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authorEric Anholt <eric@anholt.net>2008-11-26 13:58:13 -0800
committerDave Airlie <airlied@redhat.com>2008-12-04 11:24:47 +1000
commit0235439232cb6f8a54f8976aa8330c1c98ebad0b (patch)
tree15acdd628efe011f127d7b8ecc2fb65ce4131705
parentac94a962b24a88ea5d00f4697550d9982f300751 (diff)
downloadop-kernel-dev-0235439232cb6f8a54f8976aa8330c1c98ebad0b.zip
op-kernel-dev-0235439232cb6f8a54f8976aa8330c1c98ebad0b.tar.gz
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 <eric@anholt.net> Signed-off-by: Dave Airlie <airlied@redhat.com>
-rw-r--r--drivers/gpu/drm/i915/i915_gem.c11
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 174c0c3..3fde82b 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);
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