scsi: lpfc: sanity check hrq is null before dereferencing it

From: Colin Ian King <colin.king@canonical.com>

The sanity check for hrq should be moved to before the deference
of hrq to ensure we don't perform a null pointer deference.

Detected by CoverityScan, CID#1411650 ("Dereference before null check")

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: James Smart <james.smart@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

diff --git a/drivers/scsi/lpfc/lpfc_sli.c b/drivers/scsi/lpfc/lpfc_sli.c
index d8d8693..562a528 100644 (file)
--- a/drivers/scsi/lpfc/lpfc_sli.c
+++ b/drivers/scsi/lpfc/lpfc_sli.c
@@ -15185,17 +15185,17 @@ lpfc_mrq_create(struct lpfc_hba *phba, struct lpfc_queue **hrqp,
                drq = drqp[idx];
                cq  = cqp[idx];
 
-               if (hrq->entry_count != drq->entry_count) {
-                       status = -EINVAL;
-                       goto out;
-               }
-
                /* sanity check on queue memory */
                if (!hrq || !drq || !cq) {
                        status = -ENODEV;
                        goto out;
                }
 
+               if (hrq->entry_count != drq->entry_count) {
+                       status = -EINVAL;
+                       goto out;
+               }
+
                if (idx == 0) {
                        bf_set(lpfc_mbx_rq_create_num_pages,
                               &rq_create->u.request,