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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>
This commit is contained in:
Eric Anholt 2008-11-26 13:58:13 -08:00 committed by Dave Airlie
parent ac94a962b2
commit 0235439232
1 changed files with 11 additions and 0 deletions
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11
drivers/gpu/drm/i915/i915_gem.c
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@ -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);