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i965: map_gtt: check mapping address before adding offset 

The NULL check might fail if offset isn't 0.

CID: 971379
Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Reviewed-by: Anuj Phogat <anuj.phogat@gmail.com>
This commit is contained in:
Lionel Landwerlin 2017-07-13 16:08:34 +01:00
parent a25a533458
commit b02d136b5e
1 changed files with 3 additions and 1 deletions
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4
src/mesa/drivers/dri/i965/intel_mipmap_tree.c
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@ -2965,11 +2965,13 @@ intel_miptree_map_gtt(struct brw_context *brw,
y /= bh;
x /= bw;
base = intel_miptree_map_raw(brw, mt, map->mode) + mt->offset;
base = intel_miptree_map_raw(brw, mt, map->mode);
if (base == NULL)
map->ptr = NULL;
else {
base += mt->offset;
/* Note that in the case of cube maps, the caller must have passed the
* slice number referencing the face.
*/