[PATCH 09/16] scsi_transport_iscsi: use session as argument for iscsi_block_scsi_eh()

[Hannes Reinecke <hare@suse.de>]

We should be passing in the session directly instead of deriving it
from the scsi command.

Signed-off-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Christoph Hellwig <hch@lst.de>
---
 drivers/scsi/qla4xxx/ql4_os.c       | 34 ++++++++++++++++++-----------
 drivers/scsi/scsi_transport_iscsi.c |  6 ++---
 include/scsi/scsi_transport_iscsi.h |  2 +-
 3 files changed, 24 insertions(+), 18 deletions(-)

diff --git a/drivers/scsi/qla4xxx/ql4_os.c b/drivers/scsi/qla4xxx/ql4_os.c
index 675332e49a7b..961fe65bbe65 100644
--- a/drivers/scsi/qla4xxx/ql4_os.c
+++ b/drivers/scsi/qla4xxx/ql4_os.c
@@ -9272,15 +9272,18 @@ static int qla4xxx_eh_abort(struct scsi_cmnd *cmd)
  **/
 static int qla4xxx_eh_device_reset(struct scsi_cmnd *cmd)
 {
-	struct scsi_qla_host *ha = to_qla_host(cmd->device->host);
-	struct ddb_entry *ddb_entry = cmd->device->hostdata;
+	struct scsi_device *sdev = cmd->device;
+	struct scsi_qla_host *ha = to_qla_host(sdev->host);
+	struct iscsi_cls_session *session;
+	struct ddb_entry *ddb_entry = sdev->hostdata;
 	int ret = FAILED, stat;
 	int rval;
 
 	if (!ddb_entry)
 		return ret;
 
-	ret = iscsi_block_scsi_eh(cmd);
+	session = starget_to_session(scsi_target(sdev));
+	ret = iscsi_block_scsi_eh(session);
 	if (ret)
 		return ret;
 	ret = FAILED;
@@ -9341,19 +9344,25 @@ static int qla4xxx_eh_device_reset(struct scsi_cmnd *cmd)
  **/
 static int qla4xxx_eh_target_reset(struct scsi_cmnd *cmd)
 {
-	struct scsi_qla_host *ha = to_qla_host(cmd->device->host);
-	struct ddb_entry *ddb_entry = cmd->device->hostdata;
+	struct scsi_target *starget = scsi_target(cmd->device);
+	struct iscsi_cls_session *cls_session = starget_to_session(starget);
+	struct iscsi_session *sess;
+	struct scsi_qla_host *ha;
+	struct ddb_entry *ddb_entry;
 	int stat, ret;
 	int rval;
 
+	sess = cls_session->dd_data;
+	ddb_entry = sess->dd_data;
 	if (!ddb_entry)
 		return FAILED;
+	ha = ddb_entry->ha;
 
-	ret = iscsi_block_scsi_eh(cmd);
+	ret = iscsi_block_scsi_eh(cls_session);
 	if (ret)
 		return ret;
 
-	starget_printk(KERN_INFO, scsi_target(cmd->device),
+	starget_printk(KERN_INFO, starget,
 		       "WARM TARGET RESET ISSUED.\n");
 
 	DEBUG2(printk(KERN_INFO
@@ -9370,14 +9379,13 @@ static int qla4xxx_eh_target_reset(struct scsi_cmnd *cmd)
 
 	stat = qla4xxx_reset_target(ha, ddb_entry);
 	if (stat != QLA_SUCCESS) {
-		starget_printk(KERN_INFO, scsi_target(cmd->device),
+		starget_printk(KERN_INFO, starget,
 			       "WARM TARGET RESET FAILED.\n");
 		return FAILED;
 	}
 
-	if (qla4xxx_eh_wait_for_commands(ha, scsi_target(cmd->device),
-					 NULL)) {
-		starget_printk(KERN_INFO, scsi_target(cmd->device),
+	if (qla4xxx_eh_wait_for_commands(ha, starget, NULL)) {
+		starget_printk(KERN_INFO, starget,
 			       "WARM TARGET DEVICE RESET FAILED - "
 			       "waiting for commands.\n");
 		return FAILED;
@@ -9386,13 +9394,13 @@ static int qla4xxx_eh_target_reset(struct scsi_cmnd *cmd)
 	/* Send marker. */
 	if (qla4xxx_send_marker_iocb(ha, ddb_entry, cmd->device->lun,
 		MM_TGT_WARM_RESET) != QLA_SUCCESS) {
-		starget_printk(KERN_INFO, scsi_target(cmd->device),
+		starget_printk(KERN_INFO, starget,
 			       "WARM TARGET DEVICE RESET FAILED - "
 			       "marker iocb failed.\n");
 		return FAILED;
 	}
 
-	starget_printk(KERN_INFO, scsi_target(cmd->device),
+	starget_printk(KERN_INFO, starget,
 		       "WARM TARGET RESET SUCCEEDED.\n");
 	return SUCCESS;
 }
diff --git a/drivers/scsi/scsi_transport_iscsi.c b/drivers/scsi/scsi_transport_iscsi.c
index 3075b2ddf7a6..4e81ef882a49 100644
--- a/drivers/scsi/scsi_transport_iscsi.c
+++ b/drivers/scsi/scsi_transport_iscsi.c
@@ -1838,17 +1838,15 @@ static void iscsi_scan_session(struct work_struct *work)
 
 /**
  * iscsi_block_scsi_eh - block scsi eh until session state has transistioned
- * @cmd: scsi cmd passed to scsi eh handler
+ * @session: iscsi session derived from scsi eh handler argument
  *
  * If the session is down this function will wait for the recovery
  * timer to fire or for the session to be logged back in. If the
  * recovery timer fires then FAST_IO_FAIL is returned. The caller
  * should pass this error value to the scsi eh.
  */
-int iscsi_block_scsi_eh(struct scsi_cmnd *cmd)
+int iscsi_block_scsi_eh(struct iscsi_cls_session *session)
 {
-	struct iscsi_cls_session *session =
-			starget_to_session(scsi_target(cmd->device));
 	unsigned long flags;
 	int ret = 0;
 
diff --git a/include/scsi/scsi_transport_iscsi.h b/include/scsi/scsi_transport_iscsi.h
index fb3399e4cd29..8ec36de5d236 100644
--- a/include/scsi/scsi_transport_iscsi.h
+++ b/include/scsi/scsi_transport_iscsi.h
@@ -466,7 +466,7 @@ extern struct iscsi_endpoint *iscsi_create_endpoint(int dd_size);
 extern void iscsi_destroy_endpoint(struct iscsi_endpoint *ep);
 extern struct iscsi_endpoint *iscsi_lookup_endpoint(u64 handle);
 extern void iscsi_put_endpoint(struct iscsi_endpoint *ep);
-extern int iscsi_block_scsi_eh(struct scsi_cmnd *cmd);
+extern int iscsi_block_scsi_eh(struct iscsi_cls_session *session);
 extern struct iscsi_iface *iscsi_create_iface(struct Scsi_Host *shost,
 					      struct iscsi_transport *t,
 					      uint32_t iface_type,
-- 
2.35.3