[PATCH 03/20] scsi: lpfc: don't dereference dma_buf->iocbq before null check

[jsmart2021]

From: James Smart <jsmart2...@gmail.com>

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

dma_buf->iocbq is being dereferenced immediately before it is
being null checked, so we have a potential null pointer dereference
bug.  Fix this by only dereferencing it only once we have passed
a null check on the pointer.

Detected by CoverityScan, CID#1411652 ("Dereference before null check")

Signed-off-by: Colin Ian King <colin.k...@canonical.com>
Signed-off-by: James Smart <james.sm...@broadcom.com>
---
 drivers/scsi/lpfc/lpfc_mem.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/scsi/lpfc/lpfc_mem.c b/drivers/scsi/lpfc/lpfc_mem.c
index c61d8d6..5986c79 100644
--- a/drivers/scsi/lpfc/lpfc_mem.c
+++ b/drivers/scsi/lpfc/lpfc_mem.c
@@ -646,7 +646,6 @@ lpfc_sli4_nvmet_alloc(struct lpfc_hba *phba)
        }
 
        dma_buf->iocbq = lpfc_sli_get_iocbq(phba);
-       dma_buf->iocbq->iocb_flag = LPFC_IO_NVMET;
        if (!dma_buf->iocbq) {
                kfree(dma_buf->context);
                pci_pool_free(phba->lpfc_drb_pool, dma_buf->dbuf.virt,
@@ -658,6 +657,7 @@ lpfc_sli4_nvmet_alloc(struct lpfc_hba *phba)
                                "2621 Ran out of nvmet iocb/WQEs\n");
                return NULL;
        }
+       dma_buf->iocbq->iocb_flag = LPFC_IO_NVMET;
        nvmewqe = dma_buf->iocbq;
        wqe = (union lpfc_wqe128 *)&nvmewqe->wqe;
        /* Initialize WQE */
-- 
2.5.0