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Commit eef4670e authored by Daniele Ceraolo Spurio's avatar Daniele Ceraolo Spurio
Browse files

drm/i915/query: fix subslice length 



We dump the info as an array of u8, so we want to know the length
in number of bytes. Current code is still safe because the
variable we use BITS_PER_TYPE on is a u8.

Cc: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Signed-off-by: default avatarDaniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Reviewed-by: default avatarTvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: default avatarLionel Landwerlin <lionel.g.landwerlin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20181109004013.34394-1-daniele.ceraolospurio@intel.com
parent cf303a41

drivers/gpu/drm/i915/i915_query.c

+1 −2
Original line number Diff line number Diff line
@@ -27,8 +27,7 @@ static int query_topology_info(struct drm_i915_private *dev_priv, 


	slice_length = sizeof(sseu->slice_mask);

	subslice_length = sseu->max_slices *

		DIV_ROUND_UP(sseu->max_subslices,

			     BITS_PER_TYPE(sseu->subslice_mask[0]));

		DIV_ROUND_UP(sseu->max_subslices, BITS_PER_BYTE);

	eu_length = sseu->max_slices * sseu->max_subslices *

		DIV_ROUND_UP(sseu->max_eus_per_subslice, BITS_PER_BYTE);