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scsi: qla2xxx: Avoid that Coverity complains about dereferencing a NULL rport pointer

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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>
This commit is contained in:
Bart Van Assche 2019-04-17 14:44:19 -07:00 committed by Martin K. Petersen
parent dafbe56f6e
commit 2dbb02fd49
1 changed files with 3 additions and 2 deletions
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5
drivers/scsi/qla2xxx/qla_os.c
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@ -859,7 +859,8 @@ 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;
}
@ -982,7 +983,7 @@ 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,