bna: Check for NULL before deref in bnad_cb_tx_cleanup
Reported-by: Jiri Slaby <jirislaby@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/bna/bnad.c b/drivers/net/bna/bnad.c
index 8158fb9..e380c0e 100644
--- a/drivers/net/bna/bnad.c
+++ b/drivers/net/bna/bnad.c
@@ -867,11 +867,12 @@
static void
bnad_cb_tx_cleanup(struct bnad *bnad, struct bna_tcb *tcb)
{
- struct bnad_unmap_q *unmap_q = tcb->unmap_q;
+ struct bnad_unmap_q *unmap_q;
if (!tcb || (!tcb->unmap_q))
return;
+ unmap_q = tcb->unmap_q;
if (!unmap_q->unmap_array)
return;