From 025fc3a4d57c2e584da0ae1cbde5be3b558936db Mon Sep 17 00:00:00 2001
From: Himanshu Madhani <hmadhani@redhat.com>
Date: Thu, 1 Aug 2019 15:55:48 -0400
Subject: [PATCH 088/124] [scsi] scsi: qla2xxx: Avoid that Coverity complains
 about dereferencing a NULL rport pointer

Message-id: <20190801155618.12650-89-hmadhani@redhat.com>
Patchwork-id: 267865
O-Subject: [RHEL 7.8 e-stor PATCH 088/118] scsi: qla2xxx: Avoid that Coverity complains about dereferencing a NULL rport pointer
Bugzilla: 1729270
RH-Acked-by: Jarod Wilson <jarod@redhat.com>
RH-Acked-by: Tony Camuso <tcamuso@redhat.com>

From: Bart Van Assche <bvanassche@acm.org>

Bugzilla 1729270

Since Coverity cannot know that rport != NULL in qla2xxx_queuecommand() and
since there is code in that function that dereferences the rport pointer,
modify qla2xxx_queuecommand() such that it fails SCSI commands if rport ==
NULL.

Cc: Himanshu Madhani <hmadhani@marvell.com>
Cc: Giridhar Malavali <gmalavali@marvell.com>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Acked-by: Himanshu Madhani <hmadhani@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
(cherry picked from commit 2dbb02fd495c9b2e41ba37d6fec2aa713d328788)
Signed-off-by: Himanshu Madhani <hmadhani@redhat.com>
Signed-off-by: Jan Stancek <jstancek@redhat.com>
---
 drivers/scsi/qla2xxx/qla_os.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/scsi/qla2xxx/qla_os.c b/drivers/scsi/qla2xxx/qla_os.c
index 11fa33fde436..83d06db7e9fa 100644
--- a/drivers/scsi/qla2xxx/qla_os.c
+++ b/drivers/scsi/qla2xxx/qla_os.c
@@ -906,7 +906,8 @@ qla2xxx_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *cmd)
 	uint32_t tag;
 	uint16_t hwq;
 
-	if (unlikely(test_bit(UNLOADING, &base_vha->dpc_flags))) {
+	if (unlikely(test_bit(UNLOADING, &base_vha->dpc_flags)) ||
+	    WARN_ON_ONCE(!rport)) {
 		cmd->result = DID_NO_CONNECT << 16;
 		goto qc24_fail_command;
 	}
@@ -1033,7 +1034,7 @@ qla2xxx_mqueuecommand(struct Scsi_Host *host, struct scsi_cmnd *cmd,
 	srb_t *sp;
 	int rval;
 
-	rval = fc_remote_port_chkready(rport);
+	rval = rport ? fc_remote_port_chkready(rport) : FC_PORTSTATE_OFFLINE;
 	if (rval) {
 		cmd->result = rval;
 		ql_dbg(ql_dbg_io + ql_dbg_verbose, vha, 0x3076,
-- 
2.13.6