[PATCH 0/5] qla2xxx: Patches for 3.7-rc.

[PATCH 0/5] qla2xxx: Patches for 3.7-rc.

[Saurav Kashyap]

Hi James,

Please apply the following patches for 3.7-rc.

Thanks,
~Saurav
 


Armen Baloyan (1):
  qla2xxx: Properly set result field of bsg_job reply structure for
    success and failure.

David Jeffery (1):
  qla2xxx: Test and clear FCPORT_UPDATE_NEEDED atomically.

Giridhar Malavali (1):
  qla2xxx: Change in setting UNLOADING flag and FC vports logout
    sequence while unloading qla2xxx driver.

Saurav Kashyap (1):
  qla2xxx: Update the driver version to 8.04.00.08-k.

Steve Hodgson (1):
  qla2xxx: Free rsp_data even on error in qla2x00_process_loopback()

 drivers/scsi/qla2xxx/qla_attr.c    |    3 +-
 drivers/scsi/qla2xxx/qla_bsg.c     |   72 ++++++++++++++----------------------
 drivers/scsi/qla2xxx/qla_os.c      |    7 +--
 drivers/scsi/qla2xxx/qla_version.h |    2 +-
 4 files changed, 33 insertions(+), 51 deletions(-)

-- 
1.7.7

[PATCH 1/5] qla2xxx: Properly set result field of bsg_job reply structure for success and failure.

[Saurav Kashyap]

From: Armen Baloyan <armen.baloyan@qlogic.com>

FC transport on receiving bsg_job submission failure, calls bsg_job->job_done()
and sets the bsg_job->reply->result the returned value. In contrast, when the
success code (0) is returned fc transport doesn't call bsg_job->job_done() and
doesn't populate bsg_job->reply->result.

Signed-off-by: Steve Hodgson <steve@purestorage.com>
Signed-off-by: Armen Baloyan <armen.baloyan@qlogic.com>
Signed-off-by: Saurav Kashyap <saurav.kashyap@qlogic.com>
---
 drivers/scsi/qla2xxx/qla_bsg.c |   65 +++++++++++++++-------------------------
 1 files changed, 24 insertions(+), 41 deletions(-)

diff --git a/drivers/scsi/qla2xxx/qla_bsg.c b/drivers/scsi/qla2xxx/qla_bsg.c
index 2f9bddd..05520be 100644
--- a/drivers/scsi/qla2xxx/qla_bsg.c
+++ b/drivers/scsi/qla2xxx/qla_bsg.c
@@ -219,7 +219,8 @@ qla24xx_proc_fcp_prio_cfg_cmd(struct fc_bsg_job *bsg_job)
 		break;
 	}
 exit_fcp_prio_cfg:
-	bsg_job->job_done(bsg_job);
+	if (!ret)
+		bsg_job->job_done(bsg_job);
 	return ret;
 }
 
@@ -741,7 +742,6 @@ qla2x00_process_loopback(struct fc_bsg_job *bsg_job)
 			if (qla81xx_get_port_config(vha, config)) {
 				ql_log(ql_log_warn, vha, 0x701f,
 				    "Get port config failed.\n");
-				bsg_job->reply->result = (DID_ERROR << 16);
 				rval = -EPERM;
 				goto done_free_dma_req;
 			}
@@ -761,7 +761,6 @@ qla2x00_process_loopback(struct fc_bsg_job *bsg_job)
 				    new_config, elreq.options);
 
 			if (rval) {
-				bsg_job->reply->result = (DID_ERROR << 16);
 				rval = -EPERM;
 				goto done_free_dma_req;
 			}
@@ -795,7 +794,6 @@ qla2x00_process_loopback(struct fc_bsg_job *bsg_job)
 					    "MPI reset failed.\n");
 				}
 
-				bsg_job->reply->result = (DID_ERROR << 16);
 				rval = -EIO;
 				goto done_free_dma_req;
 			}
@@ -812,33 +810,25 @@ qla2x00_process_loopback(struct fc_bsg_job *bsg_job)
 		ql_log(ql_log_warn, vha, 0x702c,
 		    "Vendor request %s failed.\n", type);
 
-		fw_sts_ptr = ((uint8_t *)bsg_job->req->sense) +
-		    sizeof(struct fc_bsg_reply);
-
-		memcpy(fw_sts_ptr, response, sizeof(response));
-		fw_sts_ptr += sizeof(response);
-		*fw_sts_ptr = command_sent;
 		rval = 0;
 		bsg_job->reply->result = (DID_ERROR << 16);
+		bsg_job->reply->reply_payload_rcv_len = 0;
 	} else {
 		ql_dbg(ql_dbg_user, vha, 0x702d,
 		    "Vendor request %s completed.\n", type);
-
-		bsg_job->reply_len = sizeof(struct fc_bsg_reply) +
-			sizeof(response) + sizeof(uint8_t);
-		bsg_job->reply->reply_payload_rcv_len =
-			bsg_job->reply_payload.payload_len;
-		fw_sts_ptr = ((uint8_t *)bsg_job->req->sense) +
-			sizeof(struct fc_bsg_reply);
-		memcpy(fw_sts_ptr, response, sizeof(response));
-		fw_sts_ptr += sizeof(response);
-		*fw_sts_ptr = command_sent;
-		bsg_job->reply->result = DID_OK;
+		bsg_job->reply->result = (DID_OK << 16);
 		sg_copy_from_buffer(bsg_job->reply_payload.sg_list,
 			bsg_job->reply_payload.sg_cnt, rsp_data,
 			rsp_data_len);
 	}
-	bsg_job->job_done(bsg_job);
+
+	bsg_job->reply_len = sizeof(struct fc_bsg_reply) +
+	    sizeof(response) + sizeof(uint8_t);
+	fw_sts_ptr = ((uint8_t *)bsg_job->req->sense) +
+	    sizeof(struct fc_bsg_reply);
+	memcpy(fw_sts_ptr, response, sizeof(response));
+	fw_sts_ptr += sizeof(response);
+	*fw_sts_ptr = command_sent;
 
 	dma_free_coherent(&ha->pdev->dev, rsp_data_len,
 		rsp_data, rsp_data_dma);
@@ -853,6 +843,8 @@ done_unmap_req_sg:
 	dma_unmap_sg(&ha->pdev->dev,
 	    bsg_job->request_payload.sg_list,
 	    bsg_job->request_payload.sg_cnt, DMA_TO_DEVICE);
+	if (!rval)
+		bsg_job->job_done(bsg_job);
 	return rval;
 }
 
@@ -877,16 +869,15 @@ qla84xx_reset(struct fc_bsg_job *bsg_job)
 	if (rval) {
 		ql_log(ql_log_warn, vha, 0x7030,
 		    "Vendor request 84xx reset failed.\n");
-		rval = 0;
-		bsg_job->reply->result = (DID_ERROR << 16);
+		rval = (DID_ERROR << 16);
 
 	} else {
 		ql_dbg(ql_dbg_user, vha, 0x7031,
 		    "Vendor request 84xx reset completed.\n");
 		bsg_job->reply->result = DID_OK;
+		bsg_job->job_done(bsg_job);
 	}
 
-	bsg_job->job_done(bsg_job);
 	return rval;
 }
 
@@ -976,8 +967,7 @@ qla84xx_updatefw(struct fc_bsg_job *bsg_job)
 		ql_log(ql_log_warn, vha, 0x7037,
 		    "Vendor request 84xx updatefw failed.\n");
 
-		rval = 0;
-		bsg_job->reply->result = (DID_ERROR << 16);
+		rval = (DID_ERROR << 16);
 	} else {
 		ql_dbg(ql_dbg_user, vha, 0x7038,
 		    "Vendor request 84xx updatefw completed.\n");
@@ -986,7 +976,6 @@ qla84xx_updatefw(struct fc_bsg_job *bsg_job)
 		bsg_job->reply->result = DID_OK;
 	}
 
-	bsg_job->job_done(bsg_job);
 	dma_pool_free(ha->s_dma_pool, mn, mn_dma);
 
 done_free_fw_buf:
@@ -996,6 +985,8 @@ done_unmap_sg:
 	dma_unmap_sg(&ha->pdev->dev, bsg_job->request_payload.sg_list,
 		bsg_job->request_payload.sg_cnt, DMA_TO_DEVICE);
 
+	if (!rval)
+		bsg_job->job_done(bsg_job);
 	return rval;
 }
 
@@ -1163,8 +1154,7 @@ qla84xx_mgmt_cmd(struct fc_bsg_job *bsg_job)
 		ql_log(ql_log_warn, vha, 0x7043,
 		    "Vendor request 84xx mgmt failed.\n");
 
-		rval = 0;
-		bsg_job->reply->result = (DID_ERROR << 16);
+		rval = (DID_ERROR << 16);
 
 	} else {
 		ql_dbg(ql_dbg_user, vha, 0x7044,
@@ -1184,8 +1174,6 @@ qla84xx_mgmt_cmd(struct fc_bsg_job *bsg_job)
 		}
 	}
 
-	bsg_job->job_done(bsg_job);
-
 done_unmap_sg:
 	if (mgmt_b)
 		dma_free_coherent(&ha->pdev->dev, data_len, mgmt_b, mgmt_dma);
@@ -1200,6 +1188,8 @@ done_unmap_sg:
 exit_mgmt:
 	dma_pool_free(ha->s_dma_pool, mn, mn_dma);
 
+	if (!rval)
+		bsg_job->job_done(bsg_job);
 	return rval;
 }
 
@@ -1276,9 +1266,7 @@ qla24xx_iidma(struct fc_bsg_job *bsg_job)
 		    fcport->port_name[3], fcport->port_name[4],
 		    fcport->port_name[5], fcport->port_name[6],
 		    fcport->port_name[7], rval, fcport->fp_speed, mb[0], mb[1]);
-		rval = 0;
-		bsg_job->reply->result = (DID_ERROR << 16);
-
+		rval = (DID_ERROR << 16);
 	} else {
 		if (!port_param->mode) {
 			bsg_job->reply_len = sizeof(struct fc_bsg_reply) +
@@ -1292,9 +1280,9 @@ qla24xx_iidma(struct fc_bsg_job *bsg_job)
 		}
 
 		bsg_job->reply->result = DID_OK;
+		bsg_job->job_done(bsg_job);
 	}
 
-	bsg_job->job_done(bsg_job);
 	return rval;
 }
 
@@ -1887,8 +1875,6 @@ qla2x00_process_vendor_specific(struct fc_bsg_job *bsg_job)
 		return qla24xx_process_bidir_cmd(bsg_job);
 
 	default:
-		bsg_job->reply->result = (DID_ERROR << 16);
-		bsg_job->job_done(bsg_job);
 		return -ENOSYS;
 	}
 }
@@ -1919,8 +1905,6 @@ qla24xx_bsg_request(struct fc_bsg_job *bsg_job)
 		ql_dbg(ql_dbg_user, vha, 0x709f,
 		    "BSG: ISP abort active/needed -- cmd=%d.\n",
 		    bsg_job->request->msgcode);
-		bsg_job->reply->result = (DID_ERROR << 16);
-		bsg_job->job_done(bsg_job);
 		return -EBUSY;
 	}
 
@@ -1943,7 +1927,6 @@ qla24xx_bsg_request(struct fc_bsg_job *bsg_job)
 	case FC_BSG_RPT_CT:
 	default:
 		ql_log(ql_log_warn, vha, 0x705a, "Unsupported BSG request.\n");
-		bsg_job->reply->result = ret;
 		break;
 	}
 	return ret;
-- 
1.7.7

[PATCH 2/5] qla2xxx: Test and clear FCPORT_UPDATE_NEEDED atomically.

[Saurav Kashyap]

From: David Jeffery <djeffery@redhat.com>

When the qla2xxx driver loses access to multiple, remote ports, there is a race
condition which can occur which will keep the request stuck on a scsi request
queue indefinitely.

This bad state occurred do to a race condition with how the FCPORT_UPDATE_NEEDED
bit is set in qla2x00_schedule_rport_del(), and how it is cleared in
qla2x00_do_dpc().  The problem port has its drport pointer set, but it has never
been processed by the driver to inform the fc transport that the port has been
lost.  qla2x00_schedule_rport_del() sets drport, and then sets the
FCPORT_UPDATE_NEEDED bit.  In qla2x00_do_dpc(), the port lists are walked and
any drport pointer is handled and the fc transport informed of the port loss,
then the FCPORT_UPDATE_NEEDED bit is cleared.  This leaves a race where the
dpc thread is processing one port removal, another port removal is marked
with a call to qla2x00_schedule_rport_del(), and the dpc thread clears the
bit for both removals, even though only the first removal was actually
handled.  Until another event occurs to set FCPORT_UPDATE_NEEDED, the later
port removal is never finished and qla2xxx stays in a bad state which causes
requests to become stuck on request queues.

This patch updates the driver to test and clear FCPORT_UPDATE_NEEDED
atomically.  This ensures the port state changes are processed and not lost.

Signed-off-by: David Jeffery <djeffery@redhat.com>
Signed-off-by: Chad Dupuis <chad.dupuis@qlogic.com>
Cc: stable@vger.kernel.org
Signed-off-by: Saurav Kashyap <saurav.kashyap@qlogic.com>
---
 drivers/scsi/qla2xxx/qla_os.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/scsi/qla2xxx/qla_os.c b/drivers/scsi/qla2xxx/qla_os.c
index d501bf5..a603967 100644
--- a/drivers/scsi/qla2xxx/qla_os.c
+++ b/drivers/scsi/qla2xxx/qla_os.c
@@ -4505,9 +4505,9 @@ qla2x00_do_dpc(void *data)
 			    "ISP abort end.\n");
 		}
 
-		if (test_bit(FCPORT_UPDATE_NEEDED, &base_vha->dpc_flags)) {
+		if (test_and_clear_bit(FCPORT_UPDATE_NEEDED,
+		    &base_vha->dpc_flags)) {
 			qla2x00_update_fcports(base_vha);
-			clear_bit(FCPORT_UPDATE_NEEDED, &base_vha->dpc_flags);
 		}
 
 		if (test_bit(SCR_PENDING, &base_vha->dpc_flags)) {
-- 
1.7.7

[PATCH 3/5] qla2xxx: Change in setting UNLOADING flag and FC vports logout sequence while unloading qla2xxx driver.

[Saurav Kashyap]

From: Giridhar Malavali <giridhar.malavali@qlogic.com>

Signed-off-by: Giridhar Malavali <giridhar.malavali@qlogic.com>
Signed-off-by: Saurav Kashyap <saurav.kashyap@qlogic.com>
---
 drivers/scsi/qla2xxx/qla_attr.c |    3 +--
 drivers/scsi/qla2xxx/qla_os.c   |    3 +--
 2 files changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/scsi/qla2xxx/qla_attr.c b/drivers/scsi/qla2xxx/qla_attr.c
index 1c28215..83d7984 100644
--- a/drivers/scsi/qla2xxx/qla_attr.c
+++ b/drivers/scsi/qla2xxx/qla_attr.c
@@ -1615,8 +1615,7 @@ qla2x00_terminate_rport_io(struct fc_rport *rport)
 	 * At this point all fcport's software-states are cleared.  Perform any
 	 * final cleanup of firmware resources (PCBs and XCBs).
 	 */
-	if (fcport->loop_id != FC_NO_LOOP_ID &&
-	    !test_bit(UNLOADING, &fcport->vha->dpc_flags)) {
+	if (fcport->loop_id != FC_NO_LOOP_ID) {
 		if (IS_FWI2_CAPABLE(fcport->vha->hw))
 			fcport->vha->hw->isp_ops->fabric_logout(fcport->vha,
 			    fcport->loop_id, fcport->d_id.b.domain,
diff --git a/drivers/scsi/qla2xxx/qla_os.c b/drivers/scsi/qla2xxx/qla_os.c
index a603967..f4b1fc8 100644
--- a/drivers/scsi/qla2xxx/qla_os.c
+++ b/drivers/scsi/qla2xxx/qla_os.c
@@ -2755,6 +2755,7 @@ qla2x00_remove_one(struct pci_dev *pdev)
 
 	ha->flags.host_shutting_down = 1;
 
+	set_bit(UNLOADING, &base_vha->dpc_flags);
 	mutex_lock(&ha->vport_lock);
 	while (ha->cur_vport_count) {
 		struct Scsi_Host *scsi_host;
@@ -2784,8 +2785,6 @@ qla2x00_remove_one(struct pci_dev *pdev)
 			    "Error while clearing DRV-Presence.\n");
 	}
 
-	set_bit(UNLOADING, &base_vha->dpc_flags);
-
 	qla2x00_abort_all_cmds(base_vha, DID_NO_CONNECT << 16);
 
 	qla2x00_dfs_remove(base_vha);
-- 
1.7.7

[PATCH 4/5] qla2xxx: Free rsp_data even on error in qla2x00_process_loopback()

[Saurav Kashyap]

From: Steve Hodgson <steve@purestorage.com>

Signed-off-by: Steve Hodgson <steve@purestorage.com>
Signed-off-by: Armen Baloyan <armen.baloyan@qlogic.com>
Signed-off-by: Saurav Kashyap <saurav.kashyap@qlogic.com>
---
 drivers/scsi/qla2xxx/qla_bsg.c |    7 ++++---
 1 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/drivers/scsi/qla2xxx/qla_bsg.c b/drivers/scsi/qla2xxx/qla_bsg.c
index 05520be..9f34ded 100644
--- a/drivers/scsi/qla2xxx/qla_bsg.c
+++ b/drivers/scsi/qla2xxx/qla_bsg.c
@@ -743,7 +743,7 @@ qla2x00_process_loopback(struct fc_bsg_job *bsg_job)
 				ql_log(ql_log_warn, vha, 0x701f,
 				    "Get port config failed.\n");
 				rval = -EPERM;
-				goto done_free_dma_req;
+				goto done_free_dma_rsp;
 			}
 
 			ql_dbg(ql_dbg_user, vha, 0x70c0,
@@ -762,7 +762,7 @@ qla2x00_process_loopback(struct fc_bsg_job *bsg_job)
 
 			if (rval) {
 				rval = -EPERM;
-				goto done_free_dma_req;
+				goto done_free_dma_rsp;
 			}
 
 			type = "FC_BSG_HST_VENDOR_LOOPBACK";
@@ -795,7 +795,7 @@ qla2x00_process_loopback(struct fc_bsg_job *bsg_job)
 				}
 
 				rval = -EIO;
-				goto done_free_dma_req;
+				goto done_free_dma_rsp;
 			}
 		} else {
 			type = "FC_BSG_HST_VENDOR_LOOPBACK";
@@ -830,6 +830,7 @@ qla2x00_process_loopback(struct fc_bsg_job *bsg_job)
 	fw_sts_ptr += sizeof(response);
 	*fw_sts_ptr = command_sent;
 
+done_free_dma_rsp:
 	dma_free_coherent(&ha->pdev->dev, rsp_data_len,
 		rsp_data, rsp_data_dma);
 done_free_dma_req:
-- 
1.7.7

[PATCH 5/5] qla2xxx: Update the driver version to 8.04.00.08-k.

[Saurav Kashyap]

Signed-off-by: Giridhar Malavali <giridhar.malavali@qlogic.com>
Signed-off-by: Saurav Kashyap <saurav.kashyap@qlogic.com>
---
 drivers/scsi/qla2xxx/qla_version.h |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/scsi/qla2xxx/qla_version.h b/drivers/scsi/qla2xxx/qla_version.h
index cfe934e..49697ca 100644
--- a/drivers/scsi/qla2xxx/qla_version.h
+++ b/drivers/scsi/qla2xxx/qla_version.h
@@ -7,7 +7,7 @@
 /*
  * Driver version
  */
-#define QLA2XXX_VERSION      "8.04.00.07-k"
+#define QLA2XXX_VERSION      "8.04.00.08-k"
 
 #define QLA_DRIVER_MAJOR_VER	8
 #define QLA_DRIVER_MINOR_VER	4
-- 
1.7.7

Re: [PATCH 2/5] qla2xxx: Test and clear FCPORT_UPDATE_NEEDED atomically.

[Saurav Kashyap]

Hi,
This needs to be copied to stable, added in cc.

Thanks,
~Saurav



>From: David Jeffery <djeffery@redhat.com>
>
>When the qla2xxx driver loses access to multiple, remote ports, there is
>a race
>condition which can occur which will keep the request stuck on a scsi
>request
>queue indefinitely.
>
>This bad state occurred do to a race condition with how the
>FCPORT_UPDATE_NEEDED
>bit is set in qla2x00_schedule_rport_del(), and how it is cleared in
>qla2x00_do_dpc().  The problem port has its drport pointer set, but it
>has never
>been processed by the driver to inform the fc transport that the port has
>been
>lost.  qla2x00_schedule_rport_del() sets drport, and then sets the
>FCPORT_UPDATE_NEEDED bit.  In qla2x00_do_dpc(), the port lists are walked
>and
>any drport pointer is handled and the fc transport informed of the port
>loss,
>then the FCPORT_UPDATE_NEEDED bit is cleared.  This leaves a race where
>the
>dpc thread is processing one port removal, another port removal is marked
>with a call to qla2x00_schedule_rport_del(), and the dpc thread clears the
>bit for both removals, even though only the first removal was actually
>handled.  Until another event occurs to set FCPORT_UPDATE_NEEDED, the
>later
>port removal is never finished and qla2xxx stays in a bad state which
>causes
>requests to become stuck on request queues.
>
>This patch updates the driver to test and clear FCPORT_UPDATE_NEEDED
>atomically.  This ensures the port state changes are processed and not
>lost.
>
>Signed-off-by: David Jeffery <djeffery@redhat.com>
>Signed-off-by: Chad Dupuis <chad.dupuis@qlogic.com>
>Cc: stable@vger.kernel.org
>Signed-off-by: Saurav Kashyap <saurav.kashyap@qlogic.com>
>---
> drivers/scsi/qla2xxx/qla_os.c |    4 ++--
> 1 files changed, 2 insertions(+), 2 deletions(-)
>
>diff --git a/drivers/scsi/qla2xxx/qla_os.c b/drivers/scsi/qla2xxx/qla_os.c
>index d501bf5..a603967 100644
>--- a/drivers/scsi/qla2xxx/qla_os.c
>+++ b/drivers/scsi/qla2xxx/qla_os.c
>@@ -4505,9 +4505,9 @@ qla2x00_do_dpc(void *data)
>                           "ISP abort end.\n");
>               }
>
>-              if (test_bit(FCPORT_UPDATE_NEEDED, &base_vha->dpc_flags)) {
>+              if (test_and_clear_bit(FCPORT_UPDATE_NEEDED,
>+                  &base_vha->dpc_flags)) {
>                       qla2x00_update_fcports(base_vha);
>-                      clear_bit(FCPORT_UPDATE_NEEDED, &base_vha->dpc_flags);
>               }
>
>               if (test_bit(SCR_PENDING, &base_vha->dpc_flags)) {
>--
>1.7.7
>


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