On Mon, 2011-08-15 at 16:33 +0530, radhika bhaskaran wrote:
>
> For my debugging purpose i tried to register two isr's on the same
> number IRQ no in the same driver. But the isr which is registerd
> first is being hit.
>
Since the kernel is monolithic is doesn't really matter where your ISR
functions are defined and where these handlers are assigned an IRQ line.
>
> The other isr funciton which is registered after the first isr is
> never executed.
>
>
> Any more suggestions?
>
Yes, does yours ISR function handlers look if they generated the interrupt and
if not respond accordingly?
If your device didn't raised the interrupt then they have to return IRQ_NONE.
If your hardware raised the interrupt then you have to do the processing and
return IRQ_HANDLED.
So you have to do something like this:
static irqreturn_t my_interrupt(int irq, void *data)
{
int result;
struct my_device *my_dev = data;
result = check_interrupt_raised(my_dev);
if (!result)
return IRQ_NONE;
process_interrupt(my_dev);
return IRQ_HANDLED;
}
Hope it helps,
Javier Martinez Canillas
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