[Intel-gfx] [PATCH] drm/i915/guc: Check for wedged before doing stuff

[Tvrtko Ursulin]

On 15/12/2021 22:45, John.C.Harrison at Intel.com wrote:
> From: John Harrison <John.C.Harrison at Intel.com>
> 
> A fault injection probe test hit a BUG_ON in a GuC error path. It
> showed that the GuC code could potentially attempt to do many things
> when the device is actually wedged. So, add a check in to prevent that.
> 
> Signed-off-by: John Harrison <John.C.Harrison at Intel.com>
> ---
>   drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c | 3 ++-
>   1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
> index 97311119da6f..88f002c4d41b 100644
> --- a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
> +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
> @@ -1350,7 +1350,8 @@ submission_disabled(struct intel_guc *guc)
>   	struct i915_sched_engine * const sched_engine = guc->sched_engine;
>   
>   	return unlikely(!sched_engine ||
> -			!__tasklet_is_enabled(&sched_engine->tasklet));
> +			!__tasklet_is_enabled(&sched_engine->tasklet) ||
> +			test_bit(I915_WEDGED, &guc_to_gt(guc)->reset.flags));

Or intel_gt_is_wedged ?

Regards,

Tvrtko

>   }
>   
>   static void disable_submission(struct intel_guc *guc)
>