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Re: [PATCH] rt2800pci: handle spurious interrupts

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On Wed, Nov 16, 2011 at 11:52 AM, Ivo Van Doorn <ivdoorn@xxxxxxxxx> wrote:
> On Wed, Nov 16, 2011 at 11:46 AM, Helmut Schaa
> <helmut.schaa@xxxxxxxxxxxxxx> wrote:
>> On Wed, Nov 16, 2011 at 11:09 AM, Stanislaw Gruszka <sgruszka@xxxxxxxxxx> wrote:
>>> +       /*
>>> +        * Some devices can generate interrupts with empty CSR register, we
>>> +        * "handle" such irq's to prevent interrupt controller treat them as
>>> +        * spurious interrupts and disable irq line.
>>> +        */
>>>        if (!reg)
>>> -               return IRQ_NONE;
>>> +               return IRQ_HANDLED;
>>
>> What if this interrupt belongs to a different device on a shared interrupt line?
>> In case reg is zero we can't be sure our device generated this interrupt, right?
>
> In the bugzilla report  Stanislaw indicated that even when rt2800pci
> indicates IRQ_HANDLED,
> all other drivers on the same interruptline will still get the interrupt event.

Ah, ok. Should be fine with me then ...

Thanks.
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