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

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Signed-off-by: Steven Toth <stoth@kernellabs.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Steven Toth 2009-05-11 22:16:05 -03:00 committed by Mauro Carvalho Chehab
parent f4a6adf1e5
commit d888ea03a0
1 changed files with 6 additions and 0 deletions
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6
drivers/media/video/saa7164/saa7164-core.c
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@ -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.