Re: [PATCH 2/2] drm/i915: Complete pending resets before get-reset-stats ioctl

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Chris Wilson <chris@xxxxxxxxxxxxxxxxxx> writes:

> [ text/plain ]
> The get-reset-stats ioctls wasn't waiting for a pending reset before
> reporting its statistics, and so was ignoring a hang generated by the
> context that should have been reported against said context.
>
> Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>

This is the fix we are looking for. And so blatantly obvious that
I blame myself for walking past this yesterday.

Testcase: igt/gem_reset_stats/reset_stats-*
Tested-by: Mika Kuoppala <mika.kuoppala@xxxxxxxxx>
Reviewed-by: Mika Kuoppala <mika.kuoppala@xxxxxxxxx>

> ---
>  drivers/gpu/drm/i915/i915_gem_context.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/i915/i915_gem_context.c b/drivers/gpu/drm/i915/i915_gem_context.c
> index f3c76ca6b411..2aedd188473d 100644
> --- a/drivers/gpu/drm/i915/i915_gem_context.c
> +++ b/drivers/gpu/drm/i915/i915_gem_context.c
> @@ -1056,7 +1056,7 @@ int i915_gem_context_reset_stats_ioctl(struct drm_device *dev,
>  	if (args->ctx_id == DEFAULT_CONTEXT_HANDLE && !capable(CAP_SYS_ADMIN))
>  		return -EPERM;
>  
> -	ret = mutex_lock_interruptible(&dev->struct_mutex);
> +	ret = i915_mutex_lock_interruptible(dev);
>  	if (ret)
>  		return ret;
>  
> -- 
> 2.8.1
>
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