Re: [PATCH] drm/i915/selftests: Take an explicit ref for rq->batch

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Chris Wilson <chris@xxxxxxxxxxxxxxxxxx> writes:

> Since we are peeking into the batch object of the request, it is
> beholden on us to hold a reference to it.
>
> Closes: https://gitlab.freedesktop.org/drm/intel/issues/1634
> Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>

Follow the mon^H^H^H request.

Reviewed-by: Mika Kuoppala <mika.kuoppala@xxxxxxxxxxxxxxx>

> ---
>  drivers/gpu/drm/i915/gt/selftest_lrc.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/i915/gt/selftest_lrc.c b/drivers/gpu/drm/i915/gt/selftest_lrc.c
> index 57db3d0ffaf2..616d03506c2c 100644
> --- a/drivers/gpu/drm/i915/gt/selftest_lrc.c
> +++ b/drivers/gpu/drm/i915/gt/selftest_lrc.c
> @@ -2655,7 +2655,7 @@ static int create_gang(struct intel_engine_cs *engine,
>  	if (IS_ERR(rq))
>  		goto err_obj;
>  
> -	rq->batch = vma;
> +	rq->batch = i915_vma_get(vma);
>  	i915_request_get(rq);
>  
>  	i915_vma_lock(vma);
> @@ -2679,6 +2679,7 @@ static int create_gang(struct intel_engine_cs *engine,
>  	return 0;
>  
>  err_rq:
> +	i915_vma_put(rq->batch);
>  	i915_request_put(rq);
>  err_obj:
>  	i915_gem_object_put(obj);
> @@ -2775,6 +2776,7 @@ static int live_preempt_gang(void *arg)
>  				err = -ETIME;
>  			}
>  
> +			i915_vma_put(rq->batch);
>  			i915_request_put(rq);
>  			rq = n;
>  		}
> -- 
> 2.20.1
>
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