diff mbox

ath9k: Fix NULL pointer dereference on early irq

Message ID 1411021841-12683-1-git-send-email-Wojciech.Dubowik@neratec.com (mailing list archive)
State Not Applicable, archived
Headers show

Commit Message

Wojciech Dubowik Sept. 18, 2014, 6:30 a.m. UTC 
The ah struct might not have been initialized when
interrupt comes so check for it.

Signed-off-by: Wojciech Dubowik <Wojciech.Dubowik@neratec.com>
---
 drivers/net/wireless/ath/ath9k/main.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff mbox

Patch

diff --git a/drivers/net/wireless/ath/ath9k/main.c b/drivers/net/wireless/ath/ath9k/main.c
index 3e485f7..fbf23ac 100644
--- a/drivers/net/wireless/ath/ath9k/main.c
+++ b/drivers/net/wireless/ath/ath9k/main.c
@@ -504,7 +504,7 @@  irqreturn_t ath_isr(int irq, void *dev)
 	 * touch anything. Note this can happen early
 	 * on if the IRQ is shared.
 	 */
-	if (test_bit(ATH_OP_INVALID, &common->op_flags))
+	if (!ah || test_bit(ATH_OP_INVALID, &common->op_flags))
 		return IRQ_NONE;
 
 	/* shared irq, not for us */