Mesa (master): i965: Check result of make_surface() for intel_miptree_create_for_bo

[Kenneth Graunke]

Module: Mesa
Branch: master
Commit: f28c2e225668ed7977b301100140f4f7e7bf55e6
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=f28c2e225668ed7977b301100140f4f7e7bf55e6

Author: Chris Wilson <chris at chris-wilson.co.uk>
Date:   Mon Jul 31 10:22:44 2017 +0100

i965: Check result of make_surface() for intel_miptree_create_for_bo

Since make_surface() can fail, if the format isn't support by hw or
simlar error, we need to check the result before dereferencing it.

Reviewed-by: Kenneth Graunke <kenneth at whitecape.org>

---

 src/mesa/drivers/dri/i965/intel_mipmap_tree.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/mesa/drivers/dri/i965/intel_mipmap_tree.c b/src/mesa/drivers/dri/i965/intel_mipmap_tree.c
index 628d80c0ff..daa49f9922 100644
--- a/src/mesa/drivers/dri/i965/intel_mipmap_tree.c
+++ b/src/mesa/drivers/dri/i965/intel_mipmap_tree.c
@@ -792,6 +792,8 @@ intel_miptree_create_for_bo(struct brw_context *brw,
                         0, 0, width, height, depth, 1, ISL_TILING_Y0_BIT,
                         ISL_SURF_USAGE_DEPTH_BIT | ISL_SURF_USAGE_TEXTURE_BIT,
                         BO_ALLOC_FOR_RENDER, pitch, bo);
+      if (!mt)
+         return NULL;
 
       brw_bo_reference(bo);