i965/miptree: Check tex image allocation failures

allowing graceful failure instead of crash on assert later on.

This can be hit, for example, on SNB when trying to allocate
8kx8k CUBE_MAP against isl: x-tiled buffer size becomes
2421161984 exceeding the maximum of 1 << 31 == 2147483648.

Another way to hit this on SNB is with multisampling of over
64-bit formats.

Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
Signed-off-by: Topi Pohjolainen <topi.pohjolainen@intel.com>

diff --git a/src/mesa/drivers/dri/i965/intel_tex.c b/src/mesa/drivers/dri/i965/intel_tex.c
index 82e25fc..7ce2ceb 100644 (file)
--- a/src/mesa/drivers/dri/i965/intel_tex.c
+++ b/src/mesa/drivers/dri/i965/intel_tex.c
@@ -95,6 +95,8 @@ intel_alloc_texture_image_buffer(struct gl_context *ctx,
       intel_image->mt = intel_miptree_create_for_teximage(brw, intel_texobj,
                                                           intel_image,
                                                           1 /* samples */);
+      if (!intel_image->mt)
+         return false;
 
       /* Even if the object currently has a mipmap tree associated
        * with it, this one is a more likely candidate to represent the