V4L/DVB (12929): SAA7164: OOPS avoidance during interrupt handling

Signed-off-by: Steven Toth <stoth@kernellabs.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/drivers/media/video/saa7164/saa7164-core.c b/drivers/media/video/saa7164/saa7164-core.c
index 968ecd4ad495..15ea90731ba7 100644
--- a/drivers/media/video/saa7164/saa7164-core.c
+++ b/drivers/media/video/saa7164/saa7164-core.c
@@ -123,6 +123,12 @@ static irqreturn_t saa7164_irq(int irq, void *dev_id)
         u32 intstat[INT_SIZE/4];
         int i, handled = 0, bit;
 
+        if (dev == 0) {
+                printk(KERN_ERR "%s() No device specified\n", __func__);
+                handled = 0;
+                goto out;
+        }
+
         /* Check that the hardware is accessable. If the status bytes are
          * 0xFF then the device is not accessable, the the IRQ belongs
          * to another driver.