Commit 65a8d4e1 authored by Andreas Herrmann's avatar Andreas Herrmann Committed by James Bottomley
Browse files

[SCSI] zfcp: fix: reopen port only if link-test fails 



From: Maxim Shchetynin <maxim@de.ibm.com>

Reopen a remote port only if the link-test fails. This avoids that a
port is unnecessarily reopened.

Signed-off-by: default avatarAndreas Herrmann <aherrman@de.ibm.com>
Signed-off-by: default avatarJames Bottomley <James.Bottomley@SteelEye.com>
parent 22753fa5

drivers/s390/scsi/zfcp_fsf.c

+4 −15
Original line number Diff line number Diff line
@@ -1267,8 +1267,7 @@ zfcp_fsf_abort_fcp_command_handler(struct zfcp_fsf_req *new_fsf_req) 
		case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:

			debug_text_event(new_fsf_req->adapter->erp_dbf, 1,

					 "fsf_sq_ltest");

			/* reopening link to port */

			zfcp_erp_port_reopen(unit->port, 0);

			zfcp_test_link(unit->port);

			new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;

			break;

		case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
@@ -3125,7 +3124,7 @@ zfcp_fsf_open_unit_handler(struct zfcp_fsf_req *fsf_req) 
			/* Re-establish link to port */

			debug_text_event(adapter->erp_dbf, 1,

					 "fsf_sq_ltest");

			zfcp_erp_port_reopen(unit->port, 0);

			zfcp_test_link(unit->port);

			fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;

			break;

		case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
@@ -3368,7 +3367,7 @@ zfcp_fsf_close_unit_handler(struct zfcp_fsf_req *fsf_req) 
			/* re-establish link to port */

			debug_text_event(fsf_req->adapter->erp_dbf, 1,

					 "fsf_sq_ltest");

			zfcp_erp_port_reopen(unit->port, 0);

			zfcp_test_link(unit->port);

			fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;

			break;

		case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
@@ -3931,12 +3930,7 @@ zfcp_fsf_send_fcp_command_handler(struct zfcp_fsf_req *fsf_req) 
			/* re-establish link to port */

			debug_text_event(fsf_req->adapter->erp_dbf, 1,

					 "fsf_sq_ltest");

			zfcp_erp_port_reopen(unit->port, 0);

			zfcp_cmd_dbf_event_fsf(

				"sqltest",

				fsf_req,

				&header->fsf_status_qual,

				sizeof (union fsf_status_qual));

 			zfcp_test_link(unit->port);

			fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;

			break;

		case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
@@ -3944,11 +3938,6 @@ zfcp_fsf_send_fcp_command_handler(struct zfcp_fsf_req *fsf_req) 
			/* let scsi stack deal with retries and escalation */

			debug_text_event(fsf_req->adapter->erp_dbf, 1,

					 "fsf_sq_ulp");

			zfcp_cmd_dbf_event_fsf(

				"sqdeperp",

				fsf_req,

				&header->fsf_status_qual,

				sizeof (union fsf_status_qual));

			fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;

			break;

		default: