[SCSI] zfcp: fix erp timeout cleanup for port open requests

If an open port fsf request times out (in erp) the
corresponding erp_action member of the fsf
request need to set to NULL. If the port structure
will be removed later-on there will be still a
reference in the fsf request to the non existing
erp_action otherwise.

Signed-off-by: Martin Petermann <martin.petermann@de.ibm.com>
Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

drivers/s390/scsi/zfcp_erp.c

@@ -472,6 +472,7 @@ static void zfcp_erp_strategy_check_fsfreq(struct zfcp_erp_action *act)
 				   ZFCP_STATUS_ERP_TIMEDOUT)) {
 			act->fsf_req->status |= ZFCP_STATUS_FSFREQ_DISMISSED;
 			zfcp_rec_dbf_event_action(142, act);
+			act->fsf_req->erp_action = NULL;
 		}
 		if (act->status & ZFCP_STATUS_ERP_TIMEDOUT)
 			zfcp_rec_dbf_event_action(143, act);