[Intel-gfx] [PATCH] drm/i915: Fix execlist cleanup bug

[John Harrison]

This is an old version. I have a new and improved patch that also fixes 
the legacy ring buffer case (which was equally broken). Will post shortly...

On 30/10/2014 15:30, Dave Gordon wrote:
> From: John Harrison <John.C.Harrison at Intel.com>
>
> Check whether each engine exists before trying to clean up the
> corresponding logical ring.
>
> Change-Id: I31b1ed941824db2d6bd7233360dbce05671979a8
> Signed-off-by: Dave Gordon <david.s.gordon at intel.com>
> ---
>   drivers/gpu/drm/i915/intel_lrc.c |   12 ++++++++----
>   1 file changed, 8 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/intel_lrc.c b/drivers/gpu/drm/i915/intel_lrc.c
> index cd74e5c..7a7d30a 100644
> --- a/drivers/gpu/drm/i915/intel_lrc.c
> +++ b/drivers/gpu/drm/i915/intel_lrc.c
> @@ -1444,13 +1444,17 @@ int intel_logical_rings_init(struct drm_device *dev)
>   	return 0;
>   
>   cleanup_bsd2_ring:
> -	intel_logical_ring_cleanup(&dev_priv->ring[VCS2]);
> +	if (HAS_BSD2(dev))
> +		intel_logical_ring_cleanup(&dev_priv->ring[VCS2]);
>   cleanup_vebox_ring:
> -	intel_logical_ring_cleanup(&dev_priv->ring[VECS]);
> +	if (HAS_VEBOX(dev))
> +		intel_logical_ring_cleanup(&dev_priv->ring[VECS]);
>   cleanup_blt_ring:
> -	intel_logical_ring_cleanup(&dev_priv->ring[BCS]);
> +	if (HAS_BLT(dev))
> +		intel_logical_ring_cleanup(&dev_priv->ring[BCS]);
>   cleanup_bsd_ring:
> -	intel_logical_ring_cleanup(&dev_priv->ring[VCS]);
> +	if (HAS_BSD(dev))
> +		intel_logical_ring_cleanup(&dev_priv->ring[VCS]);
>   cleanup_render_ring:
>   	intel_logical_ring_cleanup(&dev_priv->ring[RCS]);
>