[Intel-gfx] [PATCH] drm/i915: Wait for all fences before installing an exclusive clflush fence

[Mika Kuoppala]

Chris Wilson <chris at chris-wilson.co.uk> writes:

> Ensure that before we overwrite the reservation_object with our
> exclusive fence for the pending clflush operation, that we do wait upon
> all the fences in the current reservation_object.
>
> Fixes: 57822dc6b9cf ("drm/i915: Perform object clflushing asynchronously")
> Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
> Cc: Joonas Lahtinen <joonas.lahtinen at linux.intel.com>
> Cc: Matthew Auld <matthew.auld at intel.com>

Reviewed-by: Mika Kuoppala <mika.kuoppala at intel.com>

> ---
>  drivers/gpu/drm/i915/i915_gem_clflush.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/i915/i915_gem_clflush.c b/drivers/gpu/drm/i915/i915_gem_clflush.c
> index d925fb582ba7..ffd01e02fe94 100644
> --- a/drivers/gpu/drm/i915/i915_gem_clflush.c
> +++ b/drivers/gpu/drm/i915/i915_gem_clflush.c
> @@ -168,7 +168,7 @@ void i915_gem_clflush_object(struct drm_i915_gem_object *obj,
>  
>  		i915_sw_fence_await_reservation(&clflush->wait,
>  						obj->resv, NULL,
> -						false, I915_FENCE_TIMEOUT,
> +						true, I915_FENCE_TIMEOUT,
>  						GFP_KERNEL);
>  
>  		reservation_object_lock(obj->resv, NULL);
> -- 
> 2.11.0
>
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