct zfcp_erp_action *);
-static int zfcp_erp_adapter_strategy_open_fsf_statusread(
-	struct zfcp_erp_action *);
-
-static int zfcp_erp_port_forced_strategy(struct zfcp_erp_action *);
-static int zfcp_erp_port_forced_strategy_close(struct zfcp_erp_action *);
-
-static int zfcp_erp_port_strategy(struct zfcp_erp_action *);
-static int zfcp_erp_port_strategy_clearstati(struct zfcp_port *);
-static int zfcp_erp_port_strategy_close(struct zfcp_erp_action *);
-static int zfcp_erp_port_strategy_open(struct zfcp_erp_action *);
-static int zfcp_erp_port_strategy_open_nameserver(struct zfcp_erp_action *);
-static int zfcp_erp_port_strategy_open_nameserver_wakeup(
-	struct zfcp_erp_action *);
-static int zfcp_erp_port_strategy_open_common(struct zfcp_erp_action *);
-static int zfcp_erp_port_strategy_open_common_lookup(struct zfcp_erp_action *);
-static int zfcp_erp_port_strategy_open_port(struct zfcp_erp_action *);
-
-static int zfcp_erp_unit_strategy(struct zfcp_erp_action *);
-static int zfcp_erp_unit_strategy_clearstati(struct zfcp_unit *);
-static int zfcp_erp_unit_strategy_close(struct zfcp_erp_action *);
-static int zfcp_erp_unit_strategy_open(struct zfcp_erp_action *);
-
-static void zfcp_erp_action_dismiss_adapter(struct zfcp_adapter *);
-static void zfcp_erp_action_dismiss_port(struct zfcp_port *);
-static void zfcp_erp_action_dismiss_unit(struct zfcp_unit *);
-static void zfcp_erp_action_dismiss(struct zfcp_erp_action *);
-
-static int zfcp_erp_action_enqueue(int, struct zfcp_adapter *,
-				   struct zfcp_port *, struct zfcp_unit *,
-				   u8 id, void *ref);
-static int zfcp_erp_action_dequeue(struct zfcp_erp_action *);
-static void zfcp_erp_action_cleanup(int, struct zfcp_adapter *,
-				    struct zfcp_port *, struct zfcp_unit *,
-				    int);
-
-static void zfcp_erp_action_ready(struct zfcp_erp_action *);
-static int  zfcp_erp_action_exists(struct zfcp_erp_action *);
+#define ZFCP_MAX_ERPS                   3
 
-static void zfcp_erp_action_to_ready(struct zfcp_erp_action *);
-static void zfcp_erp_action_to_running(struct zfcp_erp_action *);
+enum zfcp_erp_act_flags {
+	ZFCP_STATUS_ERP_TIMEDOUT	= 0x10000000,
+	ZFCP_STATUS_ERP_CLOSE_ONLY	= 0x01000000,
+	ZFCP_STATUS_ERP_DISMISSING	= 0x00100000,
+	ZFCP_STATUS_ERP_DISMISSED	= 0x00200000,
+	ZFCP_STATUS_ERP_LOWMEM		= 0x00400000,
+};
 
-static void zfcp_erp_memwait_handler(unsigned long);
+enum zfcp_erp_steps {
+	ZFCP_ERP_STEP_UNINITIALIZED	= 0x0000,
+	ZFCP_ERP_STEP_FSF_XCONFIG	= 0x0001,
+	ZFCP_ERP_STEP_PHYS_PORT_CLOSING	= 0x0010,
+	ZFCP_ERP_STEP_PORT_CLOSING	= 0x0100,
+	ZFCP_ERP_STEP_NAMESERVER_OPEN	= 0x0200,
+	ZFCP_ERP_STEP_NAMESERVER_LOOKUP	= 0x0400,
+	ZFCP_ERP_STEP_PORT_OPENING	= 0x0800,
+	ZFCP_ERP_STEP_UNIT_CLOSING	= 0x1000,
+	ZFCP_ERP_STEP_UNIT_OPENING	= 0x2000,
+};
 
-/**
- * zfcp_close_fsf - stop FSF operations for an adapter
- *
- * Dismiss and cleanup all pending fsf_reqs (this wakes up all initiators of
- * requests waiting for completion; especially this returns SCSI commands
- * with error state).
- */
-static void zfcp_close_fsf(struct zfcp_adapter *adapter)
+enum zfcp_erp_act_type {
+	ZFCP_ERP_ACTION_REOPEN_UNIT        = 1,
+	ZFCP_ERP_ACTION_REOPEN_PORT	   = 2,
+	ZFCP_ERP_ACTION_REOPEN_PORT_FORCED = 3,
+	ZFCP_ERP_ACTION_REOPEN_ADAPTER     = 4,
+};
+
+enum zfcp_erp_act_state {
+	ZFCP_ERP_ACTION_RUNNING = 1,
+	ZFCP_ERP_ACTION_READY   = 2,
+};
+
+enum zfcp_erp_act_result {
+	ZFCP_ERP_SUCCEEDED = 0,
+	ZFCP_ERP_FAILED    = 1,
+	ZFCP_ERP_CONTINUES = 2,
+	ZFCP_ERP_EXIT      = 3,
+	ZFCP_ERP_DISMISSED = 4,
+	ZFCP_ERP_NOMEM     = 5,
+};
+
+static void zfcp_erp_adapter_block(struct zfcp_adapter *adapter, int mask)
 {
-	/* close queues to ensure that buffers are not accessed by adapter */
-	zfcp_qdio_close(adapter);
-	zfcp_fsf_req_dismiss_all(adapter);
-	/* reset FSF request sequence number */
-	adapter->fsf_req_seq_no = 0;
-	/* all ports and units are closed */
-	zfcp_erp_modify_adapter_status(adapter, 24, NULL,
-				       ZFCP_STATUS_COMMON_OPEN, ZFCP_CLEAR);
+	zfcp_erp_modify_adapter_status(adapter, 15, NULL,
+				       ZFCP_STATUS_COMMON_UNBLOCKED | mask,
+				       ZFCP_CLEAR);
 }
 
-/**
- * zfcp_fsf_request_timeout_handler - called if a request timed out
- * @data: pointer to adapter for handler function
- *
- * This function needs to be called if requests (ELS, Generic Service,
- * or SCSI commands) exceed a certain time limit. The assumption is
- * that after the time limit the adapter get stuck. So we trigger a reopen of
- * the adapter.
- */
-static void zfcp_fsf_request_timeout_handler(unsigned long data)
+static int zfcp_erp_action_exists(struct zfcp_erp_action *act)
 {
-	struct zfcp_adapter *adapter = (struct zfcp_adapter *) data;
-	zfcp_erp_adapter_reopen(adapter, ZFCP_STATUS_COMMON_ERP_FAILED, 62,
-				NULL);
+	struct zfcp_erp_action *curr_act;
+
+	list_for_each_entry(curr_act, &act->adapter->erp_running_head, list)
+		if (act == curr_act)
+			return ZFCP_ERP_ACTION_RUNNING;
+	return 0;
 }
 
-void zfcp_fsf_start_timer(struct zfcp_fsf_req *fsf_req, unsigned long timeout)
+static void zfcp_erp_action_ready(struct zfcp_erp_action *act)
 {
-	fsf_req->timer.function = zfcp_fsf_request_timeout_handler;
-	fsf_req->timer.data = (unsigned long) fsf_req->adapter;
-	fsf_req->timer.expires = jiffies + timeout;
-	add_timer(&fsf_req->timer);
+	struct zfcp_adapter *adapter = act->adapter;
+
+	list_move(&act->list, &act->adapter->erp_ready_head);
+	zfcp_rec_dbf_event_action(146, act);
+	up(&adapter->erp_ready_sem);
+	zfcp_rec_dbf_event_thread(2, adapter);
 }
 
-/*
- * function:
- *
- * purpose:	called if an adapter failed,
- *		initiates adapter recovery which is done
- *		asynchronously
- *
- * returns:	0	- initiated action successfully
- *		<0	- failed to initiate action
- */
-static int zfcp_erp_adapter_reopen_internal(struct zfcp_adapter *adapter,
-					    int clear_mask, u8 id, void *ref)
+static void zfcp_erp_action_dismiss(struct zfcp_erp_action *act)
 {
-	int retval;
+	act->status |= ZFCP_STATUS_ERP_DISMISSED;
+	if (zfcp_erp_action_exists(act) == ZFCP_ERP_ACTION_RUNNING)
+		zfcp_erp_action_ready(act);
+}
 
-	zfcp_erp_adapter_block(adapter, clear_mask);
+static void zfcp_erp_action_dismiss_unit(struct zfcp_unit *unit)
+{
+	if (atomic_read(&unit->status) & ZFCP_STATUS_COMMON_ERP_INUSE)
+		zfcp_erp_action_dismiss(&unit->erp_action);
+}
 
-	if (atomic_test_mask(ZFCP_STATUS_COMMON_ERP_FAILED, &adapter->status)) {
-		/* ensure propagation of failed status to new devices */
-		zfcp_erp_adapter_failed(adapter, 13, NULL);
-		retval = -EIO;
-		goto out;
-	}
-	retval = zfcp_erp_action_enqueue(ZFCP_ERP_ACTION_REOPEN_ADAPTER,
-					 adapter, NULL, NULL, id, ref);
+static void zfcp_erp_action_dismiss_port(struct zfcp_port *port)
+{
+	struct zfcp_unit *unit;
 
- out:
-	return retval;
+	if (atomic_read(&port->status) & ZFCP_STATUS_COMMON_ERP_INUSE)
+		zfcp_erp_action_dismiss(&port->erp_action);
+	else
+		list_for_each_entry(unit, &port->unit_list_head, list)
+		    zfcp_erp_action_dismiss_unit(unit);
 }
 
-/*
- * function:
- *
- * purpose:	Wrappper for zfcp_erp_adapter_reopen_internal
- *              used to ensure the correct locking
- *
- * returns:	0	- initiated action successfully
- *		<0	- failed to initiate action
- */
-int zfcp_erp_adapter_reopen(struct zfcp_adapter *adapter, int clear_mask,
-			    u8 id, void *ref)
+static void zfcp_erp_action_dismiss_adapter(struct zfcp_adapter *adapter)
 {
-	int retval;
-	unsigned long flags;
-
-	read_lock_irqsave(&zfcp_data.config_lock, flags);
-	write_lock(&adapter->erp_lock);
-	retval = zfcp_erp_adapter_reopen_internal(adapter, clear_mask, id, ref);
-	write_unlock(&adapter->erp_lock);
-	read_unlock_irqrestore(&zfcp_data.config_lock, flags);
+	struct zfcp_port *port;
 
-	return retval;
+	if (atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_ERP_INUSE)
+		zfcp_erp_action_dismiss(&adapter->erp_action);
+	else
+		list_for_each_entry(port, &adapter->port_list_head, list)
+		    zfcp_erp_action_dismiss_port(port);
 }
 
-int zfcp_erp_adapter_shutdown(struct zfcp_adapter *adapter, int clear_mask,
-			      u8 id, void *ref)
+static int zfcp_erp_required_act(int want, struct zfcp_adapter *adapter,
+				 struct zfcp_port *port,
+				 struct zfcp_unit *unit)
 {
-	int retval;
+	int need = want;
+	int u_status, p_status, a_status;
 
-	retval = zfcp_erp_adapter_reopen(adapter,
-					 ZFCP_STATUS_COMMON_RUNNING |
-					 ZFCP_STATUS_COMMON_ERP_FAILED |
-					 clear_mask, id, ref);
+	switch (want) {
+	case ZFCP_ERP_ACTION_REOPEN_UNIT:
+		u_status = atomic_read(&unit->status);
+		if (u_status & ZFCP_STATUS_COMMON_ERP_INUSE)
+			return 0;
+		p_status = atomic_read(&port->status);
+		if (!(p_status & ZFCP_STATUS_COMMON_RUNNING) ||
+		      p_status & ZFCP_STATUS_COMMON_ERP_FAILED)
+			return 0;
+		if (!(p_status & ZFCP_STATUS_COMMON_UNBLOCKED))
+			need = ZFCP_ERP_ACTION_REOPEN_PORT;
+		/* fall through */
+	case ZFCP_ERP_ACTION_REOPEN_PORT:
+	case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED:
+		p_status = atomic_read(&port->status);
+		if (p_status & ZFCP_STATUS_COMMON_ERP_INUSE)
+			return 0;
+		a_status = atomic_read(&adapter->status);
+		if (!(a_status & ZFCP_STATUS_COMMON_RUNNING) ||
+		      a_status & ZFCP_STATUS_COMMON_ERP_FAILED)
+			return 0;
+		if (!(a_status & ZFCP_STATUS_COMMON_UNBLOCKED))
+			need = ZFCP_ERP_ACTION_REOPEN_ADAPTER;
+		/* fall through */
+	case ZFCP_ERP_ACTION_REOPEN_ADAPTER:
+		a_status = atomic_read(&adapter->status);
+		if (a_status & ZFCP_STATUS_COMMON_ERP_INUSE)
+			return 0;
+	}
 
-	return retval;
+	return need;
 }
 
-int zfcp_erp_port_shutdown(struct zfcp_port *port, int clear_mask, u8 id,
-			   void *ref)
+static struct zfcp_erp_action *zfcp_erp_setup_act(int need,
+						  struct zfcp_adapter *adapter,
+						  struct zfcp_port *port,
+						  struct zfcp_unit *unit)
 {
-	int retval;
+	struct zfcp_erp_action *erp_action;
+	u32 status = 0;
 
-	retval = zfcp_erp_port_reopen(port,
-				      ZFCP_STATUS_COMMON_RUNNING |
-				      ZFCP_STATUS_COMMON_ERP_FAILED |
-				      clear_mask, id, ref);
+	switch (need) {
+	case ZFCP_ERP_ACTION_REOPEN_UNIT:
+		zfcp_unit_get(unit);
+		atomic_set_mask(ZFCP_STATUS_COMMON_ERP_INUSE, &unit->status);
+		erp_action = &unit->erp_action;
+		if (!(atomic_read(&unit->status) & ZFCP_STATUS_COMMON_RUNNING))
+			status = ZFCP_STATUS_ERP_CLOSE_ONLY;
+		break;
 
-	return retval;
-}
+	case ZFCP_ERP_ACTION_REOPEN_PORT:
+	case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED:
+		zfcp_port_get(port);
+		zfcp_erp_action_dismiss_port(port);
+		atomic_set_mask(ZFCP_STATUS_COMMON_ERP_INUSE, &port->status);
+		erp_action = &port->erp_action;
+		if (!(atomic_read(&port->status) & ZFCP_STATUS_COMMON_RUNNING))
+			status = ZFCP_STATUS_ERP_CLOSE_ONLY;
+		break;
 
-int zfcp_erp_unit_shutdown(struct zfcp_unit *unit, int clear_mask, u8 id,
-			   void *ref)
-{
-	int retval;
+	case ZFCP_ERP_ACTION_REOPEN_ADAPTER:
+		zfcp_adapter_get(adapter);
+		zfcp_erp_action_dismiss_adapter(adapter);
+		atomic_set_mask(ZFCP_STATUS_COMMON_ERP_INUSE, &adapter->status);
+		erp_action = &adapter->erp_action;
+		if (!(atomic_read(&adapter->status) &
+		      ZFCP_STATUS_COMMON_RUNNING))
+			status = ZFCP_STATUS_ERP_CLOSE_ONLY;
+		break;
 
-	retval = zfcp_erp_unit_reopen(unit,
-				      ZFCP_STATUS_COMMON_RUNNING |
-				      ZFCP_STATUS_COMMON_ERP_FAILED |
-				      clear_mask, id, ref);
+	default:
+		return NULL;
+	}
 
-	return retval;
+	memset(erp_action, 0, sizeof(struct zfcp_erp_action));
+	erp_action->adapter = adapter;
+	erp_action->port = port;
+	erp_action->unit = unit;
+	erp_action->action = need;
+	erp_action->status = status;
+
+	return erp_action;
 }
 
-/*
- * function:
- *
- * purpose:	called if a port failed to be opened normally
- *		initiates Forced Reopen recovery which is done
- *		asynchronously
- *
- * returns:	0	- initiated action successfully
- *		<0	- failed to initiate action
- */
-static int zfcp_erp_port_forced_reopen_internal(struct zfcp_port *port,
-						int clear_mask, u8 id,
-						void *ref)
+static int zfcp_erp_action_enqueue(int want, struct zfcp_adapter *adapter,
+				   struct zfcp_port *port,
+				   struct zfcp_unit *unit, u8 id, void *ref)
 {
-	int retval;
+	int retval = 1, need;
+	struct zfcp_erp_action *act = NULL;
 
-	zfcp_erp_port_block(port, clear_mask);
+	if (!(atomic_read(&adapter->status) &
+	      ZFCP_STATUS_ADAPTER_ERP_THREAD_UP))
+		return -EIO;
 
-	if (atomic_test_mask(ZFCP_STATUS_COMMON_ERP_FAILED, &port->status)) {
-		retval = -EIO;
+	need = zfcp_erp_required_act(want, adapter, port, unit);
+	if (!need)
 		goto out;
-	}
-
-	retval = zfcp_erp_action_enqueue(ZFCP_ERP_ACTION_REOPEN_PORT_FORCED,
-					 port->adapter, port, NULL, id, ref);
 
+	atomic_set_mask(ZFCP_STATUS_ADAPTER_ERP_PENDING, &adapter->status);
+	act = zfcp_erp_setup_act(need, adapter, port, unit);
+	if (!act)
+		goto out;
+	++adapter->erp_total_count;
+	list_add_tail(&act->list, &adapter->erp_ready_head);
+	up(&adapter->erp_ready_sem);
+	zfcp_rec_dbf_event_thread(1, adapter);
+	retval = 0;
  out:
+	zfcp_rec_dbf_event_trigger(id, ref, want, need, act,
+				   adapter, port, unit);
 	return retval;
 }
 
-/*
- * function:
- *
- * purpose:	Wrappper for zfcp_erp_port_forced_reopen_internal
- *              used to ensure the correct locking
- *
- * returns:	0	- initiated action successfully
- *		<0	- failed to initiate action
+static int _zfcp_erp_adapter_reopen(struct zfcp_adapter *adapter,
+				    int clear_mask, u8 id, void *ref)
+{
+	zfcp_erp_adapter_block(adapter, clear_mask);
+
+	/* ensure propagation of failed status to new devices */
+	if (atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_ERP_FAILED) {
+		zfcp_erp_adapter_failed(adapter, 13, NULL);
+		return -EIO;
+	}
+	return zfcp_erp_action_enqueue(ZFCP_ERP_ACTION_REOPEN_ADAPTER,
+				       adapter, NULL, NULL, id, ref);
+}
+
+/**
+ * zfcp_erp_adapter_reopen - Reopen adapter.
+ * @adapter: Adapter to reopen.
+ * @clear: Status flags to clear.
+ * @id: Id for debug trace event.
+ * @ref: Reference for debug trace event.
  */
-int zfcp_erp_port_forced_reopen(struct zfcp_port *port, int clear_mask, u8 id,
-				void *ref)
+void zfcp_erp_adapter_reopen(struct zfcp_adapter *adapter, int clear,
+			     u8 id, void *ref)
 {
-	int retval;
 	unsigned long flags;
-	struct zfcp_adapter *adapter;
 
-	adapter = port->adapter;
 	read_lock_irqsave(&zfcp_data.config_lock, flags);
 	write_lock(&adapter->erp_lock);
-	retval = zfcp_erp_port_forced_reopen_internal(port, clear_mask, id,
-						      ref);
+	_zfcp_erp_adapter_reopen(adapter, clear, id, ref);
 	write_unlock(&adapter->erp_lock);
 	read_unlock_irqrestore(&zfcp_data.config_lock, flags);
+}
 
-	return retval;
+/**
+ * zfcp_erp_adapter_shutdown - Shutdown adapter.
+ * @adapter: Adapter to shut down.
+ * @clear: Status flags to clear.
+ * @id: Id for debug trace event.
+ * @ref: Reference for debug trace event.
+ */
+void zfcp_erp_adapter_shutdown(struct zfcp_adapter *adapter, int clear,
+			       u8 id, void *ref)
+{
+	int flags = ZFCP_STATUS_COMMON_RUNNING | ZFCP_STATUS_COMMON_ERP_FAILED;
+	zfcp_erp_adapter_reopen(adapter, clear | flags, id, ref);
 }
 
-/*
- * function:
- *
- * purpose:	called if a port is to be opened
- *		initiates Reopen recovery which is done
- *		asynchronously
- *
- * returns:	0	- initiated action successfully
- *		<0	- failed to initiate action
+/**
+ * zfcp_erp_port_shutdown - Shutdown port
+ * @port: Port to shut down.
+ * @clear: Status flags to clear.
+ * @id: Id for debug trace event.
+ * @ref: Reference for debug trace event.
  */
-static int zfcp_erp_port_reopen_internal(struct zfcp_port *port, int clear_mask,
-					 u8 id, void *ref)
+void zfcp_erp_port_shutdown(struct zfcp_port *port, int clear, u8 id, void *ref)
 {
-	int retval;
+	int flags = ZFCP_STATUS_COMMON_RUNNING | ZFCP_STATUS_COMMON_ERP_FAILED;
+	zfcp_erp_port_reopen(port, clear | flags, id, ref);
+}
+
+/**
+ * zfcp_erp_unit_shutdown - Shutdown unit
+ * @unit: Unit to shut down.
+ * @clear: Status flags to clear.
+ * @id: Id for debug trace event.
+ * @ref: Reference for debug trace event.
+ */
+void zfcp_erp_unit_shutdown(struct zfcp_unit *unit, int clear, u8 id, void *ref)
+{
+	int flags = ZFCP_STATUS_COMMON_RUNNING | ZFCP_STATUS_COMMON_ERP_FAILED;
+	zfcp_erp_unit_reopen(unit, clear | flags, id, ref);
+}
+
+static void zfcp_erp_port_block(struct zfcp_port *port, int clear)
+{
+	zfcp_erp_modify_port_status(port, 17, NULL,
+				    ZFCP_STATUS_COMMON_UNBLOCKED | clear,
+				    ZFCP_CLEAR);
+}
+
+static void _zfcp_erp_port_forced_reopen(struct zfcp_port *port,
+					 int clear, u8 id, void *ref)
+{
+	zfcp_erp_port_block(port, clear);
+
+	if (atomic_read(&port->status) & ZFCP_STATUS_COMMON_ERP_FAILED)
+		return;
+
+	zfcp_erp_action_enqueue(ZFCP_ERP_ACTION_REOPEN_PORT_FORCED,
+				port->adapter, port, NULL, id, ref);
+}
+
+/**
+ * zfcp_erp_port_forced_reopen - Forced close of port and open again
+ * @port: Port to force close and to reopen.
+ * @id: Id for debug trace event.
+ * @ref: Reference for debug trace event.
+ */
+void zfcp_erp_port_forced_reopen(struct zfcp_port *port, int clear, u8 id,
+				 void *ref)
+{
+	unsigned long flags;
+	struct zfcp_adapter *adapter = port->adapter;
+
+	read_lock_irqsave(&zfcp_data.config_lock, flags);
+	write_lock(&adapter->erp_lock);
+	_zfcp_erp_port_forced_reopen(port, clear, id, ref);
+	write_unlock(&adapter->erp_lock);
+	read_unlock_irqrestore(&zfcp_data.config_lock, flags);
+}
 
-	zfcp_erp_port_block(port, clear_mask);
+static int _zfcp_erp_port_reopen(struct zfcp_port *port, int clear, u8 id,
+				 void *ref)
+{
+	zfcp_erp_port_block(port, clear);
 
-	if (atomic_test_mask(ZFCP_STATUS_COMMON_ERP_FAILED, &port->status)) {
+	if (atomic_read(&port->status) & ZFCP_STATUS_COMMON_ERP_FAILED) {
 		/* ensure propagation of failed status to new devices */
 		zfcp_erp_port_failed(port, 14, NULL);
-		retval = -EIO;
-		goto out;
+		return -EIO;
 	}
 
-	retval = zfcp_erp_action_enqueue(ZFCP_ERP_ACTION_REOPEN_PORT,
-					 port->adapter, port, NULL, id, ref);
-
- out:
-	return retval;
+	return zfcp_erp_action_enqueue(ZFCP_ERP_ACTION_REOPEN_PORT,
+				       port->adapter, port, NULL, id, ref);
 }
 
 /**
- * zfcp_erp_port_reopen - initiate reopen of a remote port
- * @port: port to be reopened
- * @clear_mask: specifies flags in port status to be cleared
- * Return: 0 on success, < 0 on error
+ * zfcp_erp_port_reopen - trigger remote port recovery
+ * @port: port to recover
+ * @clear_mask: flags in port status to be cleared
  *
- * This is a wrappper function for zfcp_erp_port_reopen_internal. It ensures
- * correct locking. An error recovery task is initiated to do the reopen.
- * To wait for the completion of the reopen zfcp_erp_wait should be used.
+ * Returns 0 if recovery has been triggered, < 0 if not.
  */
-int zfcp_erp_port_reopen(struct zfcp_port *port, int clear_mask, u8 id,
-			 void *ref)
+int zfcp_erp_port_reopen(struct zfcp_port *port, int clear, u8 id, void *ref)
 {
-	int retval;
 	unsigned long flags;
+	int retval;
 	struct zfcp_adapter *adapter = port->adapter;
 
 	read_lock_irqsave(&zfcp_data.config_lock, flags);
 	write_lock(&adapter->erp_lock);
-	retval = zfcp_erp_port_reopen_internal(port, clear_mask, id, ref);
+	retval = _zfcp_erp_port_reopen(port, clear, id, ref);
 	write_unlock(&adapter->erp_lock);
 	read_unlock_irqrestore(&zfcp_data.config_lock, flags);
 
 	return retval;
 }
 
-/*
- * function:
- *
- * purpose:	called if a unit is to be opened
- *		initiates Reopen recovery which is done
- *		asynchronously
- *
- * returns:	0	- initiated action successfully
- *		<0	- failed to initiate action
- */
-static int zfcp_erp_unit_reopen_internal(struct zfcp_unit *unit, int clear_mask,
-					 u8 id, void *ref)
+static void zfcp_erp_unit_block(struct zfcp_unit *unit, int clear_mask)
+{
+	zfcp_erp_modify_unit_status(unit, 19, NULL,
+				    ZFCP_STATUS_COMMON_UNBLOCKED | clear_mask,
+				    ZFCP_CLEAR);
+}
+
+static void _zfcp_erp_unit_reopen(struct zfcp_unit *unit, int clear, u8 id,
+				  void *ref)
 {
-	int retval;
 	struct zfcp_adapter *adapter = unit->port->adapter;
 
-	zfcp_erp_unit_block(unit, clear_mask);
+	zfcp_erp_unit_block(unit, clear);
 
-	if (atomic_test_mask(ZFCP_STATUS_COMMON_ERP_FAILED, &unit->status)) {
-		retval = -EIO;
-		goto out;
-	}
+	if (atomic_read(&unit->status) & ZFCP_STATUS_COMMON_ERP_FAILED)
+		return;
 
-	retval = zfcp_erp_action_enqueue(ZFCP_ERP_ACTION_REOPEN_UNIT,
-					 adapter, unit->port, unit, id, ref);
- out:
-	return retval;
+	zfcp_erp_action_enqueue(ZFCP_ERP_ACTION_REOPEN_UNIT,
+				adapter, unit->port, unit, id, ref);
 }
 
 /**
@@ -382,790 +408,655 @@ static int zfcp_erp_unit_reopen_internal
  * @unit: unit to be reopened
  * @clear_mask: specifies flags in unit status to be cleared
  * Return: 0 on success, < 0 on error
- *
- * This is a wrappper for zfcp_erp_unit_reopen_internal. It ensures correct
- * locking. An error recovery task is initiated to do the reopen.
- * To wait for the completion of the reopen zfcp_erp_wait should be used.
  */
-int zfcp_erp_unit_reopen(struct zfcp_unit *unit, int clear_mask, u8 id,
-			 void *ref)
+void zfcp_erp_unit_reopen(struct zfcp_unit *unit, int clear, u8 id, void *ref)
 {
-	int retval;
 	unsigned long flags;
-	struct zfcp_adapter *adapter;
-	struct zfcp_port *port;
-
-	port = unit->port;
-	adapter = port->adapter;
+	struct zfcp_port *port = unit->port;
+	struct zfcp_adapter *adapter = port->adapter;
 
 	read_lock_irqsave(&zfcp_data.config_lock, flags);
 	write_lock(&adapter->erp_lock);
-	retval = zfcp_erp_unit_reopen_internal(unit, clear_mask, id, ref);
+	_zfcp_erp_unit_reopen(unit, clear, id, ref);
 	write_unlock(&adapter->erp_lock);
 	read_unlock_irqrestore(&zfcp_data.config_lock, flags);
-
-	return retval;
-}
-
-/**
- * zfcp_erp_adapter_block - mark adapter as blocked, block scsi requests
- */
-static void zfcp_erp_adapter_block(struct zfcp_adapter *adapter, int clear_mask)
-{
-	zfcp_erp_modify_adapter_status(adapter, 15, NULL,
-				       ZFCP_STATUS_COMMON_UNBLOCKED |
-				       clear_mask, ZFCP_CLEAR);
 }
 
-/* FIXME: isn't really atomic */
-/*
- * returns the mask which has not been set so far, i.e.
- * 0 if no bit has been changed, !0 if some bit has been changed
- */
-static int atomic_test_and_set_mask(unsigned long mask, atomic_t *v)
+static int status_change_set(unsigned long mask, atomic_t *status)
 {
-	int changed_bits = (atomic_read(v) /*XOR*/^ mask) & mask;
-	atomic_set_mask(mask, v);
-	return changed_bits;
+	return (atomic_read(status) ^ mask) & mask;
 }
 
-/* FIXME: isn't really atomic */
-/*
- * returns the mask which has not been cleared so far, i.e.
- * 0 if no bit has been changed, !0 if some bit has been changed
- */
-static int atomic_test_and_clear_mask(unsigned long mask, atomic_t *v)
+static int status_change_clear(unsigned long mask, atomic_t *status)
 {
-	int changed_bits = atomic_read(v) & mask;
-	atomic_clear_mask(mask, v);
-	return changed_bits;
+	return atomic_read(status) & mask;
 }
 
-/**
- * zfcp_erp_adapter_unblock - mark adapter as unblocked, allow scsi requests
- */
 static void zfcp_erp_adapter_unblock(struct zfcp_adapter *adapter)
 {
-	if (atomic_test_and_set_mask(ZFCP_STATUS_COMMON_UNBLOCKED,
-				     &adapter->status))
+	if (status_change_set(ZFCP_STATUS_COMMON_UNBLOCKED, &adapter->status))
 		zfcp_rec_dbf_event_adapter(16, NULL, adapter);
+	atomic_set_mask(ZFCP_STATUS_COMMON_UNBLOCKED, &adapter->status);
 }
 
-/*
- * function:
- *
- * purpose:	disable I/O,
- *		return any open requests and clean them up,
- *		aim: no pending and incoming I/O
- *
- * returns:
- */
-static void
-zfcp_erp_port_block(struct zfcp_port *port, int clear_mask)
+static void zfcp_erp_port_unblock(struct zfcp_port *port)
 {
-	zfcp_erp_modify_port_status(port, 17, NULL,
-				    ZFCP_STATUS_COMMON_UNBLOCKED | clear_mask,
-				    ZFCP_CLEAR);
+	if (status_change_set(ZFCP_STATUS_COMMON_UNBLOCKED, &port->status))
+		zfcp_rec_dbf_event_port(18, NULL, port);
+	atomic_set_mask(ZFCP_STATUS_COMMON_UNBLOCKED, &port->status);
 }
 
-/*
- * function:
- *
- * purpose:	enable I/O
- *
- * returns:
- */
-static void
-zfcp_erp_port_unblock(struct zfcp_port *port)
+static void zfcp_erp_unit_unblock(struct zfcp_unit *unit)
 {
-	if (atomic_test_and_set_mask(ZFCP_STATUS_COMMON_UNBLOCKED,
-				     &port->status))
-		zfcp_rec_dbf_event_port(18, NULL, port);
+	if (status_change_set(ZFCP_STATUS_COMMON_UNBLOCKED, &unit->status))
+		zfcp_rec_dbf_event_unit(20, NULL, unit);
+	atomic_set_mask(ZFCP_STATUS_COMMON_UNBLOCKED, &unit->status);
 }
 
-/*
- * function:
- *
- * purpose:	disable I/O,
- *		return any open requests and clean them up,
- *		aim: no pending and incoming I/O
- *
- * returns:
- */
-static void
-zfcp_erp_unit_block(struct zfcp_unit *unit, int clear_mask)
+static void zfcp_erp_action_to_running(struct zfcp_erp_action *erp_action)
 {
-	zfcp_erp_modify_unit_status(unit, 19, NULL,
-				    ZFCP_STATUS_COMMON_UNBLOCKED | clear_mask,
-				    ZFCP_CLEAR);
+	list_move(&erp_action->list, &erp_action->adapter->erp_running_head);
+	zfcp_rec_dbf_event_action(145, erp_action);
 }
 
-/*
- * function:
- *
- * purpose:	enable I/O
- *
- * returns:
- */
-static void
-zfcp_erp_unit_unblock(struct zfcp_unit *unit)
+static void zfcp_erp_strategy_check_fsfreq(struct zfcp_erp_action *act)
 {
-	if (atomic_test_and_set_mask(ZFCP_STATUS_COMMON_UNBLOCKED,
-				     &unit->status))
-		zfcp_rec_dbf_event_unit(20, NULL, unit);
+	struct zfcp_adapter *adapter = act->adapter;
+
+	if (!act->fsf_req)
+		return;
+
+	spin_lock(&adapter->req_list_lock);
+	if (zfcp_reqlist_find_safe(adapter, act->fsf_req) &&
+	    act->fsf_req->erp_action == act) {
+		if (act->status & (ZFCP_STATUS_ERP_DISMISSED |
+				   ZFCP_STATUS_ERP_TIMEDOUT)) {
+			act->fsf_req->status |= ZFCP_STATUS_FSFREQ_DISMISSED;
+			zfcp_rec_dbf_event_action(142, act);
+		}
+		if (act->status & ZFCP_STATUS_ERP_TIMEDOUT)
+			zfcp_rec_dbf_event_action(143, act);
+		if (act->fsf_req->status & (ZFCP_STATUS_FSFREQ_COMPLETED |
+					    ZFCP_STATUS_FSFREQ_DISMISSED))
+			act->fsf_req = NULL;
+	} else
+		act->fsf_req = NULL;
+	spin_unlock(&adapter->req_list_lock);
 }
 
-static void
-zfcp_erp_action_ready(struct zfcp_erp_action *erp_action)
+/**
+ * zfcp_erp_notify - Trigger ERP action.
+ * @erp_action: ERP action to continue.
+ * @set_mask: ERP action status flags to set.
+ */
+void zfcp_erp_notify(struct zfcp_erp_action *erp_action, unsigned long set_mask)
 {
 	struct zfcp_adapter *adapter = erp_action->adapter;
+	unsigned long flags;
 
-	zfcp_erp_action_to_ready(erp_action);
-	up(&adapter->erp_ready_sem);
-	zfcp_rec_dbf_event_thread(2, adapter);
-}
-
-/*
- * function:
- *
- * purpose:
- *
- * returns:	<0			erp_action not found in any list
- *		ZFCP_ERP_ACTION_READY	erp_action is in ready list
- *		ZFCP_ERP_ACTION_RUNNING	erp_action is in running list
- *
- * locks:	erp_lock must be held
- */
-static int
-zfcp_erp_action_exists(struct zfcp_erp_action *erp_action)
-{
-	int retval = -EINVAL;
-	struct list_head *entry;
-	struct zfcp_erp_action *entry_erp_action;
-	struct zfcp_adapter *adapter = erp_action->adapter;
-
-	/* search in running list */
-	list_for_each(entry, &adapter->erp_running_head) {
-		entry_erp_action =
-		    list_entry(entry, struct zfcp_erp_action, list);
-		if (entry_erp_action == erp_action) {
-			retval = ZFCP_ERP_ACTION_RUNNING;
-			goto out;
-		}
-	}
-	/* search in ready list */
-	list_for_each(entry, &adapter->erp_ready_head) {
-		entry_erp_action =
-		    list_entry(entry, struct zfcp_erp_action, list);
-		if (entry_erp_action == erp_action) {
-			retval = ZFCP_ERP_ACTION_READY;
-			goto out;
-		}
-	}
-
- out:
-	return retval;
-}
-
-/*
- * purpose:	checks current status of action (timed out, dismissed, ...)
- *		and does appropriate preparations (dismiss fsf request, ...)
- *
- * locks:	called under erp_lock (disabled interrupts)
- */
-static void
-zfcp_erp_strategy_check_fsfreq(struct zfcp_erp_action *erp_action)
-{
-	struct zfcp_adapter *adapter = erp_action->adapter;
-
-	if (erp_action->fsf_req) {
-		/* take lock to ensure that request is not deleted meanwhile */
-		spin_lock(&adapter->req_list_lock);
-		if (zfcp_reqlist_find_safe(adapter, erp_action->fsf_req) &&
-		    erp_action->fsf_req->erp_action == erp_action) {
-			/* fsf_req still exists */
-			/* dismiss fsf_req of timed out/dismissed erp_action */
-			if (erp_action->status & (ZFCP_STATUS_ERP_DISMISSED |
-						  ZFCP_STATUS_ERP_TIMEDOUT)) {
-				erp_action->fsf_req->status |=
-					ZFCP_STATUS_FSFREQ_DISMISSED;
-				zfcp_rec_dbf_event_action(142, erp_action);
-			}
-			if (erp_action->status & ZFCP_STATUS_ERP_TIMEDOUT)
-				zfcp_rec_dbf_event_action(143, erp_action);
-			/*
-			 * If fsf_req is neither dismissed nor completed
-			 * then keep it running asynchronously and don't mess
-			 * with the association of erp_action and fsf_req.
-			 */
-			if (erp_action->fsf_req->status &
-					(ZFCP_STATUS_FSFREQ_COMPLETED |
-					       ZFCP_STATUS_FSFREQ_DISMISSED)) {
-				/* forget about association between fsf_req
-				   and erp_action */
-				erp_action->fsf_req = NULL;
-			}
-		} else {
-			/*
-			 * even if this fsf_req has gone, forget about
-			 * association between erp_action and fsf_req
-			 */
-			erp_action->fsf_req = NULL;
-		}
-		spin_unlock(&adapter->req_list_lock);
-	}
-}
-
-/**
- * zfcp_erp_async_handler_nolock - complete erp_action
- *
- * Used for normal completion, time-out, dismissal and failure after
- * low memory condition.
- */
-static void zfcp_erp_async_handler_nolock(struct zfcp_erp_action *erp_action,
-					  unsigned long set_mask)
-{
+	write_lock_irqsave(&adapter->erp_lock, flags);
 	if (zfcp_erp_action_exists(erp_action) == ZFCP_ERP_ACTION_RUNNING) {
 		erp_action->status |= set_mask;
 		zfcp_erp_action_ready(erp_action);
-	} else {
-		/* action is ready or gone - nothing to do */
 	}
+	write_unlock_irqrestore(&adapter->erp_lock, flags);
 }
 
 /**
- * zfcp_erp_async_handler - wrapper for erp_async_handler_nolock w/ locking
+ * zfcp_erp_timeout_handler - Trigger ERP action from timed out ERP request
+ * @data: ERP action (from timer data)
  */
-void zfcp_erp_async_handler(struct zfcp_erp_action *erp_action,
-			    unsigned long set_mask)
+void zfcp_erp_timeout_handler(unsigned long data)
 {
-	struct zfcp_adapter *adapter = erp_action->adapter;
-	unsigned long flags;
-
-	write_lock_irqsave(&adapter->erp_lock, flags);
-	zfcp_erp_async_handler_nolock(erp_action, set_mask);
-	write_unlock_irqrestore(&adapter->erp_lock, flags);
+	struct zfcp_erp_action *act = (struct zfcp_erp_action *) data;
+	zfcp_erp_notify(act, ZFCP_STATUS_ERP_TIMEDOUT);
 }
 
-/*
- * purpose:	is called for erp_action which was slept waiting for
- *		memory becoming avaliable,
- *		will trigger that this action will be continued
- */
-static void
-zfcp_erp_memwait_handler(unsigned long data)
+static void zfcp_erp_memwait_handler(unsigned long data)
 {
-	struct zfcp_erp_action *erp_action = (struct zfcp_erp_action *) data;
-
-	zfcp_erp_async_handler(erp_action, 0);
+	zfcp_erp_notify((struct zfcp_erp_action *)data, 0);
 }
 
-/*
- * purpose:	is called if an asynchronous erp step timed out,
- *		action gets an appropriate flag and will be processed
- *		accordingly
- */
-static void zfcp_erp_timeout_handler(unsigned long data)
+static void zfcp_erp_strategy_memwait(struct zfcp_erp_action *erp_action)
 {
-	struct zfcp_erp_action *erp_action = (struct zfcp_erp_action *) data;
-
-	zfcp_erp_async_handler(erp_action, ZFCP_STATUS_ERP_TIMEDOUT);
+	init_timer(&erp_action->timer);
+	erp_action->timer.function = zfcp_erp_memwait_handler;
+	erp_action->timer.data = (unsigned long) erp_action;
+	erp_action->timer.expires = jiffies + HZ;
+	add_timer(&erp_action->timer);
 }
 
-/**
- * zfcp_erp_action_dismiss - dismiss an erp_action
- *
- * adapter->erp_lock must be held
- *
- * Dismissal of an erp_action is usually required if an erp_action of
- * higher priority is generated.
- */
-static void zfcp_erp_action_dismiss(struct zfcp_erp_action *erp_action)
+static void _zfcp_erp_port_reopen_all(struct zfcp_adapter *adapter,
+				      int clear, u8 id, void *ref)
 {
-	erp_action->status |= ZFCP_STATUS_ERP_DISMISSED;
-	if (zfcp_erp_action_exists(erp_action) == ZFCP_ERP_ACTION_RUNNING)
-		zfcp_erp_action_ready(erp_action);
+	struct zfcp_port *port;
+
+	list_for_each_entry(port, &adapter->port_list_head, list)
+		if (!atomic_read(&port->status) & ZFCP_STATUS_PORT_WKA)
+			_zfcp_erp_port_reopen(port, clear, id, ref);
 }
 
-int
-zfcp_erp_thread_setup(struct zfcp_adapter *adapter)
+static void _zfcp_erp_unit_reopen_all(struct zfcp_port *port, int clear, u8 id,
+				      void *ref)
 {
-	int retval = 0;
-
-	atomic_clear_mask(ZFCP_STATUS_ADAPTER_ERP_THREAD_UP, &adapter->status);
-
-	retval = kernel_thread(zfcp_erp_thread, adapter, SIGCHLD);
-	if (retval < 0)
-		dev_err(&adapter->ccw_device->dev,
-			"Creation of ERP thread failed.\n");
-	else {
-		wait_event(adapter->erp_thread_wqh,
-			   atomic_test_mask(ZFCP_STATUS_ADAPTER_ERP_THREAD_UP,
-					    &adapter->status));
-	}
+	struct zfcp_unit *unit;
 
-	return (retval < 0);
+	list_for_each_entry(unit, &port->unit_list_head, list)
+		_zfcp_erp_unit_reopen(unit, clear, id, ref);
 }
 
-/*
- * function:
- *
- * purpose:
- *
- * returns:
- *
- * context:	process (i.e. proc-fs or rmmod/insmod)
- *
- * note:	The caller of this routine ensures that the specified
- *		adapter has been shut down and that this operation
- *		has been completed. Thus, there are no pending erp_actions
- *		which would need to be handled here.
- */
-int
-zfcp_erp_thread_kill(struct zfcp_adapter *adapter)
+static void zfcp_erp_strategy_followup_actions(struct zfcp_erp_action *act)
 {
-	int retval = 0;
+	struct zfcp_adapter *adapter = act->adapter;
+	struct zfcp_port *port = act->port;
+	struct zfcp_unit *unit = act->unit;
+	u32 status = act->status;
 
-	atomic_set_mask(ZFCP_STATUS_ADAPTER_ERP_THREAD_KILL, &adapter->status);
-	up(&adapter->erp_ready_sem);
-	zfcp_rec_dbf_event_thread_lock(2, adapter);
+	/* initiate follow-up actions depending on success of finished action */
+	switch (act->action) {
 
-	wait_event(adapter->erp_thread_wqh,
-		   !atomic_test_mask(ZFCP_STATUS_ADAPTER_ERP_THREAD_UP,
-				     &adapter->status));
+	case ZFCP_ERP_ACTION_REOPEN_ADAPTER:
+		if (status == ZFCP_ERP_SUCCEEDED)
+			_zfcp_erp_port_reopen_all(adapter, 0, 70, NULL);
+		else
+			_zfcp_erp_adapter_reopen(adapter, 0, 71, NULL);
+		break;
 
-	atomic_clear_mask(ZFCP_STATUS_ADAPTER_ERP_THREAD_KILL,
-			  &adapter->status);
+	case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED:
+		if (status == ZFCP_ERP_SUCCEEDED)
+			_zfcp_erp_port_reopen(port, 0, 72, NULL);
+		else
+			_zfcp_erp_adapter_reopen(adapter, 0, 73, NULL);
+		break;
 
-	return retval;
+	case ZFCP_ERP_ACTION_REOPEN_PORT:
+		if (status == ZFCP_ERP_SUCCEEDED)
+			_zfcp_erp_unit_reopen_all(port, 0, 74, NULL);
+		else
+			_zfcp_erp_port_forced_reopen(port, 0, 75, NULL);
+		break;
+
+	case ZFCP_ERP_ACTION_REOPEN_UNIT:
+		if (status != ZFCP_ERP_SUCCEEDED)
+			_zfcp_erp_port_reopen(unit->port, 0, 76, NULL);
+		break;
+	}
 }
 
-/*
- * purpose:	is run as a kernel thread,
- *		goes through list of error recovery actions of associated adapter
- *		and delegates single action to execution
- *
- * returns:	0
- */
-static int
-zfcp_erp_thread(void *data)
+static void zfcp_erp_wakeup(struct zfcp_adapter *adapter)
 {
-	struct zfcp_adapter *adapter = (struct zfcp_adapter *) data;
-	struct list_head *next;
-	struct zfcp_erp_action *erp_action;
 	unsigned long flags;
 
-	daemonize("zfcperp%s", zfcp_get_busid_by_adapter(adapter));
-	/* Block all signals */
-	siginitsetinv(&current->blocked, 0);
-	atomic_set_mask(ZFCP_STATUS_ADAPTER_ERP_THREAD_UP, &adapter->status);
-	wake_up(&adapter->erp_thread_wqh);
-
-	while (!atomic_test_mask(ZFCP_STATUS_ADAPTER_ERP_THREAD_KILL,
-				 &adapter->status)) {
-
-		write_lock_irqsave(&adapter->erp_lock, flags);
-		next = adapter->erp_ready_head.next;
-		write_unlock_irqrestore(&adapter->erp_lock, flags);
-
-		if (next != &adapter->erp_ready_head) {
-			erp_action =
-			    list_entry(next, struct zfcp_erp_action, list);
-			/*
-			 * process action (incl. [re]moving it
-			 * from 'ready' queue)
-			 */
-			zfcp_erp_strategy(erp_action);
-		}
-
-		/*
-		 * sleep as long as there is nothing to do, i.e.
-		 * no action in 'ready' queue to be processed and
-		 * thread is not to be killed
-		 */
-		zfcp_rec_dbf_event_thread_lock(4, adapter);
-		down_interruptible(&adapter->erp_ready_sem);
-		zfcp_rec_dbf_event_thread_lock(5, adapter);
+	read_lock_irqsave(&zfcp_data.config_lock, flags);
+	read_lock(&adapter->erp_lock);
+	if (list_empty(&adapter->erp_ready_head) &&
+	    list_empty(&adapter->erp_running_head)) {
+			atomic_clear_mask(ZFCP_STATUS_ADAPTER_ERP_PENDING,
+					  &adapter->status);
+			wake_up(&adapter->erp_done_wqh);
 	}
+	read_unlock(&adapter->erp_lock);
+	read_unlock_irqrestore(&zfcp_data.config_lock, flags);
+}
 
-	atomic_clear_mask(ZFCP_STATUS_ADAPTER_ERP_THREAD_UP, &adapter->status);
-	wake_up(&adapter->erp_thread_wqh);
+static int zfcp_erp_adapter_strategy_open_qdio(struct zfcp_erp_action *act)
+{
+	if (zfcp_qdio_open(act->adapter))
+		return ZFCP_ERP_FAILED;
+	init_waitqueue_head(&act->adapter->request_wq);
+	atomic_set_mask(ZFCP_STATUS_ADAPTER_QDIOUP, &act->adapter->status);
+	return ZFCP_ERP_SUCCEEDED;
+}
 
-	return 0;
+static void zfcp_erp_enqueue_ptp_port(struct zfcp_adapter *adapter)
+{
+	struct zfcp_port *port;
+	port = zfcp_port_enqueue(adapter, adapter->peer_wwpn, 0,
+				 adapter->peer_d_id);
+	if (IS_ERR(port)) /* error or port already attached */
+		return;
+	_zfcp_erp_port_reopen(port, 0, 150, NULL);
 }
 
-/*
- * function:
- *
- * purpose:	drives single error recovery action and schedules higher and
- *		subordinate actions, if necessary
- *
- * returns:	ZFCP_ERP_CONTINUES	- action continues (asynchronously)
- *		ZFCP_ERP_SUCCEEDED	- action finished successfully (deqd)
- *		ZFCP_ERP_FAILED		- action finished unsuccessfully (deqd)
- *		ZFCP_ERP_EXIT		- action finished (dequeued), offline
- *		ZFCP_ERP_DISMISSED	- action canceled (dequeued)
- */
-static int
-zfcp_erp_strategy(struct zfcp_erp_action *erp_action)
+static int zfcp_erp_adapter_strat_fsf_xconf(struct zfcp_erp_action *erp_action)
 {
-	int retval = 0;
+	int retries;
+	int sleep = 1;
 	struct zfcp_adapter *adapter = erp_action->adapter;
-	struct zfcp_port *port = erp_action->port;
-	struct zfcp_unit *unit = erp_action->unit;
-	int action = erp_action->action;
-	u32 status = erp_action->status;
-	unsigned long flags;
-
-	/* serialise dismissing, timing out, moving, enqueueing */
-	read_lock_irqsave(&zfcp_data.config_lock, flags);
-	write_lock(&adapter->erp_lock);
 
-	/* dequeue dismissed action and leave, if required */
-	retval = zfcp_erp_strategy_check_action(erp_action, retval);
-	if (retval == ZFCP_ERP_DISMISSED) {
-		goto unlock;
-	}
+	atomic_clear_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK, &adapter->status);
 
-	/*
-	 * move action to 'running' queue before processing it
-	 * (to avoid a race condition regarding moving the
-	 * action to the 'running' queue and back)
-	 */
-	zfcp_erp_action_to_running(erp_action);
+	for (retries = 7; retries; retries--) {
+		atomic_clear_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT,
+				  &adapter->status);
+		write_lock_irq(&adapter->erp_lock);
+		zfcp_erp_action_to_running(erp_action);
+		write_unlock_irq(&adapter->erp_lock);
+		if (zfcp_fsf_exchange_config_data(erp_action)) {
+			atomic_clear_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT,
+					  &adapter->status);
+			return ZFCP_ERP_FAILED;
+		}
 
-	/*
-	 * try to process action as far as possible,
-	 * no lock to allow for blocking operations (kmalloc, qdio, ...),
-	 * afterwards the lock is required again for the following reasons:
-	 * - dequeueing of finished action and enqueueing of
-	 *   follow-up actions must be atomic so that any other
-	 *   reopen-routine does not believe there is nothing to do
-	 *   and that it is safe to enqueue something else,
-	 * - we want to force any control thread which is dismissing
-	 *   actions to finish this before we decide about
-	 *   necessary steps to be taken here further
-	 */
-	write_unlock(&adapter->erp_lock);
-	read_unlock_irqrestore(&zfcp_data.config_lock, flags);
-	retval = zfcp_erp_strategy_do_action(erp_action);
-	read_lock_irqsave(&zfcp_data.config_lock, flags);
-	write_lock(&adapter->erp_lock);
+		zfcp_rec_dbf_event_thread_lock(6, adapter);
+		down(&adapter->erp_ready_sem);
+		zfcp_rec_dbf_event_thread_lock(7, adapter);
+		if (erp_action->status & ZFCP_STATUS_ERP_TIMEDOUT)
+			break;
 
-	/*
-	 * check for dismissed status again to avoid follow-up actions,
-	 * failing of targets and so on for dismissed actions,
-	 * we go through down() here because there has been an up()
-	 */
-	if (erp_action->status & ZFCP_STATUS_ERP_DISMISSED)
-		retval = ZFCP_ERP_CONTINUES;
+		if (!(atomic_read(&adapter->status) &
+		      ZFCP_STATUS_ADAPTER_HOST_CON_INIT))
+			break;
 
-	switch (retval) {
-	case ZFCP_ERP_NOMEM:
-		/* no memory to continue immediately, let it sleep */
-		if (!(erp_action->status & ZFCP_STATUS_ERP_LOWMEM)) {
-			++adapter->erp_low_mem_count;
-			erp_action->status |= ZFCP_STATUS_ERP_LOWMEM;
-		}
-		/* This condition is true if there is no memory available
-		   for any erp_action on this adapter. This implies that there
-		   are no elements in the memory pool(s) left for erp_actions.
-		   This might happen if an erp_action that used a memory pool
-		   element was timed out.
-		 */
-		if (adapter->erp_total_count == adapter->erp_low_mem_count)
-			zfcp_erp_adapter_reopen_internal(adapter, 0, 66, NULL);
-		else
-			retval = zfcp_erp_strategy_memwait(erp_action);
-		goto unlock;
-	case ZFCP_ERP_CONTINUES:
-		/* leave since this action runs asynchronously */
-		if (erp_action->status & ZFCP_STATUS_ERP_LOWMEM) {
-			--adapter->erp_low_mem_count;
-			erp_action->status &= ~ZFCP_STATUS_ERP_LOWMEM;
-		}
-		goto unlock;
+		ssleep(sleep);
+		sleep *= 2;
 	}
-	/* ok, finished action (whatever its result is) */
 
-	/* check for unrecoverable targets */
-	retval = zfcp_erp_strategy_check_target(erp_action, retval);
+	atomic_clear_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT,
+			  &adapter->status);
 
-	/* action must be dequeued (here to allow for further ones) */
-	zfcp_erp_action_dequeue(erp_action);
+	if (!(atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_XCONFIG_OK))
+		return ZFCP_ERP_FAILED;
 
-	/*
-	 * put this target through the erp mill again if someone has
-	 * requested to change the status of a target being online
-	 * to offline or the other way around
-	 * (old retval is preserved if nothing has to be done here)
-	 */
-	retval = zfcp_erp_strategy_statechange(action, status, adapter,
-					       port, unit, retval);
-
-	/*
-	 * leave if target is in permanent error state or if
-	 * action is repeated in order to process state change
-	 */
-	if (retval == ZFCP_ERP_EXIT) {
-		goto unlock;
-	}
+	if (fc_host_port_type(adapter->scsi_host) == FC_PORTTYPE_PTP)
+		zfcp_erp_enqueue_ptp_port(adapter);
 
-	/* trigger follow up actions */
-	zfcp_erp_strategy_followup_actions(action, adapter, port, unit, retval);
+	return ZFCP_ERP_SUCCEEDED;
+}
 
- unlock:
-	write_unlock(&adapter->erp_lock);
-	read_unlock_irqrestore(&zfcp_data.config_lock, flags);
+static int zfcp_erp_adapter_strategy_open_fsf_xport(struct zfcp_erp_action *act)
+{
+	int ret;
+	struct zfcp_adapter *adapter = act->adapter;
 
-	if (retval != ZFCP_ERP_CONTINUES)
-		zfcp_erp_action_cleanup(action, adapter, port, unit, retval);
+	atomic_clear_mask(ZFCP_STATUS_ADAPTER_XPORT_OK, &adapter->status);
 
-	/*
-	 * a few tasks remain when the erp queues are empty
-	 * (don't do that if the last action evaluated was dismissed
-	 * since this clearly indicates that there is more to come) :
-	 * - close the name server port if it is open yet
-	 *   (enqueues another [probably] final action)
-	 * - otherwise, wake up whoever wants to be woken when we are
-	 *   done with erp
-	 */
-	if (retval != ZFCP_ERP_DISMISSED)
-		zfcp_erp_strategy_check_queues(adapter);
+	write_lock_irq(&adapter->erp_lock);
+	zfcp_erp_action_to_running(act);
+	write_unlock_irq(&adapter->erp_lock);
 
-	return retval;
+	ret = zfcp_fsf_exchange_port_data(act);
+	if (ret == -EOPNOTSUPP)
+		return ZFCP_ERP_SUCCEEDED;
+	if (ret)
+		return ZFCP_ERP_FAILED;
+
+	zfcp_rec_dbf_event_thread_lock(8, adapter);
+	down(&adapter->erp_ready_sem);
+	zfcp_rec_dbf_event_thread_lock(9, adapter);
+	if (act->status & ZFCP_STATUS_ERP_TIMEDOUT)
+		return ZFCP_ERP_FAILED;
+
+	return ZFCP_ERP_SUCCEEDED;
 }
 
-/*
- * function:
- *
- * purpose:
- *
- * returns:	ZFCP_ERP_DISMISSED	- if action has been dismissed
- *		retval			- otherwise
- */
-static int
-zfcp_erp_strategy_check_action(struct zfcp_erp_action *erp_action, int retval)
+static int zfcp_erp_adapter_strategy_open_fsf(struct zfcp_erp_action *act)
 {
-	zfcp_erp_strategy_check_fsfreq(erp_action);
+	if (zfcp_erp_adapter_strat_fsf_xconf(act) == ZFCP_ERP_FAILED)
+		return ZFCP_ERP_FAILED;
 
-	if (erp_action->status & ZFCP_STATUS_ERP_DISMISSED) {
-		zfcp_erp_action_dequeue(erp_action);
-		retval = ZFCP_ERP_DISMISSED;
-	}
+	if (zfcp_erp_adapter_strategy_open_fsf_xport(act) == ZFCP_ERP_FAILED)
+		return ZFCP_ERP_FAILED;
 
-	return retval;
+	atomic_set(&act->adapter->stat_miss, 16);
+	if (zfcp_status_read_refill(act->adapter))
+		return ZFCP_ERP_FAILED;
+
+	return ZFCP_ERP_SUCCEEDED;
 }
 
-static int
-zfcp_erp_strategy_do_action(struct zfcp_erp_action *erp_action)
+static int zfcp_erp_adapter_strategy_generic(struct zfcp_erp_action *act,
+					     int close)
 {
-	int retval = ZFCP_ERP_FAILED;
+	int retval = ZFCP_ERP_SUCCEEDED;
+	struct zfcp_adapter *adapter = act->adapter;
 
-	/*
-	 * try to execute/continue action as far as possible,
-	 * note: no lock in subsequent strategy routines
-	 * (this allows these routine to call schedule, e.g.
-	 * kmalloc with such flags or qdio_initialize & friends)
-	 * Note: in case of timeout, the separate strategies will fail
-	 * anyhow. No need for a special action. Even worse, a nameserver
-	 * failure would not wake up waiting ports without the call.
-	 */
-	switch (erp_action->action) {
+	if (close)
+		goto close_only;
 
-	case ZFCP_ERP_ACTION_REOPEN_ADAPTER:
-		retval = zfcp_erp_adapter_strategy(erp_action);
-		break;
+	retval = zfcp_erp_adapter_strategy_open_qdio(act);
+	if (retval != ZFCP_ERP_SUCCEEDED)
+		goto failed_qdio;
 
-	case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED:
-		retval = zfcp_erp_port_forced_strategy(erp_action);
-		break;
+	retval = zfcp_erp_adapter_strategy_open_fsf(act);
+	if (retval != ZFCP_ERP_SUCCEEDED)
+		goto failed_openfcp;
 
-	case ZFCP_ERP_ACTION_REOPEN_PORT:
-		retval = zfcp_erp_port_strategy(erp_action);
-		break;
+	atomic_set_mask(ZFCP_STATUS_COMMON_OPEN, &act->adapter->status);
+	schedule_work(&act->adapter->scan_work);
 
-	case ZFCP_ERP_ACTION_REOPEN_UNIT:
-		retval = zfcp_erp_unit_strategy(erp_action);
-		break;
-	}
+	return ZFCP_ERP_SUCCEEDED;
 
-	return retval;
+ close_only:
+	atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
+			  &act->adapter->status);
+
+ failed_openfcp:
+	/* close queues to ensure that buffers are not accessed by adapter */
+	zfcp_qdio_close(adapter);
+	zfcp_fsf_req_dismiss_all(adapter);
+	adapter->fsf_req_seq_no = 0;
+	/* all ports and units are closed */
+	zfcp_erp_modify_adapter_status(adapter, 24, NULL,
+				       ZFCP_STATUS_COMMON_OPEN, ZFCP_CLEAR);
+ failed_qdio:
+	atomic_clear_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK |
+			  ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED |
+			  ZFCP_STATUS_ADAPTER_XPORT_OK,
+			  &act->adapter->status);
+	return retval;
 }
 
-/*
- * function:
- *
- * purpose:	triggers retry of this action after a certain amount of time
- *		by means of timer provided by erp_action
- *
- * returns:	ZFCP_ERP_CONTINUES - erp_action sleeps in erp running queue
- */
-static int
-zfcp_erp_strategy_memwait(struct zfcp_erp_action *erp_action)
+static int zfcp_erp_adapter_strategy(struct zfcp_erp_action *act)
 {
-	int retval = ZFCP_ERP_CONTINUES;
+	int retval;
 
-	init_timer(&erp_action->timer);
-	erp_action->timer.function = zfcp_erp_memwait_handler;
-	erp_action->timer.data = (unsigned long) erp_action;
-	erp_action->timer.expires = jiffies + ZFCP_ERP_MEMWAIT_TIMEOUT;
-	add_timer(&erp_action->timer);
+	atomic_set_mask(ZFCP_STATUS_COMMON_CLOSING, &act->adapter->status);
+	zfcp_erp_adapter_strategy_generic(act, 1); /* close */
+	atomic_clear_mask(ZFCP_STATUS_COMMON_CLOSING, &act->adapter->status);
+	if (act->status & ZFCP_STATUS_ERP_CLOSE_ONLY)
+		return ZFCP_ERP_EXIT;
+
+	atomic_set_mask(ZFCP_STATUS_COMMON_OPENING, &act->adapter->status);
+	retval = zfcp_erp_adapter_strategy_generic(act, 0); /* open */
+	atomic_clear_mask(ZFCP_STATUS_COMMON_OPENING, &act->adapter->status);
+
+	if (retval == ZFCP_ERP_FAILED)
+		ssleep(8);
 
 	return retval;
 }
 
-/*
- * function:    zfcp_erp_adapter_failed
- *
- * purpose:     sets the adapter and all underlying devices to ERP_FAILED
- *
- */
-void
-zfcp_erp_adapter_failed(struct zfcp_adapter *adapter, u8 id, void *ref)
+static int zfcp_erp_port_forced_strategy_close(struct zfcp_erp_action *act)
 {
-	zfcp_erp_modify_adapter_status(adapter, id, ref,
-				       ZFCP_STATUS_COMMON_ERP_FAILED, ZFCP_SET);
-	dev_err(&adapter->ccw_device->dev, "Adapter ERP failed.\n");
+	int retval;
+
+	retval = zfcp_fsf_close_physical_port(act);
+	if (retval == -ENOMEM)
+		return ZFCP_ERP_NOMEM;
+	act->step = ZFCP_ERP_STEP_PHYS_PORT_CLOSING;
+	if (retval)
+		return ZFCP_ERP_FAILED;
+
+	return ZFCP_ERP_CONTINUES;
 }
 
-/*
- * function:    zfcp_erp_port_failed
- *
- * purpose:     sets the port and all underlying devices to ERP_FAILED
- *
- */
-void
-zfcp_erp_port_failed(struct zfcp_port *port, u8 id, void *ref)
+static void zfcp_erp_port_strategy_clearstati(struct zfcp_port *port)
 {
-	zfcp_erp_modify_port_status(port, id, ref,
-				    ZFCP_STATUS_COMMON_ERP_FAILED, ZFCP_SET);
+	atomic_clear_mask(ZFCP_STATUS_COMMON_OPENING |
+			  ZFCP_STATUS_COMMON_CLOSING |
+			  ZFCP_STATUS_COMMON_ACCESS_DENIED |
+			  ZFCP_STATUS_PORT_DID_DID |
+			  ZFCP_STATUS_PORT_PHYS_CLOSING |
+			  ZFCP_STATUS_PORT_INVALID_WWPN,
+			  &port->status);
+}
 
-	if (atomic_test_mask(ZFCP_STATUS_PORT_WKA, &port->status))
-		dev_err(&port->adapter->ccw_device->dev,
-			"Port ERP failed for WKA port d_id=0x%06x.\n",
-			port->d_id);
-	else
-		dev_err(&port->adapter->ccw_device->dev,
-			"Port ERP failed for port wwpn=0x%016Lx.\n",
-			port->wwpn);
+static int zfcp_erp_port_forced_strategy(struct zfcp_erp_action *erp_action)
+{
+	struct zfcp_port *port = erp_action->port;
+	int status = atomic_read(&port->status);
+
+	switch (erp_action->step) {
+	case ZFCP_ERP_STEP_UNINITIALIZED:
+		zfcp_erp_port_strategy_clearstati(port);
+		if ((status & ZFCP_STATUS_PORT_PHYS_OPEN) &&
+		    (status & ZFCP_STATUS_COMMON_OPEN))
+			return zfcp_erp_port_forced_strategy_close(erp_action);
+		else
+			return ZFCP_ERP_FAILED;
+
+	case ZFCP_ERP_STEP_PHYS_PORT_CLOSING:
+		if (status & ZFCP_STATUS_PORT_PHYS_OPEN)
+			return ZFCP_ERP_SUCCEEDED;
+	}
+	return ZFCP_ERP_FAILED;
 }
 
-/*
- * function:    zfcp_erp_unit_failed
- *
- * purpose:     sets the unit to ERP_FAILED
- *
- */
-void
-zfcp_erp_unit_failed(struct zfcp_unit *unit, u8 id, void *ref)
+static int zfcp_erp_port_strategy_close(struct zfcp_erp_action *erp_action)
 {
-	zfcp_erp_modify_unit_status(unit, id, ref,
-				    ZFCP_STATUS_COMMON_ERP_FAILED, ZFCP_SET);
+	int retval;
 
-	dev_err(&unit->port->adapter->ccw_device->dev,
-		"Unit ERP failed for unit 0x%016Lx on port 0x%016Lx.\n",
-		unit->fcp_lun, unit->port->wwpn);
+	retval = zfcp_fsf_close_port(erp_action);
+	if (retval == -ENOMEM)
+		return ZFCP_ERP_NOMEM;
+	erp_action->step = ZFCP_ERP_STEP_PORT_CLOSING;
+	if (retval)
+		return ZFCP_ERP_FAILED;
+	return ZFCP_ERP_CONTINUES;
 }
 
-/*
- * function:	zfcp_erp_strategy_check_target
- *
- * purpose:	increments the erp action count on the device currently in
- *              recovery if the action failed or resets the count in case of
- *              success. If a maximum count is exceeded the device is marked
- *              as ERP_FAILED.
- *		The 'blocked' state of a target which has been recovered
- *              successfully is reset.
- *
- * returns:	ZFCP_ERP_CONTINUES	- action continues (not considered)
- *		ZFCP_ERP_SUCCEEDED	- action finished successfully
- *		ZFCP_ERP_EXIT		- action failed and will not continue
- */
-static int
-zfcp_erp_strategy_check_target(struct zfcp_erp_action *erp_action, int result)
+static int zfcp_erp_port_strategy_open_port(struct zfcp_erp_action *erp_action)
 {
-	struct zfcp_adapter *adapter = erp_action->adapter;
-	struct zfcp_port *port = erp_action->port;
-	struct zfcp_unit *unit = erp_action->unit;
+	int retval;
 
-	switch (erp_action->action) {
+	retval = zfcp_fsf_open_port(erp_action);
+	if (retval == -ENOMEM)
+		return ZFCP_ERP_NOMEM;
+	erp_action->step = ZFCP_ERP_STEP_PORT_OPENING;
+	if (retval)
+		return ZFCP_ERP_FAILED;
+	return ZFCP_ERP_CONTINUES;
+}
 
-	case ZFCP_ERP_ACTION_REOPEN_UNIT:
-		result = zfcp_erp_strategy_check_unit(unit, result);
-		break;
+static void zfcp_erp_port_strategy_open_ns_wake(struct zfcp_erp_action *ns_act)
+{
+	unsigned long flags;
+	struct zfcp_adapter *adapter = ns_act->adapter;
+	struct zfcp_erp_action *act, *tmp;
+	int status;
 
-	case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED:
-	case ZFCP_ERP_ACTION_REOPEN_PORT:
-		result = zfcp_erp_strategy_check_port(port, result);
-		break;
+	read_lock_irqsave(&adapter->erp_lock, flags);
+	list_for_each_entry_safe(act, tmp, &adapter->erp_running_head, list) {
+		if (act->step == ZFCP_ERP_STEP_NAMESERVER_OPEN) {
+			status = atomic_read(&adapter->nameserver_port->status);
+			if (status & ZFCP_STATUS_COMMON_ERP_FAILED)
+				zfcp_erp_port_failed(act->port, 27, NULL);
+			zfcp_erp_action_ready(act);
+		}
+	}
+	read_unlock_irqrestore(&adapter->erp_lock, flags);
+}
 
-	case ZFCP_ERP_ACTION_REOPEN_ADAPTER:
-		result = zfcp_erp_strategy_check_adapter(adapter, result);
-		break;
+static int zfcp_erp_port_strategy_open_nameserver(struct zfcp_erp_action *act)
+{
+	int retval;
+
+	switch (act->step) {
+	case ZFCP_ERP_STEP_UNINITIALIZED:
+	case ZFCP_ERP_STEP_PHYS_PORT_CLOSING:
+	case ZFCP_ERP_STEP_PORT_CLOSING:
+		return zfcp_erp_port_strategy_open_port(act);
+
+	case ZFCP_ERP_STEP_PORT_OPENING:
+		if (atomic_read(&act->port->status) & ZFCP_STATUS_COMMON_OPEN)
+			retval = ZFCP_ERP_SUCCEEDED;
+		else
+			retval = ZFCP_ERP_FAILED;
+		/* this is needed anyway  */
+		zfcp_erp_port_strategy_open_ns_wake(act);
+		return retval;
+
+	default:
+		return ZFCP_ERP_FAILED;
 	}
+}
 
-	return result;
+static int zfcp_erp_port_strategy_open_lookup(struct zfcp_erp_action *act)
+{
+	int retval;
+
+	retval = zfcp_fc_ns_gid_pn_request(act);
+	if (retval == -ENOMEM)
+		return ZFCP_ERP_NOMEM;
+	act->step = ZFCP_ERP_STEP_NAMESERVER_LOOKUP;
+	if (retval)
+		return ZFCP_ERP_FAILED;
+	return ZFCP_ERP_CONTINUES;
 }
 
-static int
-zfcp_erp_strategy_statechange(int action,
-			      u32 status,
-			      struct zfcp_adapter *adapter,
-			      struct zfcp_port *port,
-			      struct zfcp_unit *unit, int retval)
+static int zfcp_erp_open_ptp_port(struct zfcp_erp_action *act)
 {
-	switch (action) {
+	struct zfcp_adapter *adapter = act->adapter;
+	struct zfcp_port *port = act->port;
 
-	case ZFCP_ERP_ACTION_REOPEN_ADAPTER:
-		if (zfcp_erp_strategy_statechange_detected(&adapter->status,
-							   status)) {
-			zfcp_erp_adapter_reopen_internal(adapter,
-						ZFCP_STATUS_COMMON_ERP_FAILED,
-						67, NULL);
-			retval = ZFCP_ERP_EXIT;
+	if (port->wwpn != adapter->peer_wwpn) {
+		dev_err(&adapter->ccw_device->dev,
+			"Failed to open port 0x%016Lx, "
+			"Peer WWPN 0x%016Lx does not "
+			"match.\n", port->wwpn,
+			adapter->peer_wwpn);
+		zfcp_erp_port_failed(port, 25, NULL);
+		return ZFCP_ERP_FAILED;
+	}
+	port->d_id = adapter->peer_d_id;
+	atomic_set_mask(ZFCP_STATUS_PORT_DID_DID, &port->status);
+	return zfcp_erp_port_strategy_open_port(act);
+}
+
+static int zfcp_erp_port_strategy_open_common(struct zfcp_erp_action *act)
+{
+	struct zfcp_adapter *adapter = act->adapter;
+	struct zfcp_port *port = act->port;
+	struct zfcp_port *ns_port = adapter->nameserver_port;
+	int p_status = atomic_read(&port->status);
+
+	switch (act->step) {
+	case ZFCP_ERP_STEP_UNINITIALIZED:
+	case ZFCP_ERP_STEP_PHYS_PORT_CLOSING:
+	case ZFCP_ERP_STEP_PORT_CLOSING:
+		if (fc_host_port_type(adapter->scsi_host) == FC_PORTTYPE_PTP)
+			return zfcp_erp_open_ptp_port(act);
+		if (!ns_port) {
+			dev_err(&adapter->ccw_device->dev,
+				"Nameserver port unavailable.\n");
+			return ZFCP_ERP_FAILED;
 		}
-		break;
+		if (!(atomic_read(&ns_port->status) &
+		      ZFCP_STATUS_COMMON_UNBLOCKED)) {
+			/* nameserver port may live again */
+			atomic_set_mask(ZFCP_STATUS_COMMON_RUNNING,
+					&ns_port->status);
+			if (zfcp_erp_port_reopen(ns_port, 0, 77, act) >= 0) {
+				act->step = ZFCP_ERP_STEP_NAMESERVER_OPEN;
+				return ZFCP_ERP_CONTINUES;
+			}
+			return ZFCP_ERP_FAILED;
+		}
+		/* else nameserver port is already open, fall through */
+	case ZFCP_ERP_STEP_NAMESERVER_OPEN:
+		if (!(atomic_read(&ns_port->status) & ZFCP_STATUS_COMMON_OPEN))
+			return ZFCP_ERP_FAILED;
+		return zfcp_erp_port_strategy_open_lookup(act);
 
-	case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED:
-	case ZFCP_ERP_ACTION_REOPEN_PORT:
-		if (zfcp_erp_strategy_statechange_detected(&port->status,
-							   status)) {
-			zfcp_erp_port_reopen_internal(port,
-						ZFCP_STATUS_COMMON_ERP_FAILED,
-						68, NULL);
-			retval = ZFCP_ERP_EXIT;
+	case ZFCP_ERP_STEP_NAMESERVER_LOOKUP:
+		if (!(p_status & ZFCP_STATUS_PORT_DID_DID)) {
+			if (p_status & (ZFCP_STATUS_PORT_INVALID_WWPN)) {
+				zfcp_erp_port_failed(port, 26, NULL);
+				return ZFCP_ERP_EXIT;
+			}
+			return ZFCP_ERP_FAILED;
 		}
+		return zfcp_erp_port_strategy_open_port(act);
+
+	case ZFCP_ERP_STEP_PORT_OPENING:
+		/* D_ID might have changed during open */
+		if ((p_status & ZFCP_STATUS_COMMON_OPEN) &&
+		    (p_status & ZFCP_STATUS_PORT_DID_DID))
+			return ZFCP_ERP_SUCCEEDED;
+		/* fall through otherwise */
+	}
+	return ZFCP_ERP_FAILED;
+}
+
+static int zfcp_erp_port_strategy_open(struct zfcp_erp_action *act)
+{
+	if (atomic_read(&act->port->status) & (ZFCP_STATUS_PORT_WKA))
+		return zfcp_erp_port_strategy_open_nameserver(act);
+	return zfcp_erp_port_strategy_open_common(act);
+}
+
+static int zfcp_erp_port_strategy(struct zfcp_erp_action *erp_action)
+{
+	struct zfcp_port *port = erp_action->port;
+
+	switch (erp_action->step) {
+	case ZFCP_ERP_STEP_UNINITIALIZED:
+		zfcp_erp_port_strategy_clearstati(port);
+		if (atomic_read(&port->status) & ZFCP_STATUS_COMMON_OPEN)
+			return zfcp_erp_port_strategy_close(erp_action);
 		break;
 
-	case ZFCP_ERP_ACTION_REOPEN_UNIT:
-		if (zfcp_erp_strategy_statechange_detected(&unit->status,
-							   status)) {
-			zfcp_erp_unit_reopen_internal(unit,
-						ZFCP_STATUS_COMMON_ERP_FAILED,
-						69, NULL);
-			retval = ZFCP_ERP_EXIT;
-		}
+	case ZFCP_ERP_STEP_PORT_CLOSING:
+		if (atomic_read(&port->status) & ZFCP_STATUS_COMMON_OPEN)
+			return ZFCP_ERP_FAILED;
 		break;
 	}
+	if (erp_action->status & ZFCP_STATUS_ERP_CLOSE_ONLY)
+		return ZFCP_ERP_EXIT;
+	else
+		return zfcp_erp_port_strategy_open(erp_action);
 
-	return retval;
+	return ZFCP_ERP_FAILED;
+}
+
+static void zfcp_erp_unit_strategy_clearstati(struct zfcp_unit *unit)
+{
+	atomic_clear_mask(ZFCP_STATUS_COMMON_OPENING |
+			  ZFCP_STATUS_COMMON_CLOSING |
+			  ZFCP_STATUS_COMMON_ACCESS_DENIED |
+			  ZFCP_STATUS_UNIT_SHARED |
+			  ZFCP_STATUS_UNIT_READONLY,
+			  &unit->status);
+}
+
+static int zfcp_erp_unit_strategy_close(struct zfcp_erp_action *erp_action)
+{
+	int retval = zfcp_fsf_close_unit(erp_action);
+	if (retval == -ENOMEM)
+		return ZFCP_ERP_NOMEM;
+	erp_action->step = ZFCP_ERP_STEP_UNIT_CLOSING;
+	if (retval)
+		return ZFCP_ERP_FAILED;
+	return ZFCP_ERP_CONTINUES;
+}
+
+static int zfcp_erp_unit_strategy_open(struct zfcp_erp_action *erp_action)
+{
+	int retval = zfcp_fsf_open_unit(erp_action);
+	if (retval == -ENOMEM)
+		return ZFCP_ERP_NOMEM;
+	erp_action->step = ZFCP_ERP_STEP_UNIT_OPENING;
+	if (retval)
+		return  ZFCP_ERP_FAILED;
+	return ZFCP_ERP_CONTINUES;
 }
 
-static int
-zfcp_erp_strategy_statechange_detected(atomic_t * target_status, u32 erp_status)
+static int zfcp_erp_unit_strategy(struct zfcp_erp_action *erp_action)
 {
-	return
-	    /* take it online */
-	    (atomic_test_mask(ZFCP_STATUS_COMMON_RUNNING, target_status) &&
-	     (ZFCP_STATUS_ERP_CLOSE_ONLY & erp_status)) ||
-	    /* take it offline */
-	    (!atomic_test_mask(ZFCP_STATUS_COMMON_RUNNING, target_status) &&
-	     !(ZFCP_STATUS_ERP_CLOSE_ONLY & erp_status));
+	struct zfcp_unit *unit = erp_action->unit;
+
+	switch (erp_action->step) {
+	case ZFCP_ERP_STEP_UNINITIALIZED:
+		zfcp_erp_unit_strategy_clearstati(unit);
+		if (atomic_read(&unit->status) & ZFCP_STATUS_COMMON_OPEN)
+			return zfcp_erp_unit_strategy_close(erp_action);
+		/* already closed, fall through */
+	case ZFCP_ERP_STEP_UNIT_CLOSING:
+		if (atomic_read(&unit->status) & ZFCP_STATUS_COMMON_OPEN)
+			return ZFCP_ERP_FAILED;
+		if (erp_action->status & ZFCP_STATUS_ERP_CLOSE_ONLY)
+			return ZFCP_ERP_EXIT;
+		return zfcp_erp_unit_strategy_open(erp_action);
+
+	case ZFCP_ERP_STEP_UNIT_OPENING:
+		if (atomic_read(&unit->status) & ZFCP_STATUS_COMMON_OPEN)
+			return ZFCP_ERP_SUCCEEDED;
+	}
+	return ZFCP_ERP_FAILED;
 }
 
-static int
-zfcp_erp_strategy_check_unit(struct zfcp_unit *unit, int result)
+static int zfcp_erp_strategy_check_unit(struct zfcp_unit *unit, int result)
 {
 	switch (result) {
 	case ZFCP_ERP_SUCCEEDED :
@@ -1177,29 +1068,25 @@ zfcp_erp_strategy_check_unit(struct zfcp
 		if (atomic_read(&unit->erp_counter) > ZFCP_MAX_ERPS)
 			zfcp_erp_unit_failed(unit, 21, NULL);
 		break;
-	case ZFCP_ERP_EXIT :
-		/* nothing */
-		break;
 	}
 
-	if (atomic_test_mask(ZFCP_STATUS_COMMON_ERP_FAILED, &unit->status)) {
-		zfcp_erp_unit_block(unit, 0); /* for ZFCP_ERP_SUCCEEDED */
+	if (atomic_read(&unit->status) & ZFCP_STATUS_COMMON_ERP_FAILED) {
+		zfcp_erp_unit_block(unit, 0);
 		result = ZFCP_ERP_EXIT;
 	}
-
 	return result;
 }
 
-static int
-zfcp_erp_strategy_check_port(struct zfcp_port *port, int result)
+static int zfcp_erp_strategy_check_port(struct zfcp_port *port, int result)
 {
 	switch (result) {
 	case ZFCP_ERP_SUCCEEDED :
 		atomic_set(&port->erp_counter, 0);
 		zfcp_erp_port_unblock(port);
 		break;
+
 	case ZFCP_ERP_FAILED :
-		if (atomic_test_mask(ZFCP_STATUS_COMMON_NOESC, &port->status)) {
+		if (atomic_read(&port->status) & ZFCP_STATUS_COMMON_NOESC) {
 			zfcp_erp_port_block(port, 0);
 			result = ZFCP_ERP_EXIT;
 		}
@@ -1207,1402 +1094,588 @@ zfcp_erp_strategy_check_port(struct zfcp
 		if (atomic_read(&port->erp_counter) > ZFCP_MAX_ERPS)
 			zfcp_erp_port_failed(port, 22, NULL);
 		break;
-	case ZFCP_ERP_EXIT :
-		/* nothing */
-		break;
 	}
 
-	if (atomic_test_mask(ZFCP_STATUS_COMMON_ERP_FAILED, &port->status)) {
-		zfcp_erp_port_block(port, 0); /* for ZFCP_ERP_SUCCEEDED */
+	if (atomic_read(&port->status) & ZFCP_STATUS_COMMON_ERP_FAILED) {
+		zfcp_erp_port_block(port, 0);
 		result = ZFCP_ERP_EXIT;
 	}
-
 	return result;
 }
 
-static int
-zfcp_erp_strategy_check_adapter(struct zfcp_adapter *adapter, int result)
+static int zfcp_erp_strategy_check_adapter(struct zfcp_adapter *adapter,
+					   int result)
 {
 	switch (result) {
 	case ZFCP_ERP_SUCCEEDED :
 		atomic_set(&adapter->erp_counter, 0);
 		zfcp_erp_adapter_unblock(adapter);
 		break;
+
 	case ZFCP_ERP_FAILED :
 		atomic_inc(&adapter->erp_counter);
 		if (atomic_read(&adapter->erp_counter) > ZFCP_MAX_ERPS)
 			zfcp_erp_adapter_failed(adapter, 23, NULL);
 		break;
-	case ZFCP_ERP_EXIT :
-		/* nothing */
-		break;
 	}
 
-	if (atomic_test_mask(ZFCP_STATUS_COMMON_ERP_FAILED, &adapter->status)) {
-		zfcp_erp_adapter_block(adapter, 0); /* for ZFCP_ERP_SUCCEEDED */
+	if (atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_ERP_FAILED) {
+		zfcp_erp_adapter_block(adapter, 0);
 		result = ZFCP_ERP_EXIT;
 	}
-
 	return result;
 }
 
-struct zfcp_erp_add_work {
-	struct zfcp_unit  *unit;
-	struct work_struct work;
-};
-
-/**
- * zfcp_erp_scsi_scan
- * @data: pointer to a struct zfcp_erp_add_work
- *
- * Registers a logical unit with the SCSI stack.
- */
-static void zfcp_erp_scsi_scan(struct work_struct *work)
+static int zfcp_erp_strategy_check_target(struct zfcp_erp_action *erp_action,
+					  int result)
 {
-	struct zfcp_erp_add_work *p =
-		container_of(work, struct zfcp_erp_add_work, work);
-	struct zfcp_unit *unit = p->unit;
-	struct fc_rport *rport = unit->port->rport;
-	scsi_scan_target(&rport->dev, 0, rport->scsi_target_id,
-			 unit->scsi_lun, 0);
-	atomic_clear_mask(ZFCP_STATUS_UNIT_SCSI_WORK_PENDING, &unit->status);
-	zfcp_unit_put(unit);
-	kfree(p);
-}
+	struct zfcp_adapter *adapter = erp_action->adapter;
+	struct zfcp_port *port = erp_action->port;
+	struct zfcp_unit *unit = erp_action->unit;
 
-/**
- * zfcp_erp_schedule_work
- * @unit: pointer to unit which should be registered with SCSI stack
- *
- * Schedules work which registers a unit with the SCSI stack
- */
-static void
-zfcp_erp_schedule_work(struct zfcp_unit *unit)
-{
-	struct zfcp_erp_add_work *p;
+	switch (erp_action->action) {
 
-	p = kzalloc(sizeof(*p), GFP_KERNEL);
-	if (!p) {
-		dev_err(&unit->port->adapter->ccw_device->dev,
-			"Out of resources. Could not register unit 0x%016Lx "
-			"on port 0x%016Lx with SCSI stack.\n",
-			unit->fcp_lun, unit->port->wwpn);
-		return;
-	}
+	case ZFCP_ERP_ACTION_REOPEN_UNIT:
+		result = zfcp_erp_strategy_check_unit(unit, result);
+		break;
 
-	zfcp_unit_get(unit);
-	atomic_set_mask(ZFCP_STATUS_UNIT_SCSI_WORK_PENDING, &unit->status);
-	INIT_WORK(&p->work, zfcp_erp_scsi_scan);
-	p->unit = unit;
-	schedule_work(&p->work);
+	case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED:
+	case ZFCP_ERP_ACTION_REOPEN_PORT:
+		result = zfcp_erp_strategy_check_port(port, result);
+		break;
+
+	case ZFCP_ERP_ACTION_REOPEN_ADAPTER:
+		result = zfcp_erp_strategy_check_adapter(adapter, result);
+		break;
+	}
+	return result;
 }
 
-/*
- * function:
- *
- * purpose:	remaining things in good cases,
- *		escalation in bad cases
- *
- * returns:
- */
-static int
-zfcp_erp_strategy_followup_actions(int action,
-				   struct zfcp_adapter *adapter,
-				   struct zfcp_port *port,
-				   struct zfcp_unit *unit, int status)
+static int zfcp_erp_strat_change_det(atomic_t *target_status, u32 erp_status)
 {
-	/* initiate follow-up actions depending on success of finished action */
-	switch (action) {
+	int status = atomic_read(target_status);
+
+	if ((status & ZFCP_STATUS_COMMON_RUNNING) &&
+	    (erp_status & ZFCP_STATUS_ERP_CLOSE_ONLY))
+		return 1; /* take it online */
+
+	if (!(status & ZFCP_STATUS_COMMON_RUNNING) &&
+	    !(erp_status & ZFCP_STATUS_ERP_CLOSE_ONLY))
+		return 1; /* take it offline */
+
+	return 0;
+}
 
+static int zfcp_erp_strategy_statechange(struct zfcp_erp_action *act, int ret)
+{
+	int action = act->action;
+	struct zfcp_adapter *adapter = act->adapter;
+	struct zfcp_port *port = act->port;
+	struct zfcp_unit *unit = act->unit;
+	u32 erp_status = act->status;
+
+	switch (action) {
 	case ZFCP_ERP_ACTION_REOPEN_ADAPTER:
-		if (status == ZFCP_ERP_SUCCEEDED)
-			zfcp_erp_port_reopen_all_internal(adapter, 0, 70, NULL);
-		else
-			zfcp_erp_adapter_reopen_internal(adapter, 0, 71, NULL);
+		if (zfcp_erp_strat_change_det(&adapter->status, erp_status)) {
+			_zfcp_erp_adapter_reopen(adapter,
+						 ZFCP_STATUS_COMMON_ERP_FAILED,
+						 67, NULL);
+			return ZFCP_ERP_EXIT;
+		}
 		break;
 
 	case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED:
-		if (status == ZFCP_ERP_SUCCEEDED)
-			zfcp_erp_port_reopen_internal(port, 0, 72, NULL);
-		else
-			zfcp_erp_adapter_reopen_internal(adapter, 0, 73, NULL);
-		break;
-
 	case ZFCP_ERP_ACTION_REOPEN_PORT:
-		if (status == ZFCP_ERP_SUCCEEDED)
-			zfcp_erp_unit_reopen_all_internal(port, 0, 74, NULL);
-		else
-			zfcp_erp_port_forced_reopen_internal(port, 0, 75, NULL);
+		if (zfcp_erp_strat_change_det(&port->status, erp_status)) {
+			_zfcp_erp_port_reopen(port,
+					      ZFCP_STATUS_COMMON_ERP_FAILED,
+					      68, NULL);
+			return ZFCP_ERP_EXIT;
+		}
 		break;
 
 	case ZFCP_ERP_ACTION_REOPEN_UNIT:
-		/* Nothing to do if status == ZFCP_ERP_SUCCEEDED */
-		if (status != ZFCP_ERP_SUCCEEDED)
-			zfcp_erp_port_reopen_internal(unit->port, 0, 76, NULL);
+		if (zfcp_erp_strat_change_det(&unit->status, erp_status)) {
+			_zfcp_erp_unit_reopen(unit,
+					      ZFCP_STATUS_COMMON_ERP_FAILED,
+					      69, NULL);
+			return ZFCP_ERP_EXIT;
+		}
 		break;
 	}
-
-	return 0;
+	return ret;
 }
 
-static int
-zfcp_erp_strategy_check_queues(struct zfcp_adapter *adapter)
+static void zfcp_erp_action_dequeue(struct zfcp_erp_action *erp_action)
 {
-	unsigned long flags;
+	struct zfcp_adapter *adapter = erp_action->adapter;
 
-	read_lock_irqsave(&zfcp_data.config_lock, flags);
-	read_lock(&adapter->erp_lock);
-	if (list_empty(&adapter->erp_ready_head) &&
-	    list_empty(&adapter->erp_running_head)) {
-			atomic_clear_mask(ZFCP_STATUS_ADAPTER_ERP_PENDING,
-					  &adapter->status);
-			wake_up(&adapter->erp_done_wqh);
+	adapter->erp_total_count--;
+	if (erp_action->status & ZFCP_STATUS_ERP_LOWMEM) {
+		adapter->erp_low_mem_count--;
+		erp_action->status &= ~ZFCP_STATUS_ERP_LOWMEM;
 	}
-	read_unlock(&adapter->erp_lock);
-	read_unlock_irqrestore(&zfcp_data.config_lock, flags);
 
-	return 0;
-}
+	list_del(&erp_action->list);
+	zfcp_rec_dbf_event_action(144, erp_action);
 
-/**
- * zfcp_erp_wait - wait for completion of error recovery on an adapter
- * @adapter: adapter for which to wait for completion of its error recovery
- * Return: 0
- */
-int
-zfcp_erp_wait(struct zfcp_adapter *adapter)
-{
-	int retval = 0;
+	switch (erp_action->action) {
+	case ZFCP_ERP_ACTION_REOPEN_UNIT:
+		atomic_clear_mask(ZFCP_STATUS_COMMON_ERP_INUSE,
+				  &erp_action->unit->status);
+		break;
 
-	wait_event(adapter->erp_done_wqh,
-		   !atomic_test_mask(ZFCP_STATUS_ADAPTER_ERP_PENDING,
-				     &adapter->status));
+	case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED:
+	case ZFCP_ERP_ACTION_REOPEN_PORT:
+		atomic_clear_mask(ZFCP_STATUS_COMMON_ERP_INUSE,
+				  &erp_action->port->status);
+		break;
 
-	return retval;
+	case ZFCP_ERP_ACTION_REOPEN_ADAPTER:
+		atomic_clear_mask(ZFCP_STATUS_COMMON_ERP_INUSE,
+				  &erp_action->adapter->status);
+		break;
+	}
 }
 
-void zfcp_erp_modify_adapter_status(struct zfcp_adapter *adapter, u8 id,
-				    void *ref, u32 mask, int set_or_clear)
-{
-	struct zfcp_port *port;
-	u32 changed, common_mask = mask & ZFCP_COMMON_FLAGS;
-
-	if (set_or_clear == ZFCP_SET) {
-		changed = atomic_test_and_set_mask(mask, &adapter->status);
-	} else {
-		changed = atomic_test_and_clear_mask(mask, &adapter->status);
-		if (mask & ZFCP_STATUS_COMMON_ERP_FAILED)
-			atomic_set(&adapter->erp_counter, 0);
-	}
-	if (changed)
-		zfcp_rec_dbf_event_adapter(id, ref, adapter);
+struct zfcp_erp_add_work {
+	struct zfcp_unit  *unit;
+	struct work_struct work;
+};
 
-	/* Deal with all underlying devices, only pass common_mask */
-	if (common_mask)
-		list_for_each_entry(port, &adapter->port_list_head, list)
-			zfcp_erp_modify_port_status(port, id, ref, common_mask,
-						    set_or_clear);
+static void zfcp_erp_scsi_scan(struct work_struct *work)
+{
+	struct zfcp_erp_add_work *p =
+		container_of(work, struct zfcp_erp_add_work, work);
+	struct zfcp_unit *unit = p->unit;
+	struct fc_rport *rport = unit->port->rport;
+	scsi_scan_target(&rport->dev, 0, rport->scsi_target_id,
+			 unit->scsi_lun, 0);
+	atomic_clear_mask(ZFCP_STATUS_UNIT_SCSI_WORK_PENDING, &unit->status);
+	zfcp_unit_put(unit);
+	kfree(p);
 }
 
-/*
- * function:	zfcp_erp_modify_port_status
- *
- * purpose:	sets the port and all underlying devices to ERP_FAILED
- *
- */
-void zfcp_erp_modify_port_status(struct zfcp_port *port, u8 id, void *ref,
-				 u32 mask, int set_or_clear)
+static void zfcp_erp_schedule_work(struct zfcp_unit *unit)
 {
-	struct zfcp_unit *unit;
-	u32 changed, common_mask = mask & ZFCP_COMMON_FLAGS;
+	struct zfcp_erp_add_work *p;
 
-	if (set_or_clear == ZFCP_SET) {
-		changed = atomic_test_and_set_mask(mask, &port->status);
-	} else {
-		changed = atomic_test_and_clear_mask(mask, &port->status);
-		if (mask & ZFCP_STATUS_COMMON_ERP_FAILED)
-			atomic_set(&port->erp_counter, 0);
+	p = kzalloc(sizeof(*p), GFP_KERNEL);
+	if (!p) {
+		dev_err(&unit->port->adapter->ccw_device->dev,
+			"Out of resources. Could not register unit "
+			"0x%016Lx on port 0x%016Lx with SCSI stack.\n",
+			unit->fcp_lun, unit->port->wwpn);
+		return;
 	}
-	if (changed)
-		zfcp_rec_dbf_event_port(id, ref, port);
 
-	/* Modify status of all underlying devices, only pass common mask */
-	if (common_mask)
-		list_for_each_entry(unit, &port->unit_list_head, list)
-			zfcp_erp_modify_unit_status(unit, id, ref, common_mask,
-						    set_or_clear);
+	zfcp_unit_get(unit);
+	atomic_set_mask(ZFCP_STATUS_UNIT_SCSI_WORK_PENDING, &unit->status);
+	INIT_WORK(&p->work, zfcp_erp_scsi_scan);
+	p->unit = unit;
+	schedule_work(&p->work);
 }
 
-/*
- * function:	zfcp_erp_modify_unit_status
- *
- * purpose:	sets the unit to ERP_FAILED
- *
- */
-void zfcp_erp_modify_unit_status(struct zfcp_unit *unit, u8 id, void *ref,
-				 u32 mask, int set_or_clear)
+static void zfcp_erp_rport_register(struct zfcp_port *port)
 {
-	u32 changed;
-
-	if (set_or_clear == ZFCP_SET) {
-		changed = atomic_test_and_set_mask(mask, &unit->status);
-	} else {
-		changed = atomic_test_and_clear_mask(mask, &unit->status);
-		if (mask & ZFCP_STATUS_COMMON_ERP_FAILED) {
-			atomic_set(&unit->erp_counter, 0);
-		}
+	struct fc_rport_identifiers ids;
+	ids.node_name = port->wwnn;
+	ids.port_name = port->wwpn;
+	ids.port_id = port->d_id;
+	ids.roles = FC_RPORT_ROLE_FCP_TARGET;
+	port->rport = fc_remote_port_add(port->adapter->scsi_host, 0, &ids);
+	if (!port->rport) {
+		dev_err(&port->adapter->ccw_device->dev,
+			"Failed registration of rport "
+			"0x%016Lx.\n", port->wwpn);
+		return;
 	}
-	if (changed)
-		zfcp_rec_dbf_event_unit(id, ref, unit);
-}
-
-/*
- * function:
- *
- * purpose:	Wrappper for zfcp_erp_port_reopen_all_internal
- *              used to ensure the correct locking
- *
- * returns:	0	- initiated action successfully
- *		<0	- failed to initiate action
- */
-int zfcp_erp_port_reopen_all(struct zfcp_adapter *adapter, int clear_mask,
-			     u8 id, void *ref)
-{
-	int retval;
-	unsigned long flags;
-
-	read_lock_irqsave(&zfcp_data.config_lock, flags);
-	write_lock(&adapter->erp_lock);
-	retval = zfcp_erp_port_reopen_all_internal(adapter, clear_mask, id,
-						   ref);
-	write_unlock(&adapter->erp_lock);
-	read_unlock_irqrestore(&zfcp_data.config_lock, flags);
 
-	return retval;
+	scsi_target_unblock(&port->rport->dev);
+	port->rport->maxframe_size = port->maxframe_size;
+	port->rport->supported_classes = port->supported_classes;
 }
 
-static int zfcp_erp_port_reopen_all_internal(struct zfcp_adapter *adapter,
-					     int clear_mask, u8 id, void *ref)
+static void zfcp_erp_rports_del(struct zfcp_adapter *adapter)
 {
-	int retval = 0;
 	struct zfcp_port *port;
-
 	list_for_each_entry(port, &adapter->port_list_head, list)
-		if (!atomic_test_mask(ZFCP_STATUS_PORT_WKA, &port->status))
-			zfcp_erp_port_reopen_internal(port, clear_mask, id,
-						      ref);
-
-	return retval;
-}
-
-/*
- * function:
- *
- * purpose:
- *
- * returns:	FIXME
- */
-static int zfcp_erp_unit_reopen_all_internal(struct zfcp_port *port,
-					     int clear_mask, u8 id, void *ref)
-{
-	int retval = 0;
-	struct zfcp_unit *unit;
-
-	list_for_each_entry(unit, &port->unit_list_head, list)
-		zfcp_erp_unit_reopen_internal(unit, clear_mask, id, ref);
-
-	return retval;
+		if (port->rport && !(atomic_read(&port->status) &
+					ZFCP_STATUS_PORT_WKA)) {
+			fc_remote_port_delete(port->rport);
+			port->rport = NULL;
+		}
 }
 
-/*
- * function:
- *
- * purpose:	this routine executes the 'Reopen Adapter' action
- *		(the entire action is processed synchronously, since
- *		there are no actions which might be run concurrently
- *		per definition)
- *
- * returns:	ZFCP_ERP_SUCCEEDED	- action finished successfully
- *		ZFCP_ERP_FAILED		- action finished unsuccessfully
- */
-static int
-zfcp_erp_adapter_strategy(struct zfcp_erp_action *erp_action)
+static void zfcp_erp_action_cleanup(struct zfcp_erp_action *act, int result)
 {
-	int retval;
+	struct zfcp_adapter *adapter = act->adapter;
+	struct zfcp_port *port = act->port;
+	struct zfcp_unit *unit = act->unit;
 
-	retval = zfcp_erp_adapter_strategy_close(erp_action);
-	if (erp_action->status & ZFCP_STATUS_ERP_CLOSE_ONLY)
-		retval = ZFCP_ERP_EXIT;
-	else
-		retval = zfcp_erp_adapter_strategy_open(erp_action);
+	switch (act->action) {
+	case ZFCP_ERP_ACTION_REOPEN_UNIT:
+		if ((result == ZFCP_ERP_SUCCEEDED) &&
+		    !unit->device && port->rport) {
+			atomic_set_mask(ZFCP_STATUS_UNIT_REGISTERED,
+					&unit->status);
+			if (!(atomic_read(&unit->status) &
+			      ZFCP_STATUS_UNIT_SCSI_WORK_PENDING))
+				zfcp_erp_schedule_work(unit);
+		}
+		zfcp_unit_put(unit);
+		break;
 
-	if (retval == ZFCP_ERP_FAILED)
-		ssleep(ZFCP_TYPE2_RECOVERY_TIME);
+	case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED:
+	case ZFCP_ERP_ACTION_REOPEN_PORT:
+		if (atomic_read(&port->status) & ZFCP_STATUS_PORT_NO_WWPN) {
+			zfcp_port_put(port);
+			return;
+		}
+		if ((result == ZFCP_ERP_SUCCEEDED) && !port->rport)
+			zfcp_erp_rport_register(port);
+		if ((result != ZFCP_ERP_SUCCEEDED) && port->rport) {
+			fc_remote_port_delete(port->rport);
+			port->rport = NULL;
+		}
+		zfcp_port_put(port);
+		break;
 
-	return retval;
+	case ZFCP_ERP_ACTION_REOPEN_ADAPTER:
+		if (result != ZFCP_ERP_SUCCEEDED)
+			zfcp_erp_rports_del(adapter);
+		zfcp_adapter_put(adapter);
+		break;
+	}
 }
 
-/*
- * function:
- *
- * purpose:
- *
- * returns:	ZFCP_ERP_SUCCEEDED      - action finished successfully
- *              ZFCP_ERP_FAILED         - action finished unsuccessfully
- */
-static int
-zfcp_erp_adapter_strategy_close(struct zfcp_erp_action *erp_action)
+static int zfcp_erp_strategy_do_action(struct zfcp_erp_action *erp_action)
 {
-	int retval;
-
-	atomic_set_mask(ZFCP_STATUS_COMMON_CLOSING,
-			&erp_action->adapter->status);
-	retval = zfcp_erp_adapter_strategy_generic(erp_action, 1);
-	atomic_clear_mask(ZFCP_STATUS_COMMON_CLOSING,
-			  &erp_action->adapter->status);
-
-	return retval;
+	switch (erp_action->action) {
+	case ZFCP_ERP_ACTION_REOPEN_ADAPTER:
+		return zfcp_erp_adapter_strategy(erp_action);
+	case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED:
+		return zfcp_erp_port_forced_strategy(erp_action);
+	case ZFCP_ERP_ACTION_REOPEN_PORT:
+		return zfcp_erp_port_strategy(erp_action);
+	case ZFCP_ERP_ACTION_REOPEN_UNIT:
+		return zfcp_erp_unit_strategy(erp_action);
+	}
+	return ZFCP_ERP_FAILED;
 }
 
-/*
- * function:
- *
- * purpose:
- *
- * returns:	ZFCP_ERP_SUCCEEDED      - action finished successfully
- *              ZFCP_ERP_FAILED         - action finished unsuccessfully
- */
-static int
-zfcp_erp_adapter_strategy_open(struct zfcp_erp_action *erp_action)
+static int zfcp_erp_strategy(struct zfcp_erp_action *erp_action)
 {
 	int retval;
+	struct zfcp_adapter *adapter = erp_action->adapter;
+	unsigned long flags;
 
-	atomic_set_mask(ZFCP_STATUS_COMMON_OPENING,
-			&erp_action->adapter->status);
-	retval = zfcp_erp_adapter_strategy_generic(erp_action, 0);
-	atomic_clear_mask(ZFCP_STATUS_COMMON_OPENING,
-			  &erp_action->adapter->status);
+	read_lock_irqsave(&zfcp_data.config_lock, flags);
+	write_lock(&adapter->erp_lock);
 
-	return retval;
-}
+	zfcp_erp_strategy_check_fsfreq(erp_action);
 
-/*
- * function:    zfcp_register_adapter
- *
- * purpose:	allocate the irq associated with this devno and register
- *		the FSF adapter with the SCSI stack
- *
- * returns:
- */
-static int
-zfcp_erp_adapter_strategy_generic(struct zfcp_erp_action *erp_action, int close)
-{
-	int retval = ZFCP_ERP_SUCCEEDED;
+	if (erp_action->status & ZFCP_STATUS_ERP_DISMISSED) {
+		zfcp_erp_action_dequeue(erp_action);
+		retval = ZFCP_ERP_DISMISSED;
+		goto unlock;
+	}
 
-	if (close)
-		goto close_only;
+	zfcp_erp_action_to_running(erp_action);
 
-	retval = zfcp_erp_adapter_strategy_open_qdio(erp_action);
-	if (retval != ZFCP_ERP_SUCCEEDED)
-		goto failed_qdio;
+	/* no lock to allow for blocking operations */
+	write_unlock(&adapter->erp_lock);
+	read_unlock_irqrestore(&zfcp_data.config_lock, flags);
+	retval = zfcp_erp_strategy_do_action(erp_action);
+	read_lock_irqsave(&zfcp_data.config_lock, flags);
+	write_lock(&adapter->erp_lock);
 
-	retval = zfcp_erp_adapter_strategy_open_fsf(erp_action);
-	if (retval != ZFCP_ERP_SUCCEEDED)
-		goto failed_openfcp;
+	if (erp_action->status & ZFCP_STATUS_ERP_DISMISSED)
+		retval = ZFCP_ERP_CONTINUES;
 
-	atomic_set_mask(ZFCP_STATUS_COMMON_OPEN, &erp_action->adapter->status);
-	schedule_work(&erp_action->adapter->scan_work);
-	goto out;
-
- close_only:
-	atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN,
-			  &erp_action->adapter->status);
-
- failed_openfcp:
-	zfcp_close_fsf(erp_action->adapter);
- failed_qdio:
-	atomic_clear_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK |
-			  ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED |
-			  ZFCP_STATUS_ADAPTER_XPORT_OK,
-			  &erp_action->adapter->status);
- out:
-	return retval;
-}
-
-/*
- * function:    zfcp_qdio_init
- *
- * purpose:	setup QDIO operation for specified adapter
- *
- * returns:	0 - successful setup
- *		!0 - failed setup
- */
-static int
-zfcp_erp_adapter_strategy_open_qdio(struct zfcp_erp_action *erp_action)
-{
-	struct zfcp_adapter *adapter = erp_action->adapter;
-
-	if (zfcp_qdio_open(adapter))
-		return ZFCP_ERP_FAILED;
-
-	/* initialize waitqueue used to wait for free SBALs in requests queue */
-	init_waitqueue_head(&adapter->request_wq);
-
-	/* ok, we did it - skip all cleanups for different failures */
-	atomic_set_mask(ZFCP_STATUS_ADAPTER_QDIOUP, &adapter->status);
-	return ZFCP_ERP_SUCCEEDED;
-}
-
-
-static int
-zfcp_erp_adapter_strategy_open_fsf(struct zfcp_erp_action *erp_action)
-{
-	int retval;
-
-	retval = zfcp_erp_adapter_strategy_open_fsf_xconfig(erp_action);
-	if (retval == ZFCP_ERP_FAILED)
-		return ZFCP_ERP_FAILED;
-
-	retval = zfcp_erp_adapter_strategy_open_fsf_xport(erp_action);
-	if (retval == ZFCP_ERP_FAILED)
-		return ZFCP_ERP_FAILED;
-
-	return zfcp_erp_adapter_strategy_open_fsf_statusread(erp_action);
-}
-
-static void zfcp_erp_open_ptp_port(struct zfcp_adapter *adapter)
-{
-	struct zfcp_port *port;
-	port = zfcp_port_enqueue(adapter, adapter->peer_wwpn, 0,
-				 adapter->peer_d_id);
-	if (IS_ERR(port)) /* error or port already attached */
-		return;
-	zfcp_erp_port_reopen_internal(port, 0, 150, NULL);
-}
-
-static int
-zfcp_erp_adapter_strategy_open_fsf_xconfig(struct zfcp_erp_action *erp_action)
-{
-	int retries;
-	int sleep = ZFCP_EXCHANGE_CONFIG_DATA_FIRST_SLEEP;
-	struct zfcp_adapter *adapter = erp_action->adapter;
-
-	atomic_clear_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK, &adapter->status);
-
-	for (retries = ZFCP_EXCHANGE_CONFIG_DATA_RETRIES; retries; retries--) {
-		atomic_clear_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT,
-				  &adapter->status);
-		write_lock_irq(&adapter->erp_lock);
-		zfcp_erp_action_to_running(erp_action);
-		write_unlock_irq(&adapter->erp_lock);
-		if (zfcp_fsf_exchange_config_data(erp_action)) {
-			atomic_clear_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT,
-					  &adapter->status);
-			return ZFCP_ERP_FAILED;
-		}
-
-		/*
-		 * Why this works:
-		 * Both the normal completion handler as well as the timeout
-		 * handler will do an 'up' when the 'exchange config data'
-		 * request completes or times out. Thus, the signal to go on
-		 * won't be lost utilizing this semaphore.
-		 * Furthermore, this 'adapter_reopen' action is
-		 * guaranteed to be the only action being there (highest action
-		 * which prevents other actions from being created).
-		 * Resulting from that, the wake signal recognized here
-		 * _must_ be the one belonging to the 'exchange config
-		 * data' request.
-		 */
-		zfcp_rec_dbf_event_thread_lock(6, adapter);
-		down(&adapter->erp_ready_sem);
-		zfcp_rec_dbf_event_thread_lock(7, adapter);
-		if (erp_action->status & ZFCP_STATUS_ERP_TIMEDOUT)
-			break;
-
-		if (!atomic_test_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT,
-				     &adapter->status))
-			break;
-
-		/* sleep a little bit before retry */
-		ssleep(sleep);
-		sleep *= 2;
-	}
-
-	atomic_clear_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT,
-			  &adapter->status);
-
-	if (!atomic_test_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
-			      &adapter->status))
-		return ZFCP_ERP_FAILED;
-
-	if (fc_host_port_type(adapter->scsi_host) == FC_PORTTYPE_PTP)
-		zfcp_erp_open_ptp_port(adapter);
-
-	return ZFCP_ERP_SUCCEEDED;
-}
-
-static int
-zfcp_erp_adapter_strategy_open_fsf_xport(struct zfcp_erp_action *erp_action)
-{
-	int ret;
-	struct zfcp_adapter *adapter;
-
-	adapter = erp_action->adapter;
-	atomic_clear_mask(ZFCP_STATUS_ADAPTER_XPORT_OK, &adapter->status);
-
-	write_lock_irq(&adapter->erp_lock);
-	zfcp_erp_action_to_running(erp_action);
-	write_unlock_irq(&adapter->erp_lock);
-
-	ret = zfcp_fsf_exchange_port_data(erp_action);
-	if (ret == -EOPNOTSUPP) {
-		return ZFCP_ERP_SUCCEEDED;
-	} else if (ret) {
-		return ZFCP_ERP_FAILED;
-	}
-
-	ret = ZFCP_ERP_SUCCEEDED;
-	zfcp_rec_dbf_event_thread_lock(8, adapter);
-	down(&adapter->erp_ready_sem);
-	zfcp_rec_dbf_event_thread_lock(9, adapter);
-	if (erp_action->status & ZFCP_STATUS_ERP_TIMEDOUT)
-		ret = ZFCP_ERP_FAILED;
-
-	return ret;
-}
-
-static int
-zfcp_erp_adapter_strategy_open_fsf_statusread(struct zfcp_erp_action
-					      *erp_action)
-{
-	struct zfcp_adapter *adapter = erp_action->adapter;
-
-	atomic_set(&adapter->stat_miss, 16);
-	return zfcp_status_read_refill(adapter);
-}
-
-/*
- * function:
- *
- * purpose:	this routine executes the 'Reopen Physical Port' action
- *
- * returns:	ZFCP_ERP_CONTINUES	- action continues (asynchronously)
- *		ZFCP_ERP_SUCCEEDED	- action finished successfully
- *		ZFCP_ERP_FAILED		- action finished unsuccessfully
- */
-static int
-zfcp_erp_port_forced_strategy(struct zfcp_erp_action *erp_action)
-{
-	int retval = ZFCP_ERP_FAILED;
-	struct zfcp_port *port = erp_action->port;
-
-	switch (erp_action->step) {
-
-		/*
-		 * FIXME:
-		 * the ULP spec. begs for waiting for oustanding commands
-		 */
-	case ZFCP_ERP_STEP_UNINITIALIZED:
-		zfcp_erp_port_strategy_clearstati(port);
-		/*
-		 * it would be sufficient to test only the normal open flag
-		 * since the phys. open flag cannot be set if the normal
-		 * open flag is unset - however, this is for readabilty ...
-		 */
-		if (atomic_test_mask((ZFCP_STATUS_PORT_PHYS_OPEN |
-				      ZFCP_STATUS_COMMON_OPEN),
-			             &port->status)) {
-			retval =
-			    zfcp_erp_port_forced_strategy_close(erp_action);
-		} else
-			retval = ZFCP_ERP_FAILED;
-		break;
-
-	case ZFCP_ERP_STEP_PHYS_PORT_CLOSING:
-		if (atomic_test_mask(ZFCP_STATUS_PORT_PHYS_OPEN,
-				     &port->status)) {
-			retval = ZFCP_ERP_FAILED;
-		} else
-			retval = ZFCP_ERP_SUCCEEDED;
-		break;
-	}
-
-	return retval;
-}
-
-/*
- * function:
- *
- * purpose:	this routine executes the 'Reopen Port' action
- *
- * returns:	ZFCP_ERP_CONTINUES	- action continues (asynchronously)
- *		ZFCP_ERP_SUCCEEDED	- action finished successfully
- *		ZFCP_ERP_FAILED		- action finished unsuccessfully
- */
-static int
-zfcp_erp_port_strategy(struct zfcp_erp_action *erp_action)
-{
-	int retval = ZFCP_ERP_FAILED;
-	struct zfcp_port *port = erp_action->port;
-
-	switch (erp_action->step) {
-
-		/*
-		 * FIXME:
-		 * the ULP spec. begs for waiting for oustanding commands
-		 */
-	case ZFCP_ERP_STEP_UNINITIALIZED:
-		zfcp_erp_port_strategy_clearstati(port);
-		if (atomic_test_mask(ZFCP_STATUS_COMMON_OPEN, &port->status)) {
-			retval = zfcp_erp_port_strategy_close(erp_action);
-			goto out;
-		}		/* else it's already closed, open it */
-		break;
-
-	case ZFCP_ERP_STEP_PORT_CLOSING:
-		if (atomic_test_mask(ZFCP_STATUS_COMMON_OPEN, &port->status)) {
-			retval = ZFCP_ERP_FAILED;
-			goto out;
-		}		/* else it's closed now, open it */
-		break;
-	}
-	if (erp_action->status & ZFCP_STATUS_ERP_CLOSE_ONLY)
-		retval = ZFCP_ERP_EXIT;
-	else
-		retval = zfcp_erp_port_strategy_open(erp_action);
-
- out:
-	return retval;
-}
-
-static int
-zfcp_erp_port_strategy_open(struct zfcp_erp_action *erp_action)
-{
-	int retval;
-
-	if (atomic_test_mask(ZFCP_STATUS_PORT_WKA,
-			     &erp_action->port->status))
-		retval = zfcp_erp_port_strategy_open_nameserver(erp_action);
-	else
-		retval = zfcp_erp_port_strategy_open_common(erp_action);
-
-	return retval;
-}
-
-static int
-zfcp_erp_port_strategy_open_common(struct zfcp_erp_action *erp_action)
-{
-	int retval = 0;
-	struct zfcp_adapter *adapter = erp_action->adapter;
-	struct zfcp_port *port = erp_action->port;
-
-	switch (erp_action->step) {
-
-	case ZFCP_ERP_STEP_UNINITIALIZED:
-	case ZFCP_ERP_STEP_PHYS_PORT_CLOSING:
-	case ZFCP_ERP_STEP_PORT_CLOSING:
-		if (fc_host_port_type(adapter->scsi_host) == FC_PORTTYPE_PTP) {
-			if (port->wwpn != adapter->peer_wwpn) {
-				dev_err(&adapter->ccw_device->dev,
-					"Failed to open port 0x%016Lx, "
-					"Peer WWPN 0x%016Lx does not match.\n",
-					port->wwpn, adapter->peer_wwpn);
-				zfcp_erp_port_failed(port, 25, NULL);
-				retval = ZFCP_ERP_FAILED;
-				break;
-			}
-			port->d_id = adapter->peer_d_id;
-			atomic_set_mask(ZFCP_STATUS_PORT_DID_DID, &port->status);
-			retval = zfcp_erp_port_strategy_open_port(erp_action);
-			break;
-		}
-
-		if (!adapter->nameserver_port) {
-			dev_err(&adapter->ccw_device->dev,
-				"Nameserver port unavailable.\n");
-			retval = ZFCP_ERP_FAILED;
-			break;
-		}
-		if (!atomic_test_mask(ZFCP_STATUS_COMMON_UNBLOCKED,
-				      &adapter->nameserver_port->status)) {
-			/* nameserver port may live again */
-			atomic_set_mask(ZFCP_STATUS_COMMON_RUNNING,
-					&adapter->nameserver_port->status);
-			if (zfcp_erp_port_reopen(adapter->nameserver_port, 0,
-						 77, erp_action) >= 0) {
-				erp_action->step =
-					ZFCP_ERP_STEP_NAMESERVER_OPEN;
-				retval = ZFCP_ERP_CONTINUES;
-			} else
-				retval = ZFCP_ERP_FAILED;
-			break;
-		}
-		/* else nameserver port is already open, fall through */
-	case ZFCP_ERP_STEP_NAMESERVER_OPEN:
-		if (!atomic_test_mask(ZFCP_STATUS_COMMON_OPEN,
-				      &adapter->nameserver_port->status))
-			retval = ZFCP_ERP_FAILED;
-		else
-			retval = zfcp_erp_port_strategy_open_common_lookup
-				(erp_action);
-		break;
-
-	case ZFCP_ERP_STEP_NAMESERVER_LOOKUP:
-		if (!atomic_test_mask(ZFCP_STATUS_PORT_DID_DID, &port->status)) {
-			if (atomic_test_mask
-			    (ZFCP_STATUS_PORT_INVALID_WWPN, &port->status)) {
-				zfcp_erp_port_failed(port, 26, NULL);
-				retval = ZFCP_ERP_EXIT;
-			} else
-				retval = ZFCP_ERP_FAILED;
-		} else
-			retval = zfcp_erp_port_strategy_open_port(erp_action);
-		break;
-
-	case ZFCP_ERP_STEP_PORT_OPENING:
-		/* D_ID might have changed during open */
-		if (atomic_test_mask((ZFCP_STATUS_COMMON_OPEN |
-				      ZFCP_STATUS_PORT_DID_DID),
-				     &port->status))
-			retval = ZFCP_ERP_SUCCEEDED;
-		else
-			retval = ZFCP_ERP_FAILED;
-		break;
-
-	default:
-		/* unknown erp step */
-		retval = ZFCP_ERP_FAILED;
-	}
-
-	return retval;
-}
-
-static int
-zfcp_erp_port_strategy_open_nameserver(struct zfcp_erp_action *erp_action)
-{
-	int retval;
-	struct zfcp_port *port = erp_action->port;
-
-	switch (erp_action->step) {
-
-	case ZFCP_ERP_STEP_UNINITIALIZED:
-	case ZFCP_ERP_STEP_PHYS_PORT_CLOSING:
-	case ZFCP_ERP_STEP_PORT_CLOSING:
-		retval = zfcp_erp_port_strategy_open_port(erp_action);
-		break;
-
-	case ZFCP_ERP_STEP_PORT_OPENING:
-		if (atomic_test_mask(ZFCP_STATUS_COMMON_OPEN, &port->status))
-			retval = ZFCP_ERP_SUCCEEDED;
-		else
-			retval = ZFCP_ERP_FAILED;
-		/* this is needed anyway (dont care for retval of wakeup) */
-		zfcp_erp_port_strategy_open_nameserver_wakeup(erp_action);
-		break;
-
-	default:
-		/* unknown erp step */
-		retval = ZFCP_ERP_FAILED;
-	}
-
-	return retval;
-}
-
-/*
- * function:
- *
- * purpose:	makes the erp thread continue with reopen (physical) port
- *		actions which have been paused until the name server port
- *		is opened (or failed)
- *
- * returns:	0	(a kind of void retval, its not used)
- */
-static int
-zfcp_erp_port_strategy_open_nameserver_wakeup(struct zfcp_erp_action
-					      *ns_erp_action)
-{
-	int retval = 0;
-	unsigned long flags;
-	struct zfcp_adapter *adapter = ns_erp_action->adapter;
-	struct zfcp_erp_action *erp_action, *tmp;
-
-	read_lock_irqsave(&adapter->erp_lock, flags);
-	list_for_each_entry_safe(erp_action, tmp, &adapter->erp_running_head,
-				 list) {
-		if (erp_action->step == ZFCP_ERP_STEP_NAMESERVER_OPEN) {
-			if (atomic_test_mask(
-				    ZFCP_STATUS_COMMON_ERP_FAILED,
-				    &adapter->nameserver_port->status))
-				zfcp_erp_port_failed(erp_action->port, 27,
-						     NULL);
-			zfcp_erp_action_ready(erp_action);
-		}
-	}
-	read_unlock_irqrestore(&adapter->erp_lock, flags);
-
-	return retval;
-}
-
-/*
- * function:
- *
- * purpose:
- *
- * returns:	ZFCP_ERP_CONTINUES	- action continues (asynchronously)
- *		ZFCP_ERP_FAILED		- action finished unsuccessfully
- */
-static int
-zfcp_erp_port_forced_strategy_close(struct zfcp_erp_action *erp_action)
-{
-	int retval;
-
-	retval = zfcp_fsf_close_physical_port(erp_action);
-	if (retval == -ENOMEM) {
-		retval = ZFCP_ERP_NOMEM;
-		goto out;
-	}
-	erp_action->step = ZFCP_ERP_STEP_PHYS_PORT_CLOSING;
-	if (retval != 0) {
-		/* could not send 'open', fail */
-		retval = ZFCP_ERP_FAILED;
-		goto out;
-	}
-	retval = ZFCP_ERP_CONTINUES;
- out:
-	return retval;
-}
-
-static int
-zfcp_erp_port_strategy_clearstati(struct zfcp_port *port)
-{
-	int retval = 0;
-
-	atomic_clear_mask(ZFCP_STATUS_COMMON_OPENING |
-			  ZFCP_STATUS_COMMON_CLOSING |
-			  ZFCP_STATUS_COMMON_ACCESS_DENIED |
-			  ZFCP_STATUS_PORT_DID_DID |
-			  ZFCP_STATUS_PORT_PHYS_CLOSING |
-			  ZFCP_STATUS_PORT_INVALID_WWPN,
-			  &port->status);
-	return retval;
-}
-
-/*
- * function:
- *
- * purpose:
- *
- * returns:	ZFCP_ERP_CONTINUES	- action continues (asynchronously)
- *		ZFCP_ERP_FAILED		- action finished unsuccessfully
- */
-static int
-zfcp_erp_port_strategy_close(struct zfcp_erp_action *erp_action)
-{
-	int retval;
-
-	retval = zfcp_fsf_close_port(erp_action);
-	if (retval == -ENOMEM) {
-		retval = ZFCP_ERP_NOMEM;
-		goto out;
-	}
-	erp_action->step = ZFCP_ERP_STEP_PORT_CLOSING;
-	if (retval != 0) {
-		/* could not send 'close', fail */
-		retval = ZFCP_ERP_FAILED;
-		goto out;
-	}
-	retval = ZFCP_ERP_CONTINUES;
- out:
-	return retval;
-}
-
-/*
- * function:
- *
- * purpose:
- *
- * returns:	ZFCP_ERP_CONTINUES	- action continues (asynchronously)
- *		ZFCP_ERP_FAILED		- action finished unsuccessfully
- */
-static int
-zfcp_erp_port_strategy_open_port(struct zfcp_erp_action *erp_action)
-{
-	int retval;
-
-	retval = zfcp_fsf_open_port(erp_action);
-	if (retval == -ENOMEM) {
-		retval = ZFCP_ERP_NOMEM;
-		goto out;
-	}
-	erp_action->step = ZFCP_ERP_STEP_PORT_OPENING;
-	if (retval != 0) {
-		/* could not send 'open', fail */
-		retval = ZFCP_ERP_FAILED;
-		goto out;
-	}
-	retval = ZFCP_ERP_CONTINUES;
- out:
-	return retval;
-}
-
-/*
- * function:
- *
- * purpose:
- *
- * returns:	ZFCP_ERP_CONTINUES	- action continues (asynchronously)
- *		ZFCP_ERP_FAILED		- action finished unsuccessfully
- */
-static int
-zfcp_erp_port_strategy_open_common_lookup(struct zfcp_erp_action *erp_action)
-{
-	int retval;
-
-	retval = zfcp_fc_ns_gid_pn_request(erp_action);
-	if (retval == -ENOMEM) {
-		retval = ZFCP_ERP_NOMEM;
-		goto out;
-	}
-	erp_action->step = ZFCP_ERP_STEP_NAMESERVER_LOOKUP;
-	if (retval != 0) {
-		/* could not send nameserver request, fail */
-		retval = ZFCP_ERP_FAILED;
-		goto out;
-	}
-	retval = ZFCP_ERP_CONTINUES;
- out:
-	return retval;
-}
-
-/*
- * function:
- *
- * purpose:	this routine executes the 'Reopen Unit' action
- *		currently no retries
- *
- * returns:	ZFCP_ERP_CONTINUES	- action continues (asynchronously)
- *		ZFCP_ERP_SUCCEEDED	- action finished successfully
- *		ZFCP_ERP_FAILED		- action finished unsuccessfully
- */
-static int
-zfcp_erp_unit_strategy(struct zfcp_erp_action *erp_action)
-{
-	int retval = ZFCP_ERP_FAILED;
-	struct zfcp_unit *unit = erp_action->unit;
-
-	switch (erp_action->step) {
-
-		/*
-		 * FIXME:
-		 * the ULP spec. begs for waiting for oustanding commands
-		 */
-	case ZFCP_ERP_STEP_UNINITIALIZED:
-		zfcp_erp_unit_strategy_clearstati(unit);
-		if (atomic_test_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status)) {
-			retval = zfcp_erp_unit_strategy_close(erp_action);
-			break;
-		}
-		/* else it's already closed, fall through */
-	case ZFCP_ERP_STEP_UNIT_CLOSING:
-		if (atomic_test_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status))
-			retval = ZFCP_ERP_FAILED;
-		else
-			if (erp_action->status & ZFCP_STATUS_ERP_CLOSE_ONLY)
-				retval = ZFCP_ERP_EXIT;
-			else
-				retval =
-				    zfcp_erp_unit_strategy_open(erp_action);
-		break;
-
-	case ZFCP_ERP_STEP_UNIT_OPENING:
-		if (atomic_test_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status))
-			retval = ZFCP_ERP_SUCCEEDED;
-		else
-			retval = ZFCP_ERP_FAILED;
-		break;
-	}
-
-	return retval;
-}
-
-static int
-zfcp_erp_unit_strategy_clearstati(struct zfcp_unit *unit)
-{
-	int retval = 0;
-
-	atomic_clear_mask(ZFCP_STATUS_COMMON_OPENING |
-			  ZFCP_STATUS_COMMON_CLOSING |
-			  ZFCP_STATUS_COMMON_ACCESS_DENIED |
-			  ZFCP_STATUS_UNIT_SHARED |
-			  ZFCP_STATUS_UNIT_READONLY,
-			  &unit->status);
-
-	return retval;
-}
-
-/*
- * function:
- *
- * purpose:
- *
- * returns:	ZFCP_ERP_CONTINUES	- action continues (asynchronously)
- *		ZFCP_ERP_FAILED		- action finished unsuccessfully
- */
-static int
-zfcp_erp_unit_strategy_close(struct zfcp_erp_action *erp_action)
-{
-	int retval;
-
-	retval = zfcp_fsf_close_unit(erp_action);
-	if (retval == -ENOMEM) {
-		retval = ZFCP_ERP_NOMEM;
-		goto out;
-	}
-	erp_action->step = ZFCP_ERP_STEP_UNIT_CLOSING;
-	if (retval != 0) {
-		/* could not send 'close', fail */
-		retval = ZFCP_ERP_FAILED;
-		goto out;
-	}
-	retval = ZFCP_ERP_CONTINUES;
-
- out:
-	return retval;
-}
-
-/*
- * function:
- *
- * purpose:
- *
- * returns:	ZFCP_ERP_CONTINUES	- action continues (asynchronously)
- *		ZFCP_ERP_FAILED		- action finished unsuccessfully
- */
-static int
-zfcp_erp_unit_strategy_open(struct zfcp_erp_action *erp_action)
-{
-	int retval;
-
-	retval = zfcp_fsf_open_unit(erp_action);
-	if (retval == -ENOMEM) {
-		retval = ZFCP_ERP_NOMEM;
-		goto out;
-	}
-	erp_action->step = ZFCP_ERP_STEP_UNIT_OPENING;
-	if (retval != 0) {
-		/* could not send 'open', fail */
-		retval = ZFCP_ERP_FAILED;
-		goto out;
-	}
-	retval = ZFCP_ERP_CONTINUES;
- out:
-	return retval;
-}
-
-void zfcp_erp_start_timer(struct zfcp_fsf_req *fsf_req)
-{
-	BUG_ON(!fsf_req->erp_action);
-	fsf_req->timer.function = zfcp_erp_timeout_handler;
-	fsf_req->timer.data = (unsigned long) fsf_req->erp_action;
-	fsf_req->timer.expires = jiffies + ZFCP_ERP_FSFREQ_TIMEOUT;
-	add_timer(&fsf_req->timer);
-}
-
-/*
- * function:
- *
- * purpose:	enqueue the specified error recovery action, if needed
- *
- * returns:
- */
-static int zfcp_erp_action_enqueue(int want, struct zfcp_adapter *adapter,
-				   struct zfcp_port *port,
-				   struct zfcp_unit *unit, u8 id, void *ref)
-{
-	int retval = 1, need = want;
-	struct zfcp_erp_action *erp_action = NULL;
-	u32 status = 0;
-
-	/*
-	 * We need some rules here which check whether we really need
-	 * this action or whether we should just drop it.
-	 * E.g. if there is a unfinished 'Reopen Port' request then we drop a
-	 * 'Reopen Unit' request for an associated unit since we can't
-	 * satisfy this request now. A 'Reopen Port' action will trigger
-	 * 'Reopen Unit' actions when it completes.
-	 * Thus, there are only actions in the queue which can immediately be
-	 * executed. This makes the processing of the action queue more
-	 * efficient.
-	 */
-
-	if (!atomic_test_mask(ZFCP_STATUS_ADAPTER_ERP_THREAD_UP,
-			      &adapter->status))
-		return -EIO;
-
-	/* check whether we really need this */
-	switch (want) {
-	case ZFCP_ERP_ACTION_REOPEN_UNIT:
-		if (atomic_test_mask
-		    (ZFCP_STATUS_COMMON_ERP_INUSE, &unit->status)) {
-			goto out;
-		}
-		if (!atomic_test_mask
-		    (ZFCP_STATUS_COMMON_RUNNING, &port->status) ||
-		    atomic_test_mask
-		    (ZFCP_STATUS_COMMON_ERP_FAILED, &port->status)) {
-			goto out;
-		}
-		if (!atomic_test_mask
-		    (ZFCP_STATUS_COMMON_UNBLOCKED, &port->status))
-			need = ZFCP_ERP_ACTION_REOPEN_PORT;
-		/* fall through !!! */
-
-	case ZFCP_ERP_ACTION_REOPEN_PORT:
-		if (atomic_test_mask
-		    (ZFCP_STATUS_COMMON_ERP_INUSE, &port->status)) {
-			goto out;
-		}
-		/* fall through !!! */
-
-	case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED:
-		if (atomic_test_mask(ZFCP_STATUS_COMMON_ERP_INUSE,
-				     &port->status))
-			goto out;
-		if (!atomic_test_mask
-		    (ZFCP_STATUS_COMMON_RUNNING, &adapter->status) ||
-		    atomic_test_mask
-		    (ZFCP_STATUS_COMMON_ERP_FAILED, &adapter->status)) {
-			goto out;
+	switch (retval) {
+	case ZFCP_ERP_NOMEM:
+		if (!(erp_action->status & ZFCP_STATUS_ERP_LOWMEM)) {
+			++adapter->erp_low_mem_count;
+			erp_action->status |= ZFCP_STATUS_ERP_LOWMEM;
 		}
-		if (!atomic_test_mask
-		    (ZFCP_STATUS_COMMON_UNBLOCKED, &adapter->status))
-			need = ZFCP_ERP_ACTION_REOPEN_ADAPTER;
-		/* fall through !!! */
-
-	case ZFCP_ERP_ACTION_REOPEN_ADAPTER:
-		if (atomic_test_mask
-		    (ZFCP_STATUS_COMMON_ERP_INUSE, &adapter->status)) {
-			goto out;
+		if (adapter->erp_total_count == adapter->erp_low_mem_count)
+			_zfcp_erp_adapter_reopen(adapter, 0, 66, NULL);
+		else {
+			zfcp_erp_strategy_memwait(erp_action);
+			retval = ZFCP_ERP_CONTINUES;
 		}
-		break;
-
-	default:
-		/* unknown erp action */
-		goto out;
-	}
-
-	/* mark adapter to have some error recovery pending */
-	atomic_set_mask(ZFCP_STATUS_ADAPTER_ERP_PENDING, &adapter->status);
-
-	/* setup error recovery action */
-	switch (need) {
-
-	case ZFCP_ERP_ACTION_REOPEN_UNIT:
-		zfcp_unit_get(unit);
-		atomic_set_mask(ZFCP_STATUS_COMMON_ERP_INUSE, &unit->status);
-		erp_action = &unit->erp_action;
-		if (!atomic_test_mask
-		    (ZFCP_STATUS_COMMON_RUNNING, &unit->status))
-			status = ZFCP_STATUS_ERP_CLOSE_ONLY;
-		break;
-
-	case ZFCP_ERP_ACTION_REOPEN_PORT:
-	case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED:
-		zfcp_port_get(port);
-		zfcp_erp_action_dismiss_port(port);
-		atomic_set_mask(ZFCP_STATUS_COMMON_ERP_INUSE, &port->status);
-		erp_action = &port->erp_action;
-		if (!atomic_test_mask
-		    (ZFCP_STATUS_COMMON_RUNNING, &port->status))
-			status = ZFCP_STATUS_ERP_CLOSE_ONLY;
-		break;
+		goto unlock;
 
-	case ZFCP_ERP_ACTION_REOPEN_ADAPTER:
-		zfcp_adapter_get(adapter);
-		zfcp_erp_action_dismiss_adapter(adapter);
-		atomic_set_mask(ZFCP_STATUS_COMMON_ERP_INUSE, &adapter->status);
-		erp_action = &adapter->erp_action;
-		if (!atomic_test_mask
-		    (ZFCP_STATUS_COMMON_RUNNING, &adapter->status))
-			status = ZFCP_STATUS_ERP_CLOSE_ONLY;
-		break;
+	case ZFCP_ERP_CONTINUES:
+		if (erp_action->status & ZFCP_STATUS_ERP_LOWMEM) {
+			--adapter->erp_low_mem_count;
+			erp_action->status &= ~ZFCP_STATUS_ERP_LOWMEM;
+		}
+		goto unlock;
 	}
 
-	memset(erp_action, 0, sizeof (struct zfcp_erp_action));
-	erp_action->adapter = adapter;
-	erp_action->port = port;
-	erp_action->unit = unit;
-	erp_action->action = need;
-	erp_action->status = status;
+	retval = zfcp_erp_strategy_check_target(erp_action, retval);
+	zfcp_erp_action_dequeue(erp_action);
+	retval = zfcp_erp_strategy_statechange(erp_action, retval);
+	if (retval == ZFCP_ERP_EXIT)
+		goto unlock;
+	zfcp_erp_strategy_followup_actions(erp_action);
 
-	++adapter->erp_total_count;
+ unlock:
+	write_unlock(&adapter->erp_lock);
+	read_unlock_irqrestore(&zfcp_data.config_lock, flags);
+
+	if (retval != ZFCP_ERP_CONTINUES)
+		zfcp_erp_action_cleanup(erp_action, retval);
 
-	/* finally put it into 'ready' queue and kick erp thread */
-	list_add_tail(&erp_action->list, &adapter->erp_ready_head);
-	up(&adapter->erp_ready_sem);
-	zfcp_rec_dbf_event_thread(1, adapter);
-	retval = 0;
- out:
-	zfcp_rec_dbf_event_trigger(id, ref, want, need, erp_action,
-				   adapter, port, unit);
 	return retval;
 }
 
-static int
-zfcp_erp_action_dequeue(struct zfcp_erp_action *erp_action)
+static int zfcp_erp_thread(void *data)
 {
-	int retval = 0;
-	struct zfcp_adapter *adapter = erp_action->adapter;
+	struct zfcp_adapter *adapter = (struct zfcp_adapter *) data;
+	struct list_head *next;
+	struct zfcp_erp_action *act;
+	unsigned long flags;
 
-	--adapter->erp_total_count;
-	if (erp_action->status & ZFCP_STATUS_ERP_LOWMEM) {
-		--adapter->erp_low_mem_count;
-		erp_action->status &= ~ZFCP_STATUS_ERP_LOWMEM;
-	}
+	daemonize("zfcperp%s", adapter->ccw_device->dev.bus_id);
+	/* Block all signals */
+	siginitsetinv(&current->blocked, 0);
+	atomic_set_mask(ZFCP_STATUS_ADAPTER_ERP_THREAD_UP, &adapter->status);
+	wake_up(&adapter->erp_thread_wqh);
 
-	list_del(&erp_action->list);
-	zfcp_rec_dbf_event_action(144, erp_action);
+	while (!(atomic_read(&adapter->status) &
+		 ZFCP_STATUS_ADAPTER_ERP_THREAD_KILL)) {
+		write_lock_irqsave(&adapter->erp_lock, flags);
+		next = adapter->erp_ready_head.next;
+		write_unlock_irqrestore(&adapter->erp_lock, flags);
 
-	switch (erp_action->action) {
-	case ZFCP_ERP_ACTION_REOPEN_UNIT:
-		atomic_clear_mask(ZFCP_STATUS_COMMON_ERP_INUSE,
-				  &erp_action->unit->status);
-		break;
-	case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED:
-	case ZFCP_ERP_ACTION_REOPEN_PORT:
-		atomic_clear_mask(ZFCP_STATUS_COMMON_ERP_INUSE,
-				  &erp_action->port->status);
-		break;
-	case ZFCP_ERP_ACTION_REOPEN_ADAPTER:
-		atomic_clear_mask(ZFCP_STATUS_COMMON_ERP_INUSE,
-				  &erp_action->adapter->status);
-		break;
-	default:
-		/* bug */
-		break;
+		if (next != &adapter->erp_ready_head) {
+			act = list_entry(next, struct zfcp_erp_action, list);
+
+			/* there is more to come after dismission, no notify */
+			if (zfcp_erp_strategy(act) != ZFCP_ERP_DISMISSED)
+				zfcp_erp_wakeup(adapter);
+		}
+
+		zfcp_rec_dbf_event_thread(4, adapter);
+		down_interruptible(&adapter->erp_ready_sem);
+		zfcp_rec_dbf_event_thread(5, adapter);
 	}
-	return retval;
+
+	atomic_clear_mask(ZFCP_STATUS_ADAPTER_ERP_THREAD_UP, &adapter->status);
+	wake_up(&adapter->erp_thread_wqh);
+
+	return 0;
 }
 
 /**
- * zfcp_erp_action_cleanup
+ * zfcp_erp_thread_setup - Start ERP thread for adapter
+ * @adapter: Adapter to start the ERP thread for
  *
- * Register unit with scsi stack if appropriate and fix reference counts.
- * Note: Temporary units are not registered with scsi stack.
+ * Returns 0 on success or error code from kernel_thread()
  */
-static void
-zfcp_erp_action_cleanup(int action, struct zfcp_adapter *adapter,
-			struct zfcp_port *port, struct zfcp_unit *unit,
-			int result)
+int zfcp_erp_thread_setup(struct zfcp_adapter *adapter)
 {
-	switch (action) {
-	case ZFCP_ERP_ACTION_REOPEN_UNIT:
-		if ((result == ZFCP_ERP_SUCCEEDED)
-		    && (!atomic_test_mask(ZFCP_STATUS_UNIT_TEMPORARY,
-					  &unit->status))
-		    && !unit->device
-		    && port->rport) {
-			atomic_set_mask(ZFCP_STATUS_UNIT_REGISTERED,
-					&unit->status);
-			if (atomic_test_mask(ZFCP_STATUS_UNIT_SCSI_WORK_PENDING,
-					     &unit->status) == 0)
-				zfcp_erp_schedule_work(unit);
-		}
-		zfcp_unit_put(unit);
-		break;
-	case ZFCP_ERP_ACTION_REOPEN_PORT_FORCED:
-	case ZFCP_ERP_ACTION_REOPEN_PORT:
-		if (atomic_test_mask(ZFCP_STATUS_PORT_NO_WWPN,
-				     &port->status)) {
-			zfcp_port_put(port);
-			break;
-		}
+	int retval;
 
-		if ((result == ZFCP_ERP_SUCCEEDED)
-		    && !port->rport) {
-			struct fc_rport_identifiers ids;
-			ids.node_name = port->wwnn;
-			ids.port_name = port->wwpn;
-			ids.port_id = port->d_id;
-			ids.roles = FC_RPORT_ROLE_FCP_TARGET;
-			port->rport =
-				fc_remote_port_add(adapter->scsi_host, 0, &ids);
-			if (!port->rport)
-				dev_err(&adapter->ccw_device->dev,
-					"Failed registration of rport "
-					"0x%016Lx.\n", port->wwpn);
-			else {
-				scsi_target_unblock(&port->rport->dev);
-				port->rport->maxframe_size = port->maxframe_size;
-				port->rport->supported_classes =
-					port->supported_classes;
-			}
-		}
-		if ((result != ZFCP_ERP_SUCCEEDED) && port->rport) {
-			fc_remote_port_delete(port->rport);
-			port->rport = NULL;
-		}
-		zfcp_port_put(port);
-		break;
-	case ZFCP_ERP_ACTION_REOPEN_ADAPTER:
-		if (result != ZFCP_ERP_SUCCEEDED) {
-			list_for_each_entry(port, &adapter->port_list_head, list)
-				if (port->rport &&
-				    !atomic_test_mask(ZFCP_STATUS_PORT_WKA,
-						      &port->status)) {
-					fc_remote_port_delete(port->rport);
-					port->rport = NULL;
-				}
-		}
-		zfcp_adapter_put(adapter);
-		break;
-	default:
-		break;
+	atomic_clear_mask(ZFCP_STATUS_ADAPTER_ERP_THREAD_UP, &adapter->status);
+	retval = kernel_thread(zfcp_erp_thread, adapter, SIGCHLD);
+	if (retval < 0) {
+		dev_err(&adapter->ccw_device->dev,
+			"Creation of ERP thread failed.\n");
+		return retval;
 	}
+	wait_event(adapter->erp_thread_wqh,
+		   atomic_read(&adapter->status) &
+			ZFCP_STATUS_ADAPTER_ERP_THREAD_UP);
+	return 0;
 }
 
+/**
+ * zfcp_erp_thread_kill - Stop ERP thread.
+ * @adapter: Adapter where the ERP thread should be stopped.
+ *
+ * The caller of this routine ensures that the specified adapter has
+ * been shut down and that this operation has been completed. Thus,
+ * there are no pending erp_actions which would need to be handled
+ * here.
+ */
+void zfcp_erp_thread_kill(struct zfcp_adapter *adapter)
+{
+	atomic_set_mask(ZFCP_STATUS_ADAPTER_ERP_THREAD_KILL, &adapter->status);
+	up(&adapter->erp_ready_sem);
+	zfcp_rec_dbf_event_thread_lock(2, adapter);
+
+	wait_event(adapter->erp_thread_wqh,
+		   !(atomic_read(&adapter->status) &
+				ZFCP_STATUS_ADAPTER_ERP_THREAD_UP));
 
-static void zfcp_erp_action_dismiss_adapter(struct zfcp_adapter *adapter)
+	atomic_clear_mask(ZFCP_STATUS_ADAPTER_ERP_THREAD_KILL,
+			  &adapter->status);
+}
+
+/**
+ * zfcp_erp_adapter_failed - Set adapter status to failed.
+ * @adapter: Failed adapter.
+ * @id: Event id for debug trace.
+ * @ref: Reference for debug trace.
+ */
+void zfcp_erp_adapter_failed(struct zfcp_adapter *adapter, u8 id, void *ref)
 {
-	struct zfcp_port *port;
+	zfcp_erp_modify_adapter_status(adapter, id, ref,
+				       ZFCP_STATUS_COMMON_ERP_FAILED, ZFCP_SET);
+	dev_err(&adapter->ccw_device->dev, "Adapter ERP failed.\n");
+}
 
-	if (atomic_test_mask(ZFCP_STATUS_COMMON_ERP_INUSE, &adapter->status))
-		zfcp_erp_action_dismiss(&adapter->erp_action);
+/**
+ * zfcp_erp_port_failed - Set port status to failed.
+ * @port: Failed port.
+ * @id: Event id for debug trace.
+ * @ref: Reference for debug trace.
+ */
+void zfcp_erp_port_failed(struct zfcp_port *port, u8 id, void *ref)
+{
+	zfcp_erp_modify_port_status(port, id, ref,
+				    ZFCP_STATUS_COMMON_ERP_FAILED, ZFCP_SET);
+
+	if (atomic_read(&port->status) & ZFCP_STATUS_PORT_WKA)
+		dev_err(&port->adapter->ccw_device->dev,
+			"Port ERP failed for WKA port d_id=0x%06x.\n",
+			port->d_id);
 	else
-		list_for_each_entry(port, &adapter->port_list_head, list)
-		    zfcp_erp_action_dismiss_port(port);
+		dev_err(&port->adapter->ccw_device->dev,
+			"Port ERP failed for port wwpn=0x%016Lx.\n",
+			port->wwpn);
 }
 
-static void zfcp_erp_action_dismiss_port(struct zfcp_port *port)
+/**
+ * zfcp_erp_unit_failed - Set unit status to failed.
+ * @unit: Failed unit.
+ * @id: Event id for debug trace.
+ * @ref: Reference for debug trace.
+ */
+void zfcp_erp_unit_failed(struct zfcp_unit *unit, u8 id, void *ref)
 {
-	struct zfcp_unit *unit;
+	zfcp_erp_modify_unit_status(unit, id, ref,
+				    ZFCP_STATUS_COMMON_ERP_FAILED, ZFCP_SET);
 
-	if (atomic_test_mask(ZFCP_STATUS_COMMON_ERP_INUSE, &port->status))
-		zfcp_erp_action_dismiss(&port->erp_action);
-	else
-		list_for_each_entry(unit, &port->unit_list_head, list)
-		    zfcp_erp_action_dismiss_unit(unit);
+	dev_err(&unit->port->adapter->ccw_device->dev,
+		"Unit ERP failed for unit 0x%016Lx on port 0x%016Lx.\n",
+		unit->fcp_lun, unit->port->wwpn);
 }
 
-static void zfcp_erp_action_dismiss_unit(struct zfcp_unit *unit)
+/**
+ * zfcp_erp_wait - wait for completion of error recovery on an adapter
+ * @adapter: adapter for which to wait for completion of its error recovery
+ */
+void zfcp_erp_wait(struct zfcp_adapter *adapter)
 {
-	if (atomic_test_mask(ZFCP_STATUS_COMMON_ERP_INUSE, &unit->status))
-		zfcp_erp_action_dismiss(&unit->erp_action);
+	wait_event(adapter->erp_done_wqh,
+		   !(atomic_read(&adapter->status) &
+			ZFCP_STATUS_ADAPTER_ERP_PENDING));
 }
 
-static void zfcp_erp_action_to_running(struct zfcp_erp_action *erp_action)
+/**
+ * zfcp_erp_modify_adapter_status - change adapter status bits
+ * @adapter: adapter to change the status
+ * @id: id for the debug trace
+ * @ref: reference for the debug trace
+ * @mask: status bits to change
+ * @set_or_clear: ZFCP_SET or ZFCP_CLEAR
+ *
+ * Changes in common status bits are propagated to attached ports and units.
+ */
+void zfcp_erp_modify_adapter_status(struct zfcp_adapter *adapter, u8 id,
+				    void *ref, u32 mask, int set_or_clear)
 {
-	list_move(&erp_action->list, &erp_action->adapter->erp_running_head);
-	zfcp_rec_dbf_event_action(145, erp_action);
+	struct zfcp_port *port;
+	u32 common_mask = mask & ZFCP_COMMON_FLAGS;
+
+	if (set_or_clear == ZFCP_SET) {
+		if (status_change_set(mask, &adapter->status))
+			zfcp_rec_dbf_event_adapter(id, ref, adapter);
+		atomic_set_mask(mask, &adapter->status);
+	} else {
+		if (status_change_clear(mask, &adapter->status))
+			zfcp_rec_dbf_event_adapter(id, ref, adapter);
+		atomic_clear_mask(mask, &adapter->status);
+		if (mask & ZFCP_STATUS_COMMON_ERP_FAILED)
+			atomic_set(&adapter->erp_counter, 0);
+	}
+
+	if (common_mask)
+		list_for_each_entry(port, &adapter->port_list_head, list)
+			zfcp_erp_modify_port_status(port, id, ref, common_mask,
+						    set_or_clear);
+}
+
+/**
+ * zfcp_erp_modify_port_status - change port status bits
+ * @port: port to change the status bits
+ * @id: id for the debug trace
+ * @ref: reference for the debug trace
+ * @mask: status bits to change
+ * @set_or_clear: ZFCP_SET or ZFCP_CLEAR
+ *
+ * Changes in common status bits are propagated to attached units.
+ */
+void zfcp_erp_modify_port_status(struct zfcp_port *port, u8 id, void *ref,
+				 u32 mask, int set_or_clear)
+{
+	struct zfcp_unit *unit;
+	u32 common_mask = mask & ZFCP_COMMON_FLAGS;
+
+	if (set_or_clear == ZFCP_SET) {
+		if (status_change_set(mask, &port->status))
+			zfcp_rec_dbf_event_port(id, ref, port);
+		atomic_set_mask(mask, &port->status);
+	} else {
+		if (status_change_clear(mask, &port->status))
+			zfcp_rec_dbf_event_port(id, ref, port);
+		atomic_clear_mask(mask, &port->status);
+		if (mask & ZFCP_STATUS_COMMON_ERP_FAILED)
+			atomic_set(&port->erp_counter, 0);
+	}
+
+	if (common_mask)
+		list_for_each_entry(unit, &port->unit_list_head, list)
+			zfcp_erp_modify_unit_status(unit, id, ref, common_mask,
+						    set_or_clear);
 }
 
-static void zfcp_erp_action_to_ready(struct zfcp_erp_action *erp_action)
+/**
+ * zfcp_erp_modify_unit_status - change unit status bits
+ * @unit: unit to change the status bits
+ * @id: id for the debug trace
+ * @ref: reference for the debug trace
+ * @mask: status bits to change
+ * @set_or_clear: ZFCP_SET or ZFCP_CLEAR
+ */
+void zfcp_erp_modify_unit_status(struct zfcp_unit *unit, u8 id, void *ref,
+				 u32 mask, int set_or_clear)
 {
-	list_move(&erp_action->list, &erp_action->adapter->erp_ready_head);
-	zfcp_rec_dbf_event_action(146, erp_action);
+	if (set_or_clear == ZFCP_SET) {
+		if (status_change_set(mask, &unit->status))
+			zfcp_rec_dbf_event_unit(id, ref, unit);
+		atomic_set_mask(mask, &unit->status);
+	} else {
+		if (status_change_clear(mask, &unit->status))
+			zfcp_rec_dbf_event_unit(id, ref, unit);
+		atomic_clear_mask(mask, &unit->status);
+		if (mask & ZFCP_STATUS_COMMON_ERP_FAILED) {
+			atomic_set(&unit->erp_counter, 0);
+		}
+	}
 }
 
+/**
+ * zfcp_erp_port_boxed - Mark port as "boxed" and start ERP
+ * @port: The "boxed" port.
+ * @id: The debug trace id.
+ * @id: Reference for the debug trace.
+ */
 void zfcp_erp_port_boxed(struct zfcp_port *port, u8 id, void *ref)
 {
 	unsigned long flags;
@@ -2614,6 +1687,12 @@ void zfcp_erp_port_boxed(struct zfcp_por
 	zfcp_erp_port_reopen(port, ZFCP_STATUS_COMMON_ERP_FAILED, id, ref);
 }
 
+/**
+ * zfcp_erp_unit_boxed - Mark unit as "boxed" and start ERP
+ * @port: The "boxed" unit.
+ * @id: The debug trace id.
+ * @id: Reference for the debug trace.
+ */
 void zfcp_erp_unit_boxed(struct zfcp_unit *unit, u8 id, void *ref)
 {
 	zfcp_erp_modify_unit_status(unit, id, ref,
@@ -2621,6 +1700,15 @@ void zfcp_erp_unit_boxed(struct zfcp_uni
 	zfcp_erp_unit_reopen(unit, ZFCP_STATUS_COMMON_ERP_FAILED, id, ref);
 }
 
+/**
+ * zfcp_erp_port_access_denied - Adapter denied access to port.
+ * @port: port where access has been denied
+ * @id: id for debug trace
+ * @ref: reference for debug trace
+ *
+ * Since the adapter has denied access, stop using the port and the
+ * attached units.
+ */
 void zfcp_erp_port_access_denied(struct zfcp_port *port, u8 id, void *ref)
 {
 	unsigned long flags;
@@ -2632,6 +1720,14 @@ void zfcp_erp_port_access_denied(struct 
 	read_unlock_irqrestore(&zfcp_data.config_lock, flags);
 }
 
+/**
+ * zfcp_erp_unit_access_denied - Adapter denied access to unit.
+ * @unit: unit where access has been denied
+ * @id: id for debug trace
+ * @ref: reference for debug trace
+ *
+ * Since the adapter has denied access, stop using the unit.
+ */
 void zfcp_erp_unit_access_denied(struct zfcp_unit *unit, u8 id, void *ref)
 {
 	zfcp_erp_modify_unit_status(unit, id, ref,
@@ -2639,33 +1735,26 @@ void zfcp_erp_unit_access_denied(struct 
 				    ZFCP_STATUS_COMMON_ACCESS_DENIED, ZFCP_SET);
 }
 
-void zfcp_erp_adapter_access_changed(struct zfcp_adapter *adapter, u8 id,
-				     void *ref)
+static void zfcp_erp_unit_access_changed(struct zfcp_unit *unit, u8 id,
+					 void *ref)
 {
-	struct zfcp_port *port;
-	unsigned long flags;
-
-	if (adapter->connection_features & FSF_FEATURE_NPIV_MODE)
+	int status = atomic_read(&unit->status);
+	if (!(status & (ZFCP_STATUS_COMMON_ACCESS_DENIED |
+			ZFCP_STATUS_COMMON_ACCESS_BOXED)))
 		return;
 
-	read_lock_irqsave(&zfcp_data.config_lock, flags);
-	if (adapter->nameserver_port)
-		zfcp_erp_port_access_changed(adapter->nameserver_port, id, ref);
-	list_for_each_entry(port, &adapter->port_list_head, list)
-		if (port != adapter->nameserver_port)
-			zfcp_erp_port_access_changed(port, id, ref);
-	read_unlock_irqrestore(&zfcp_data.config_lock, flags);
+	zfcp_erp_unit_reopen(unit, ZFCP_STATUS_COMMON_ERP_FAILED, id, ref);
 }
 
-void zfcp_erp_port_access_changed(struct zfcp_port *port, u8 id, void *ref)
+static void zfcp_erp_port_access_changed(struct zfcp_port *port, u8 id,
+					 void *ref)
 {
 	struct zfcp_unit *unit;
+	int status = atomic_read(&port->status);
 
-	if (!atomic_test_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED,
-			      &port->status) &&
-	    !atomic_test_mask(ZFCP_STATUS_COMMON_ACCESS_BOXED,
-			      &port->status)) {
-		if (!atomic_test_mask(ZFCP_STATUS_PORT_WKA, &port->status))
+	if (!(status & (ZFCP_STATUS_COMMON_ACCESS_DENIED |
+			ZFCP_STATUS_COMMON_ACCESS_BOXED))) {
+		if (!(status & ZFCP_STATUS_PORT_WKA))
 			list_for_each_entry(unit, &port->unit_list_head, list)
 				zfcp_erp_unit_access_changed(unit, id, ref);
 		return;
@@ -2674,13 +1763,26 @@ void zfcp_erp_port_access_changed(struct
 	zfcp_erp_port_reopen(port, ZFCP_STATUS_COMMON_ERP_FAILED, id, ref);
 }
 
-void zfcp_erp_unit_access_changed(struct zfcp_unit *unit, u8 id, void *ref)
+/**
+ * zfcp_erp_adapter_access_changed - Process change in adapter ACT
+ * @adapter: Adapter where the Access Control Table (ACT) changed
+ * @id: Id for debug trace
+ * @ref: Reference for debug trace
+ */
+void zfcp_erp_adapter_access_changed(struct zfcp_adapter *adapter, u8 id,
+				     void *ref)
 {
-	if (!atomic_test_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED,
-			      &unit->status) &&
-	    !atomic_test_mask(ZFCP_STATUS_COMMON_ACCESS_BOXED,
-			      &unit->status))
+	struct zfcp_port *port;
+	unsigned long flags;
+
+	if (adapter->connection_features & FSF_FEATURE_NPIV_MODE)
 		return;
 
-	zfcp_erp_unit_reopen(unit, ZFCP_STATUS_COMMON_ERP_FAILED, id, ref);
+	read_lock_irqsave(&zfcp_data.config_lock, flags);
+	if (adapter->nameserver_port)
+		zfcp_erp_port_access_changed(adapter->nameserver_port, id, ref);
+	list_for_each_entry(port, &adapter->port_list_head, list)
+		if (port != adapter->nameserver_port)
+			zfcp_erp_port_access_changed(port, id, ref);
+	read_unlock_irqrestore(&zfcp_data.config_lock, flags);
 }
--- a/drivers/s390/scsi/zfcp_def.h	2008-06-30 11:28:20.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_def.h	2008-06-30 11:28:44.000000000 +0200
@@ -91,17 +91,11 @@ zfcp_address_to_sg(void *address, struct
         /* max. number of (data buffer) SBALEs in largest SBAL chain
            multiplied with number of sectors per 4k block */
 
-#define ZFCP_TYPE2_RECOVERY_TIME        8	/* seconds */
-
 /********************* FSF SPECIFIC DEFINES *********************************/
 
 /* ATTENTION: value must not be used by hardware */
 #define FSF_QTCB_UNSOLICITED_STATUS		0x6305
 
-/* Do 1st retry in 1 second, then double the timeout for each following retry */
-#define ZFCP_EXCHANGE_CONFIG_DATA_FIRST_SLEEP	1
-#define ZFCP_EXCHANGE_CONFIG_DATA_RETRIES	7
-
 /* timeout value for "default timer" for fsf requests */
 #define ZFCP_FSF_REQUEST_TIMEOUT (60*HZ)
 
@@ -349,45 +343,6 @@ struct zfcp_rc_entry {
 #define ZFCP_STATUS_FSFREQ_RETRY                0x00000800
 #define ZFCP_STATUS_FSFREQ_DISMISSED            0x00001000
 
-/*********************** ERROR RECOVERY PROCEDURE DEFINES ********************/
-
-#define ZFCP_MAX_ERPS                   3
-
-#define ZFCP_ERP_FSFREQ_TIMEOUT		(30 * HZ)
-#define ZFCP_ERP_MEMWAIT_TIMEOUT	HZ
-
-#define ZFCP_STATUS_ERP_TIMEDOUT	0x10000000
-#define ZFCP_STATUS_ERP_CLOSE_ONLY	0x01000000
-#define ZFCP_STATUS_ERP_DISMISSING	0x00100000
-#define ZFCP_STATUS_ERP_DISMISSED	0x00200000
-#define ZFCP_STATUS_ERP_LOWMEM		0x00400000
-
-#define ZFCP_ERP_STEP_UNINITIALIZED	0x00000000
-#define ZFCP_ERP_STEP_FSF_XCONFIG	0x00000001
-#define ZFCP_ERP_STEP_PHYS_PORT_CLOSING	0x00000010
-#define ZFCP_ERP_STEP_PORT_CLOSING	0x00000100
-#define ZFCP_ERP_STEP_NAMESERVER_OPEN	0x00000200
-#define ZFCP_ERP_STEP_NAMESERVER_LOOKUP	0x00000400
-#define ZFCP_ERP_STEP_PORT_OPENING	0x00000800
-#define ZFCP_ERP_STEP_UNIT_CLOSING	0x00001000
-#define ZFCP_ERP_STEP_UNIT_OPENING	0x00002000
-
-/* Ordered by escalation level (necessary for proper erp-code operation) */
-#define ZFCP_ERP_ACTION_REOPEN_ADAPTER		0x4
-#define ZFCP_ERP_ACTION_REOPEN_PORT_FORCED	0x3
-#define ZFCP_ERP_ACTION_REOPEN_PORT		0x2
-#define ZFCP_ERP_ACTION_REOPEN_UNIT		0x1
-
-#define ZFCP_ERP_ACTION_RUNNING			0x1
-#define ZFCP_ERP_ACTION_READY			0x2
-
-#define ZFCP_ERP_SUCCEEDED	0x0
-#define ZFCP_ERP_FAILED		0x1
-#define ZFCP_ERP_CONTINUES	0x2
-#define ZFCP_ERP_EXIT		0x3
-#define ZFCP_ERP_DISMISSED	0x4
-#define ZFCP_ERP_NOMEM		0x5
-
 /************************* STRUCTURE DEFINITIONS *****************************/
 
 struct zfcp_fsf_req;
--- a/drivers/s390/scsi/zfcp_ext.h	2008-06-30 11:28:20.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_ext.h	2008-06-30 11:28:44.000000000 +0200
@@ -67,8 +67,6 @@ extern int  zfcp_fsf_exchange_port_data_
                                              struct fsf_qtcb_bottom_port *);
 extern struct zfcp_fsf_req *zfcp_fsf_control_file(struct zfcp_adapter *adapter,
 					   struct zfcp_fsf_cfdc *fsf_cfdc);
-extern void zfcp_fsf_start_timer(struct zfcp_fsf_req *, unsigned long);
-extern void zfcp_erp_start_timer(struct zfcp_fsf_req *);
 extern void zfcp_fsf_req_dismiss_all(struct zfcp_adapter *);
 extern int  zfcp_fsf_status_read(struct zfcp_adapter *);
 extern int zfcp_status_read_refill(struct zfcp_adapter *adapter);
@@ -103,37 +101,34 @@ extern struct fc_function_template zfcp_
 /******************************** ERP ****************************************/
 extern void zfcp_erp_modify_adapter_status(struct zfcp_adapter *, u8, void *,
 					   u32, int);
-extern int  zfcp_erp_adapter_reopen(struct zfcp_adapter *, int, u8, void *);
-extern int  zfcp_erp_adapter_shutdown(struct zfcp_adapter *, int, u8, void *);
+extern void zfcp_erp_adapter_reopen(struct zfcp_adapter *, int, u8, void *);
+extern void zfcp_erp_adapter_shutdown(struct zfcp_adapter *, int, u8, void *);
 extern void zfcp_erp_adapter_failed(struct zfcp_adapter *, u8, void *);
 
 extern void zfcp_erp_modify_port_status(struct zfcp_port *, u8, void *, u32,
 					int);
 extern int  zfcp_erp_port_reopen(struct zfcp_port *, int, u8, void *);
-extern int  zfcp_erp_port_shutdown(struct zfcp_port *, int, u8, void *);
-extern int  zfcp_erp_port_forced_reopen(struct zfcp_port *, int, u8, void *);
+extern void zfcp_erp_port_shutdown(struct zfcp_port *, int, u8, void *);
+extern void zfcp_erp_port_forced_reopen(struct zfcp_port *, int, u8, void *);
 extern void zfcp_erp_port_failed(struct zfcp_port *, u8, void *);
-extern int  zfcp_erp_port_reopen_all(struct zfcp_adapter *, int, u8, void *);
 
 extern void zfcp_erp_modify_unit_status(struct zfcp_unit *, u8, void *, u32,
 					int);
-extern int  zfcp_erp_unit_reopen(struct zfcp_unit *, int, u8, void *);
-extern int  zfcp_erp_unit_shutdown(struct zfcp_unit *, int, u8, void *);
+extern void zfcp_erp_unit_reopen(struct zfcp_unit *, int, u8, void *);
+extern void zfcp_erp_unit_shutdown(struct zfcp_unit *, int, u8, void *);
 extern void zfcp_erp_unit_failed(struct zfcp_unit *, u8, void *);
 
 extern int  zfcp_erp_thread_setup(struct zfcp_adapter *);
-extern int  zfcp_erp_thread_kill(struct zfcp_adapter *);
-extern int  zfcp_erp_wait(struct zfcp_adapter *);
-extern void zfcp_erp_async_handler(struct zfcp_erp_action *, unsigned long);
+extern void zfcp_erp_thread_kill(struct zfcp_adapter *);
+extern void zfcp_erp_wait(struct zfcp_adapter *);
+extern void zfcp_erp_notify(struct zfcp_erp_action *, unsigned long);
 
 extern void zfcp_erp_port_boxed(struct zfcp_port *, u8 id, void *ref);
 extern void zfcp_erp_unit_boxed(struct zfcp_unit *, u8 id, void *ref);
 extern void zfcp_erp_port_access_denied(struct zfcp_port *, u8 id, void *ref);
 extern void zfcp_erp_unit_access_denied(struct zfcp_unit *, u8 id, void *ref);
 extern void zfcp_erp_adapter_access_changed(struct zfcp_adapter *, u8, void *);
-extern void zfcp_erp_port_access_changed(struct zfcp_port *, u8, void *);
-extern void zfcp_erp_unit_access_changed(struct zfcp_unit *, u8, void *);
-
+extern void zfcp_erp_timeout_handler(unsigned long);
 /******************************** AUX ****************************************/
 extern void zfcp_sg_free_table(struct scatterlist *sg, int count);
 extern int  zfcp_sg_setup_table(struct scatterlist *sg, int count);
--- a/drivers/s390/scsi/zfcp_fsf.c	2008-06-30 11:28:20.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_fsf.c	2008-06-30 11:28:44.000000000 +0200
@@ -8,6 +8,31 @@
 
 #include "zfcp_ext.h"
 
+static void zfcp_fsf_request_timeout_handler(unsigned long data)
+{
+	struct zfcp_adapter *adapter = (struct zfcp_adapter *) data;
+	zfcp_erp_adapter_reopen(adapter, ZFCP_STATUS_COMMON_ERP_FAILED, 62,
+				NULL);
+}
+
+static void zfcp_fsf_start_timer(struct zfcp_fsf_req *fsf_req,
+				 unsigned long timeout)
+{
+	fsf_req->timer.function = zfcp_fsf_request_timeout_handler;
+	fsf_req->timer.data = (unsigned long) fsf_req->adapter;
+	fsf_req->timer.expires = jiffies + timeout;
+	add_timer(&fsf_req->timer);
+}
+
+static void zfcp_fsf_start_erp_timer(struct zfcp_fsf_req *fsf_req)
+{
+	BUG_ON(!fsf_req->erp_action);
+	fsf_req->timer.function = zfcp_erp_timeout_handler;
+	fsf_req->timer.data = (unsigned long) fsf_req->erp_action;
+	fsf_req->timer.expires = jiffies + 30 * HZ;
+	add_timer(&fsf_req->timer);
+}
+
 /* association between FSF command and FSF QTCB type */
 static u32 fsf_qtcb_type[] = {
 	[FSF_QTCB_FCP_CMND] =             FSF_IO_COMMAND,
@@ -485,7 +510,7 @@ void zfcp_fsf_req_complete(struct zfcp_f
 	req->handler(req);
 
 	if (req->erp_action)
-		zfcp_erp_async_handler(req->erp_action, 0);
+		zfcp_erp_notify(req->erp_action, 0);
 	req->status |= ZFCP_STATUS_FSFREQ_COMPLETED;
 
 	if (likely(req->status & ZFCP_STATUS_FSFREQ_CLEANUP))
@@ -1108,7 +1133,7 @@ int zfcp_fsf_send_ct(struct zfcp_send_ct
 	if (erp_action) {
 		erp_action->fsf_req = req;
 		req->erp_action = erp_action;
-		zfcp_erp_start_timer(req);
+		zfcp_fsf_start_erp_timer(req);
 	} else
 		zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT);
 
@@ -1263,7 +1288,7 @@ int zfcp_fsf_exchange_config_data(struct
 	req->handler = zfcp_fsf_exchange_config_data_handler;
 	erp_action->fsf_req = req;
 
-	zfcp_erp_start_timer(req);
+	zfcp_fsf_start_erp_timer(req);
 	retval = zfcp_fsf_req_send(req);
 	if (retval) {
 		zfcp_fsf_req_free(req);
@@ -1353,7 +1378,7 @@ int zfcp_fsf_exchange_port_data(struct z
 	req->erp_action = erp_action;
 	erp_action->fsf_req = req;
 
-	zfcp_erp_start_timer(req);
+	zfcp_fsf_start_erp_timer(req);
 	retval = zfcp_fsf_req_send(req);
 	if (retval) {
 		zfcp_fsf_req_free(req);
@@ -1530,7 +1555,7 @@ int zfcp_fsf_open_port(struct zfcp_erp_a
 	erp_action->fsf_req = req;
 	atomic_set_mask(ZFCP_STATUS_COMMON_OPENING, &erp_action->port->status);
 
-	zfcp_erp_start_timer(req);
+	zfcp_fsf_start_erp_timer(req);
 	retval = zfcp_fsf_req_send(req);
 	if (retval) {
 		zfcp_fsf_req_free(req);
@@ -1601,7 +1626,7 @@ int zfcp_fsf_close_port(struct zfcp_erp_
 	erp_action->fsf_req = req;
 	atomic_set_mask(ZFCP_STATUS_COMMON_CLOSING, &erp_action->port->status);
 
-	zfcp_erp_start_timer(req);
+	zfcp_fsf_start_erp_timer(req);
 	retval = zfcp_fsf_req_send(req);
 	if (retval) {
 		zfcp_fsf_req_free(req);
@@ -1699,7 +1724,7 @@ int zfcp_fsf_close_physical_port(struct 
 	atomic_set_mask(ZFCP_STATUS_PORT_PHYS_CLOSING,
 			&erp_action->port->status);
 
-	zfcp_erp_start_timer(req);
+	zfcp_fsf_start_erp_timer(req);
 	retval = zfcp_fsf_req_send(req);
 	if (retval) {
 		zfcp_fsf_req_free(req);
@@ -1878,7 +1903,7 @@ int zfcp_fsf_open_unit(struct zfcp_erp_a
 
 	atomic_set_mask(ZFCP_STATUS_COMMON_OPENING, &erp_action->unit->status);
 
-	zfcp_erp_start_timer(req);
+	zfcp_fsf_start_erp_timer(req);
 	retval = zfcp_fsf_req_send(req);
 	if (retval) {
 		zfcp_fsf_req_free(req);
@@ -1963,7 +1988,7 @@ int zfcp_fsf_close_unit(struct zfcp_erp_
 	erp_action->fsf_req = req;
 	atomic_set_mask(ZFCP_STATUS_COMMON_CLOSING, &erp_action->unit->status);
 
-	zfcp_erp_start_timer(req);
+	zfcp_fsf_start_erp_timer(req);
 	retval = zfcp_fsf_req_send(req);
 	if (retval) {
 		zfcp_fsf_req_free(req);

-- 

[patch 11/11] zfcp: Cleanup external header file

[christof.schmitt]

[-- Attachment #1: zfcp_ext.diff --]
[-- Type: text/plain, Size: 15159 bytes --]

From: Christof Schmitt <christof.schmitt@de.ibm.com>

Sort the extern definitions by file.

Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com>
Signed-off-by: Swen Schillig <swen@vnet.ibm.com>
---
 drivers/s390/scsi/zfcp_ext.h |  242 ++++++++++++++++++++-----------------------
 1 file changed, 118 insertions(+), 124 deletions(-)

--- a/drivers/s390/scsi/zfcp_ext.h	2008-06-30 11:28:44.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_ext.h	2008-06-30 11:29:05.000000000 +0200
@@ -11,160 +11,154 @@
 
 #include "zfcp_def.h"
 
-extern struct zfcp_data zfcp_data;
-
-/* zfcp_sysfs.c */
-extern struct attribute_group zfcp_sysfs_unit_attrs;
-extern struct attribute_group zfcp_sysfs_adapter_attrs;
-extern struct attribute_group zfcp_sysfs_ns_port_attrs;
-extern struct attribute_group zfcp_sysfs_port_attrs;
-extern struct device_attribute *zfcp_sysfs_sdev_attrs[];
-extern struct device_attribute *zfcp_sysfs_shost_attrs[];
-
-/**************************** CONFIGURATION  *********************************/
-extern struct zfcp_unit *zfcp_get_unit_by_lun(struct zfcp_port *, fcp_lun_t);
-extern struct zfcp_port *zfcp_get_port_by_wwpn(struct zfcp_adapter *, wwn_t);
-extern int    zfcp_adapter_enqueue(struct ccw_device *);
-extern int    zfcp_adapter_debug_register(struct zfcp_adapter *);
-extern void   zfcp_adapter_dequeue(struct zfcp_adapter *);
-extern void   zfcp_adapter_debug_unregister(struct zfcp_adapter *);
-extern struct zfcp_port *zfcp_port_enqueue(struct zfcp_adapter *, wwn_t,
-					   u32, u32);
-extern void   zfcp_port_dequeue(struct zfcp_port *);
+/* zfcp_aux.c */
+extern struct zfcp_unit *zfcp_get_unit_by_lun(struct zfcp_port *,
+					      fcp_lun_t);
+extern struct zfcp_port *zfcp_get_port_by_wwpn(struct zfcp_adapter *,
+					       wwn_t);
+extern int zfcp_adapter_enqueue(struct ccw_device *);
+extern void zfcp_adapter_dequeue(struct zfcp_adapter *);
+extern struct zfcp_port *zfcp_port_enqueue(struct zfcp_adapter *, wwn_t, u32,
+					   u32);
+extern void zfcp_port_dequeue(struct zfcp_port *);
 extern struct zfcp_unit *zfcp_unit_enqueue(struct zfcp_port *, fcp_lun_t);
-extern void   zfcp_unit_dequeue(struct zfcp_unit *);
-extern int zfcp_scan_ports(struct zfcp_adapter *);
-extern void _zfcp_scan_ports_later(struct work_struct *work);
-
-/******************************* S/390 IO ************************************/
-extern int  zfcp_ccw_register(void);
-
-extern int  zfcp_qdio_allocate(struct zfcp_adapter *);
-extern void zfcp_qdio_free(struct zfcp_adapter *);
-extern int  zfcp_qdio_send(struct zfcp_fsf_req *fsf_req);
-
-extern volatile struct qdio_buffer_element *zfcp_qdio_sbale_req
-	(struct zfcp_fsf_req *);
-extern volatile struct qdio_buffer_element *zfcp_qdio_sbale_curr
-	(struct zfcp_fsf_req *);
-extern int zfcp_qdio_sbals_from_sg
-	(struct zfcp_fsf_req *, unsigned long, struct scatterlist *, int);
-extern int zfcp_qdio_open(struct zfcp_adapter *adapter);
-extern void zfcp_qdio_close(struct zfcp_adapter *adapter);
-/******************************** FSF ****************************************/
-extern int  zfcp_fsf_open_port(struct zfcp_erp_action *);
-extern int  zfcp_fsf_close_port(struct zfcp_erp_action *);
-extern int  zfcp_fsf_close_physical_port(struct zfcp_erp_action *);
-
-extern int  zfcp_fsf_open_unit(struct zfcp_erp_action *);
-extern int  zfcp_fsf_close_unit(struct zfcp_erp_action *);
-
-extern int  zfcp_fsf_exchange_config_data(struct zfcp_erp_action *);
-extern int  zfcp_fsf_exchange_config_data_sync(struct zfcp_adapter *,
-                                              struct fsf_qtcb_bottom_config *);
-extern int  zfcp_fsf_exchange_port_data(struct zfcp_erp_action *);
-extern int  zfcp_fsf_exchange_port_data_sync(struct zfcp_adapter *,
-                                             struct fsf_qtcb_bottom_port *);
-extern struct zfcp_fsf_req *zfcp_fsf_control_file(struct zfcp_adapter *adapter,
-					   struct zfcp_fsf_cfdc *fsf_cfdc);
-extern void zfcp_fsf_req_dismiss_all(struct zfcp_adapter *);
-extern int  zfcp_fsf_status_read(struct zfcp_adapter *);
-extern int zfcp_status_read_refill(struct zfcp_adapter *adapter);
-extern int zfcp_fsf_send_ct(struct zfcp_send_ct *, mempool_t *,
-			    struct zfcp_erp_action *);
-extern int zfcp_fsf_send_els(struct zfcp_send_els *);
-extern int  zfcp_fsf_send_fcp_command_task(struct zfcp_adapter *,
-					   struct zfcp_unit *,
-					   struct scsi_cmnd *, int, int);
-extern void zfcp_fsf_req_complete(struct zfcp_fsf_req *);
-extern void zfcp_fsf_req_free(struct zfcp_fsf_req *);
-extern struct zfcp_fsf_req *zfcp_fsf_send_fcp_ctm(struct zfcp_adapter *,
-						     struct zfcp_unit *, u8,
-						     int);
-extern struct zfcp_fsf_req *zfcp_fsf_abort_fcp_command(
-	unsigned long, struct zfcp_adapter *, struct zfcp_unit *, int);
+extern void zfcp_unit_dequeue(struct zfcp_unit *);
+extern int zfcp_reqlist_isempty(struct zfcp_adapter *);
+extern void zfcp_sg_free_table(struct scatterlist *, int);
+extern int zfcp_sg_setup_table(struct scatterlist *, int);
 
-/******************************* FC/FCP **************************************/
-extern void zfcp_fc_incoming_els(struct zfcp_fsf_req *);
-extern int  zfcp_fc_ns_gid_pn_request(struct zfcp_erp_action *);
-extern void zfcp_fc_plogi_evaluate(struct zfcp_port *, struct fsf_plogi *);
-extern void  zfcp_test_link(struct zfcp_port *);
+/* zfcp_ccw.c */
+extern int zfcp_ccw_register(void);
 
-/******************************* SCSI ****************************************/
-extern int  zfcp_adapter_scsi_register(struct zfcp_adapter *);
-extern void zfcp_adapter_scsi_unregister(struct zfcp_adapter *);
-extern void zfcp_set_fcp_dl(struct fcp_cmnd_iu *, fcp_dl_t);
-extern char *zfcp_get_fcp_sns_info_ptr(struct fcp_rsp_iu *);
+/* zfcp_cfdc.c */
+extern struct miscdevice zfcp_cfdc_misc;
 
-extern struct fc_function_template zfcp_transport_functions;
+/* zfcp_dbf.c */
+extern int zfcp_adapter_debug_register(struct zfcp_adapter *);
+extern void zfcp_adapter_debug_unregister(struct zfcp_adapter *);
+extern void zfcp_rec_dbf_event_thread(u8, struct zfcp_adapter *);
+extern void zfcp_rec_dbf_event_thread_lock(u8, struct zfcp_adapter *);
+extern void zfcp_rec_dbf_event_adapter(u8, void *, struct zfcp_adapter *);
+extern void zfcp_rec_dbf_event_port(u8, void *, struct zfcp_port *);
+extern void zfcp_rec_dbf_event_unit(u8, void *, struct zfcp_unit *);
+extern void zfcp_rec_dbf_event_trigger(u8, void *, u8, u8, void *,
+				       struct zfcp_adapter *,
+				       struct zfcp_port *, struct zfcp_unit *);
+extern void zfcp_rec_dbf_event_action(u8, struct zfcp_erp_action *);
+extern void zfcp_hba_dbf_event_fsf_response(struct zfcp_fsf_req *);
+extern void zfcp_hba_dbf_event_fsf_unsol(const char *, struct zfcp_adapter *,
+					 struct fsf_status_read_buffer *);
+extern void zfcp_hba_dbf_event_qdio(struct zfcp_adapter *,
+				    unsigned int, unsigned int, unsigned int,
+				    int, int);
+extern void zfcp_san_dbf_event_ct_request(struct zfcp_fsf_req *);
+extern void zfcp_san_dbf_event_ct_response(struct zfcp_fsf_req *);
+extern void zfcp_san_dbf_event_els_request(struct zfcp_fsf_req *);
+extern void zfcp_san_dbf_event_els_response(struct zfcp_fsf_req *);
+extern void zfcp_san_dbf_event_incoming_els(struct zfcp_fsf_req *);
+extern void zfcp_scsi_dbf_event_result(const char *, int, struct zfcp_adapter *,
+				       struct scsi_cmnd *,
+				       struct zfcp_fsf_req *);
+extern void zfcp_scsi_dbf_event_abort(const char *, struct zfcp_adapter *,
+				      struct scsi_cmnd *, struct zfcp_fsf_req *,
+				      unsigned long);
+extern void zfcp_scsi_dbf_event_devreset(const char *, u8, struct zfcp_unit *,
+					 struct scsi_cmnd *);
 
-/******************************** ERP ****************************************/
+/* zfcp_erp.c */
 extern void zfcp_erp_modify_adapter_status(struct zfcp_adapter *, u8, void *,
 					   u32, int);
 extern void zfcp_erp_adapter_reopen(struct zfcp_adapter *, int, u8, void *);
 extern void zfcp_erp_adapter_shutdown(struct zfcp_adapter *, int, u8, void *);
 extern void zfcp_erp_adapter_failed(struct zfcp_adapter *, u8, void *);
-
 extern void zfcp_erp_modify_port_status(struct zfcp_port *, u8, void *, u32,
 					int);
 extern int  zfcp_erp_port_reopen(struct zfcp_port *, int, u8, void *);
 extern void zfcp_erp_port_shutdown(struct zfcp_port *, int, u8, void *);
 extern void zfcp_erp_port_forced_reopen(struct zfcp_port *, int, u8, void *);
 extern void zfcp_erp_port_failed(struct zfcp_port *, u8, void *);
-
 extern void zfcp_erp_modify_unit_status(struct zfcp_unit *, u8, void *, u32,
 					int);
 extern void zfcp_erp_unit_reopen(struct zfcp_unit *, int, u8, void *);
 extern void zfcp_erp_unit_shutdown(struct zfcp_unit *, int, u8, void *);
 extern void zfcp_erp_unit_failed(struct zfcp_unit *, u8, void *);
-
 extern int  zfcp_erp_thread_setup(struct zfcp_adapter *);
 extern void zfcp_erp_thread_kill(struct zfcp_adapter *);
 extern void zfcp_erp_wait(struct zfcp_adapter *);
 extern void zfcp_erp_notify(struct zfcp_erp_action *, unsigned long);
-
-extern void zfcp_erp_port_boxed(struct zfcp_port *, u8 id, void *ref);
-extern void zfcp_erp_unit_boxed(struct zfcp_unit *, u8 id, void *ref);
-extern void zfcp_erp_port_access_denied(struct zfcp_port *, u8 id, void *ref);
-extern void zfcp_erp_unit_access_denied(struct zfcp_unit *, u8 id, void *ref);
+extern void zfcp_erp_port_boxed(struct zfcp_port *, u8, void *);
+extern void zfcp_erp_unit_boxed(struct zfcp_unit *, u8, void *);
+extern void zfcp_erp_port_access_denied(struct zfcp_port *, u8, void *);
+extern void zfcp_erp_unit_access_denied(struct zfcp_unit *, u8, void *);
 extern void zfcp_erp_adapter_access_changed(struct zfcp_adapter *, u8, void *);
 extern void zfcp_erp_timeout_handler(unsigned long);
-/******************************** AUX ****************************************/
-extern void zfcp_sg_free_table(struct scatterlist *sg, int count);
-extern int  zfcp_sg_setup_table(struct scatterlist *sg, int count);
-extern void zfcp_rec_dbf_event_thread(u8 id, struct zfcp_adapter *adapter);
-extern void zfcp_rec_dbf_event_thread_lock(u8 id, struct zfcp_adapter *adapter);
-extern void zfcp_rec_dbf_event_adapter(u8 id, void *ref, struct zfcp_adapter *);
-extern void zfcp_rec_dbf_event_port(u8 id, void *ref, struct zfcp_port *port);
-extern void zfcp_rec_dbf_event_unit(u8 id, void *ref, struct zfcp_unit *unit);
-extern void zfcp_rec_dbf_event_trigger(u8 id, void *ref, u8 want, u8 need,
-				       void *action, struct zfcp_adapter *,
-				       struct zfcp_port *, struct zfcp_unit *);
-extern void zfcp_rec_dbf_event_action(u8 id, struct zfcp_erp_action *);
 
-extern void zfcp_hba_dbf_event_fsf_response(struct zfcp_fsf_req *);
-extern void zfcp_hba_dbf_event_fsf_unsol(const char *, struct zfcp_adapter *,
-					 struct fsf_status_read_buffer *);
-extern void zfcp_hba_dbf_event_qdio(struct zfcp_adapter *,
-				    unsigned int, unsigned int, unsigned int,
-				    int, int);
+/* zfcp_fc.c */
+extern int zfcp_scan_ports(struct zfcp_adapter *);
+extern void _zfcp_scan_ports_later(struct work_struct *);
+extern void zfcp_fc_incoming_els(struct zfcp_fsf_req *);
+extern int zfcp_fc_ns_gid_pn_request(struct zfcp_erp_action *);
+extern void zfcp_fc_plogi_evaluate(struct zfcp_port *, struct fsf_plogi *);
+extern void zfcp_test_link(struct zfcp_port *);
 
-extern void zfcp_san_dbf_event_ct_request(struct zfcp_fsf_req *);
-extern void zfcp_san_dbf_event_ct_response(struct zfcp_fsf_req *);
-extern void zfcp_san_dbf_event_els_request(struct zfcp_fsf_req *);
-extern void zfcp_san_dbf_event_els_response(struct zfcp_fsf_req *);
-extern void zfcp_san_dbf_event_incoming_els(struct zfcp_fsf_req *);
+/* zfcp_fsf.c */
+extern int zfcp_fsf_open_port(struct zfcp_erp_action *);
+extern int zfcp_fsf_close_port(struct zfcp_erp_action *);
+extern int zfcp_fsf_close_physical_port(struct zfcp_erp_action *);
+extern int zfcp_fsf_open_unit(struct zfcp_erp_action *);
+extern int zfcp_fsf_close_unit(struct zfcp_erp_action *);
+extern int zfcp_fsf_exchange_config_data(struct zfcp_erp_action *);
+extern int zfcp_fsf_exchange_config_data_sync(struct zfcp_adapter *,
+					      struct fsf_qtcb_bottom_config *);
+extern int zfcp_fsf_exchange_port_data(struct zfcp_erp_action *);
+extern int zfcp_fsf_exchange_port_data_sync(struct zfcp_adapter *,
+					    struct fsf_qtcb_bottom_port *);
+extern struct zfcp_fsf_req *zfcp_fsf_control_file(struct zfcp_adapter *,
+						  struct zfcp_fsf_cfdc *);
+extern void zfcp_fsf_req_dismiss_all(struct zfcp_adapter *);
+extern int zfcp_fsf_status_read(struct zfcp_adapter *);
+extern int zfcp_status_read_refill(struct zfcp_adapter *adapter);
+extern int zfcp_fsf_send_ct(struct zfcp_send_ct *, mempool_t *,
+			    struct zfcp_erp_action *);
+extern int zfcp_fsf_send_els(struct zfcp_send_els *);
+extern int zfcp_fsf_send_fcp_command_task(struct zfcp_adapter *,
+					  struct zfcp_unit *,
+					  struct scsi_cmnd *, int, int);
+extern void zfcp_fsf_req_complete(struct zfcp_fsf_req *);
+extern void zfcp_fsf_req_free(struct zfcp_fsf_req *);
+extern struct zfcp_fsf_req *zfcp_fsf_send_fcp_ctm(struct zfcp_adapter *,
+						  struct zfcp_unit *, u8, int);
+extern struct zfcp_fsf_req *zfcp_fsf_abort_fcp_command(unsigned long,
+						       struct zfcp_adapter *,
+						       struct zfcp_unit *, int);
 
-extern void zfcp_scsi_dbf_event_result(const char *, int, struct zfcp_adapter *,
-				       struct scsi_cmnd *,
-				       struct zfcp_fsf_req *);
-extern void zfcp_scsi_dbf_event_abort(const char *, struct zfcp_adapter *,
-				      struct scsi_cmnd *, struct zfcp_fsf_req *,
-				      unsigned long);
-extern void zfcp_scsi_dbf_event_devreset(const char *, u8, struct zfcp_unit *,
-					 struct scsi_cmnd *);
-extern int zfcp_reqlist_isempty(struct zfcp_adapter *);
+/* zfcp_qdio.c */
+extern int zfcp_qdio_allocate(struct zfcp_adapter *);
+extern void zfcp_qdio_free(struct zfcp_adapter *);
+extern int zfcp_qdio_send(struct zfcp_fsf_req *);
+extern volatile struct qdio_buffer_element *zfcp_qdio_sbale_req(
+						struct zfcp_fsf_req *);
+extern volatile struct qdio_buffer_element *zfcp_qdio_sbale_curr(
+						struct zfcp_fsf_req *);
+extern int zfcp_qdio_sbals_from_sg(struct zfcp_fsf_req *, unsigned long,
+				   struct scatterlist *, int);
+extern int zfcp_qdio_open(struct zfcp_adapter *);
+extern void zfcp_qdio_close(struct zfcp_adapter *);
 
-extern struct miscdevice zfcp_cfdc_misc;
+/* zfcp_scsi.c */
+extern struct zfcp_data zfcp_data;
+extern int zfcp_adapter_scsi_register(struct zfcp_adapter *);
+extern void zfcp_adapter_scsi_unregister(struct zfcp_adapter *);
+extern void zfcp_set_fcp_dl(struct fcp_cmnd_iu *, fcp_dl_t);
+extern char *zfcp_get_fcp_sns_info_ptr(struct fcp_rsp_iu *);
+extern struct fc_function_template zfcp_transport_functions;
+
+/* zfcp_sysfs.c */
+extern struct attribute_group zfcp_sysfs_unit_attrs;
+extern struct attribute_group zfcp_sysfs_adapter_attrs;
+extern struct attribute_group zfcp_sysfs_ns_port_attrs;
+extern struct attribute_group zfcp_sysfs_port_attrs;
+extern struct device_attribute *zfcp_sysfs_sdev_attrs[];
+extern struct device_attribute *zfcp_sysfs_shost_attrs[];
 
 #endif	/* ZFCP_EXT_H */

-- 

[patch 00/11] Updated zfcp patches for 2.6.27

[Christof Schmitt]

James,

this replaces the patch series sent on June 30th. The only changes are
the string handling while parsing the kernel parameter for the initial
device and one fix in the erp patch. Patches apply to current
scsi-misc.

Christof

[patch 03/11] zfcp: Adapter reopen for large number of unsolicited status

[Christof Schmitt]

[-- Attachment #1: zfcp_aux_cleanup_avoid_mini_race.diff --]
[-- Type: text/plain, Size: 2216 bytes --]

From: Swen Schillig <swen@vnet.ibm.com>

When zfcp receives 16 unsolicited status messages, this could trigger
an adapter reopen. In this case, first try to send a new status read,
and only if this fails, go through the recovery.

Signed-off-by: Swen Schillig <swen@vnet.ibm.com>
Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com>
---
 drivers/s390/scsi/zfcp_aux.c |   15 +++++++--------
 drivers/s390/scsi/zfcp_def.h |    3 +--
 2 files changed, 8 insertions(+), 10 deletions(-)

--- a/drivers/s390/scsi/zfcp_aux.c	2008-06-27 18:06:59.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_aux.c	2008-06-27 18:07:57.000000000 +0200
@@ -550,15 +550,14 @@ static void zfcp_dummy_release(struct de
 int zfcp_status_read_refill(struct zfcp_adapter *adapter)
 {
 	while (atomic_read(&adapter->stat_miss) > 0)
-		if (zfcp_fsf_status_read(adapter, ZFCP_WAIT_FOR_SBAL))
+		if (zfcp_fsf_status_read(adapter, ZFCP_WAIT_FOR_SBAL)) {
+			if (atomic_read(&adapter->stat_miss) >= 16) {
+				zfcp_erp_adapter_reopen(adapter, 0, 103, NULL);
+				return 1;
+			}
 			break;
-	else
-		atomic_dec(&adapter->stat_miss);
-
-	if (ZFCP_STATUS_READS_RECOM <= atomic_read(&adapter->stat_miss)) {
-		zfcp_erp_adapter_reopen(adapter, 0, 103, NULL);
-		return 1;
-	}
+		} else
+			atomic_dec(&adapter->stat_miss);
 	return 0;
 }
 
--- a/drivers/s390/scsi/zfcp_def.h	2008-06-27 18:06:59.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_def.h	2008-06-27 18:07:57.000000000 +0200
@@ -108,7 +108,6 @@ zfcp_address_to_sg(void *address, struct
 #define ZFCP_QTCB_VERSION	FSF_QTCB_CURRENT_VERSION
 /* ATTENTION: value must not be used by hardware */
 #define FSF_QTCB_UNSOLICITED_STATUS		0x6305
-#define ZFCP_STATUS_READS_RECOM		        FSF_STATUS_READS_RECOM
 
 /* Do 1st retry in 1 second, then double the timeout for each following retry */
 #define ZFCP_EXCHANGE_CONFIG_DATA_FIRST_SLEEP	1
@@ -743,7 +742,7 @@ struct zfcp_data {
 #define ZFCP_POOL_FSF_REQ_ERP_NR	1
 #define ZFCP_POOL_FSF_REQ_SCSI_NR	1
 #define ZFCP_POOL_FSF_REQ_ABORT_NR	1
-#define ZFCP_POOL_STATUS_READ_NR	ZFCP_STATUS_READS_RECOM
+#define ZFCP_POOL_STATUS_READ_NR	FSF_STATUS_READS_RECOM
 #define ZFCP_POOL_DATA_GID_PN_NR	1
 
 /* struct used by memory pools for fsf_requests */

--