[SCSI] lpfc 8.1.2: Fix panic caused by HBA resets and target side cable pulls

Fix panic caused by HBA resets and target side cable pulls
Signed-off-by: NJamie Wellnitz <Jamie.Wellnitz@emulex.com>
Signed-off-by: NJames Bottomley <James.Bottomley@SteelEye.com>

drivers/scsi/lpfc/lpfc_scsi.c

 /*******************************************************************
  * This file is part of the Emulex Linux Device Driver for         *
  * Fibre Channel Host Bus Adapters.                                *
- * Copyright (C) 2004-2005 Emulex.  All rights reserved.           *
+ * Copyright (C) 2004-2006 Emulex.  All rights reserved.           *
  * EMULEX and SLI are trademarks of Emulex.                        *
  * www.emulex.com                                                  *
  * Portions Copyright (C) 2004-2005 Christoph Hellwig              *
@@ -467,7 +467,7 @@ lpfc_scsi_cmd_iocb_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pIocbIn,
 	sdev = cmd->device;
 	cmd->scsi_done(cmd);
 
-	if (!result &&
+	if (!result && pnode != NULL &&
 	   ((jiffies - pnode->last_ramp_up_time) >
 		LPFC_Q_RAMP_UP_INTERVAL * HZ) &&
 	   ((jiffies - pnode->last_q_full_time) >
@@ -495,7 +495,7 @@ lpfc_scsi_cmd_iocb_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pIocbIn,
 	 * Check for queue full.  If the lun is reporting queue full, then
 	 * back off the lun queue depth to prevent target overloads.
 	 */
-	if (result == SAM_STAT_TASK_SET_FULL) {
+	if (result == SAM_STAT_TASK_SET_FULL && pnode != NULL) {
 		pnode->last_q_full_time = jiffies;
 
 		shost_for_each_device(tmp_sdev, sdev->host) {