@@ -1282,25 +1282,28 @@ i915_gem_sw_finish_ioctl(struct drm_device *dev, void *data,
{
struct drm_i915_gem_sw_finish *args = data;
struct drm_i915_gem_object *obj;
- int ret = 0;
-
- ret = i915_mutex_lock_interruptible(dev);
- if (ret)
- return ret;
+ int ret;
obj = to_intel_bo(drm_gem_object_lookup(dev, file, args->handle));
- if (&obj->base == NULL) {
- ret = -ENOENT;
- goto unlock;
- }
+ if (&obj->base == NULL)
+ return -ENOENT;
/* Pinned buffers may be scanout, so flush the cache */
- if (obj->pin_display)
+ if (obj->pin_display) {
+ ret = i915_mutex_lock_interruptible(dev);
+ if (ret)
+ goto unref;
+
i915_gem_object_flush_cpu_write_domain(obj);
- drm_gem_object_unreference(&obj->base);
-unlock:
- mutex_unlock(&dev->struct_mutex);
+ drm_gem_object_unreference(&obj->base);
+ mutex_unlock(&dev->struct_mutex);
+ } else {
+ ret = 0;
+unref:
+ drm_gem_object_unreference_unlocked(&obj->base);
+ }
+
return ret;
}
We only need to take the struct_mutex if the object is pinned to the display engine and so requires checking for clflush. (The race with userspace pinning the object to a framebuffer is irrelevant.) v2: Use access once for compiler hints (or not as it is a bitfield) Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: Daniel Vetter <daniel.vetter@ffwll.ch> --- drivers/gpu/drm/i915/i915_gem.c | 29 ++++++++++++++++------------- 1 file changed, 16 insertions(+), 13 deletions(-)