Re: [PATCH] fix the interrupt loss problem on powerpc IPIC (2.6.23)

[Li Yang]

On Tue, Feb 17, 2009 at 10:12 PM, Kumar Gala <galak@xxxxxxxxxxxxxxxxxxx> wrote:
>
> On Feb 17, 2009, at 6:44 AM, <dayu@xxxxxxxxxxxxxxx> <dayu@xxxxxxxxxxxxxxx>
> wrote:
>
>> From: Da Yu <dayu@xxxxxxxxxxxxxxx>
>> Date: Tue, 17 Feb 2009 19:58:20 +0800
>> Subject: [PATCH] fix the interrupt loss problem on powerpc IPIC (2.6.23)
>>
>> Signed-off-by: Da Yu <dayu@xxxxxxxxxxxxxxx>
>> ---
>
> Please provide a bit more description as to why this fixes the issue.

The pending register is write 1 clear.  If there are more than one
external interrupts pending at the same time, acking the first
interrupt will also clear other interrupt pending bits.  That will
cause loss of interrupt.

- Leo
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/