Re: [PATCH -v1] acpi: Fix possible recursive locking in hwregs.c

From: Rakib Mullick
Date: Thu Nov 03 2011 - 13:01:32 EST


On 11/3/11, Lin Ming <ming.m.lin@xxxxxxxxx> wrote:
> On Thu, 2011-11-03 at 18:48 +0800, Rakib Mullick wrote:
>> Calling pm-suspend might trigger a recursive lock in it's code path. In
>> function acpi_hw_clear_acpi_status,
>
> As I replied at https://lkml.org/lkml/2011/9/22/6, I still don't think
> there is a recursive lock.
>
> Or do you have a real test case to trigger the recursive lock you
> mentioned?
>
As I said before, recursive lock trigger's on a modified kernel (when
calling pm-suspend), not with the mainline kernel. If you think that,
since it's not happening with original kernel, so we shouldn't go for
fix - that's a different thing, I don't have any argue. But, the issue
is on.

Thanks,
Rakib
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