Re: [PATCH] mutex: fix deadlock injection

From: Dave Airlie
Date: Tue Aug 06 2013 - 20:06:08 EST

On Tue, Jul 30, 2013 at 6:41 PM, Peter Zijlstra <peterz@xxxxxxxxxxxxx> wrote:
> On Tue, Jul 30, 2013 at 10:13:41AM +0200, Maarten Lankhorst wrote:
>> The check needs to be for > 1, because ctx->acquired is already incremented.
>> This will prevent ww_mutex_lock_slow from returning -EDEADLK and not locking
>> the mutex. It caused a lot of false gpu lockups on radeon with
>> CONFIG_DEBUG_WW_MUTEX_SLOWPATH=y because a function that shouldn't be able
>> to return -EDEADLK did.
>> Cc: Alex Deucher <alexander.deucher@xxxxxxx>
>> Signed-off-by: Maarten Lankhorst <maarten.lankhorst@xxxxxxxxxxxxx>

Should this be merged via Ingo? or will I queue it in my -fixes?

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