[PATCH] scsi: qedf: Add check for bdt_info

[Jiasheng Jiang]

Add a check for "bdt_info". Otherwise, if one of the allocations
for "cmgr->io_bdt_pool[i]" fails, "bdt_info->bd_tbl" will cause a NULL
pointer dereference.

Fixes: 61d8658b4a43 ("scsi: qedf: Add QLogic FastLinQ offload FCoE driver framework.")
Signed-off-by: Jiasheng Jiang <jiashengjiangcool@xxxxxxxxx>
---
 drivers/scsi/qedf/qedf_io.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/scsi/qedf/qedf_io.c b/drivers/scsi/qedf/qedf_io.c
index fcfc3bed02c6..cab16a3e2a30 100644
--- a/drivers/scsi/qedf/qedf_io.c
+++ b/drivers/scsi/qedf/qedf_io.c
@@ -125,7 +125,7 @@ void qedf_cmd_mgr_free(struct qedf_cmd_mgr *cmgr)
 	bd_tbl_sz = QEDF_MAX_BDS_PER_CMD * sizeof(struct scsi_sge);
 	for (i = 0; i < num_ios; i++) {
 		bdt_info = cmgr->io_bdt_pool[i];
-		if (bdt_info->bd_tbl) {
+		if (bdt_info && bdt_info->bd_tbl) {
 			dma_free_coherent(&qedf->pdev->dev, bd_tbl_sz,
 			    bdt_info->bd_tbl, bdt_info->bd_tbl_dma);
 			bdt_info->bd_tbl = NULL;
-- 
2.25.1