From: Eric Anholt Date: Wed, 26 Nov 2008 21:58:13 +0000 (-0800) Subject: drm/i915: Return error in i915_gem_set_to_gtt_domain if we're not in the GTT. X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=0235439232cb6f8a54f8976aa8330c1c98ebad0b;p=GitHub%2Fexynos8895%2Fandroid_kernel_samsung_universal8895.git drm/i915: Return error in i915_gem_set_to_gtt_domain if we're not in the GTT. It's only for flushing caches appropriately for GTT access, not for actually getting it there. Prevents potential smashing of cpu read/write domains on unbound objects. Signed-off-by: Eric Anholt Signed-off-by: Dave Airlie --- diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c index 174c0c3ba0b0..3fde82be014f 100644 --- a/drivers/gpu/drm/i915/i915_gem.c +++ b/drivers/gpu/drm/i915/i915_gem.c @@ -435,6 +435,13 @@ i915_gem_set_domain_ioctl(struct drm_device *dev, void *data, #endif if (read_domains & I915_GEM_DOMAIN_GTT) { ret = i915_gem_object_set_to_gtt_domain(obj, write_domain != 0); + + /* Silently promote "you're not bound, there was nothing to do" + * to success, since the client was just asking us to + * make sure everything was done. + */ + if (ret == -EINVAL) + ret = 0; } else { ret = i915_gem_object_set_to_cpu_domain(obj, write_domain != 0); } @@ -1304,6 +1311,10 @@ i915_gem_object_set_to_gtt_domain(struct drm_gem_object *obj, int write) struct drm_i915_gem_object *obj_priv = obj->driver_private; int ret; + /* Not valid to be called on unbound objects. */ + if (obj_priv->gtt_space == NULL) + return -EINVAL; + i915_gem_object_flush_gpu_write_domain(obj); /* Wait on any GPU rendering and flushing to occur. */ ret = i915_gem_object_wait_rendering(obj);