From: Li Yang <leoli@freescale.com>
To: Kumar Gala <galak@kernel.crashing.org>
Cc: "<dayu@datangmobile.cn>" <dayu@datangmobile.cn>,
linux-kernel@vger.kernel.org, linuxppc-dev@ozlabs.org
Subject: Re: [PATCH] fix the interrupt loss problem on powerpc IPIC (2.6.23)
Date: Tue, 17 Feb 2009 22:38:18 +0800 [thread overview]
Message-ID: <2a27d3730902170638h43724c03k6b50843158842e1e@mail.gmail.com> (raw)
In-Reply-To: <76C7F485-EF75-4B83-B673-564E6243C7C6@kernel.crashing.org>
On Tue, Feb 17, 2009 at 10:12 PM, Kumar Gala <galak@kernel.crashing.org> wrote:
>
> On Feb 17, 2009, at 6:44 AM, <dayu@datangmobile.cn> <dayu@datangmobile.cn>
> wrote:
>
>> From: Da Yu <dayu@datangmobile.cn>
>> 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@datangmobile.cn>
>> ---
>
> 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
next prev parent reply other threads:[~2009-02-17 14:38 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-02-17 12:44 dayu
2009-02-17 14:12 ` Kumar Gala
2009-02-17 14:32 ` Josh Boyer
2009-02-17 14:55 ` Li Yang
2009-02-17 14:38 ` Li Yang [this message]
2009-02-17 14:43 ` Kumar Gala
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