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scsi: qla2xxx: Fix error handling in qlt_alloc_qfull_cmd() 

The test "if (!cmd)" is not useful because it is guaranteed that cmd !=
NULL.  Instead of testing the cmd pointer, rely on the tag to decide
whether or not command allocation failed.

Cc: Himanshu Madhani <hmadhani@marvell.com>
Cc: Giridhar Malavali <gmalavali@marvell.com>
Fixes: 33e7997755 ("qla2xxx: Add support for QFull throttling and Term Exchange retry") # v3.18.
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 14:44:27 -07:00 committed by Martin K. Petersen
parent e65449aa23
commit c04466c171
1 changed files with 2 additions and 5 deletions
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7
drivers/scsi/qla2xxx/qla_target.c
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@ -5481,11 +5481,7 @@ qlt_alloc_qfull_cmd(struct scsi_qla_host *vha,
se_sess = sess->se_sess;
tag = sbitmap_queue_get(&se_sess->sess_tag_pool, &cpu);
if (tag < 0)
return;
cmd = &((struct qla_tgt_cmd *)se_sess->sess_cmd_map)[tag];
if (!cmd) {
if (tag < 0) {
ql_dbg(ql_dbg_io, vha, 0x3009,
"qla_target(%d): %s: Allocation of cmd failed\n",
vha->vp_idx, __func__);
@ -5500,6 +5496,7 @@ qlt_alloc_qfull_cmd(struct scsi_qla_host *vha,
return;
}
cmd = &((struct qla_tgt_cmd *)se_sess->sess_cmd_map)[tag];
memset(cmd, 0, sizeof(struct qla_tgt_cmd));
qlt_incr_num_pend_cmds(vha);