UbiquitousOS
/
OpenCloudOS-Kernel
mirror of https://gitee.com/OpenCloudOS/OpenCloudOS-Kernel.git
11
0
Fork 0
Code Issues Projects Releases Wiki Activity

drm/i915: Do an unlocked wait before set-cache-level ioctl 

Since a change in cache level is likely to trigger an unbind, avoid
waiting under the mutex by preemptively doing an unlocked wait.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: http://patchwork.freedesktop.org/patch/msgid/20170119082211.21257-1-chris@chris-wilson.co.uk
Reviewed-by: Mika Kuoppala <mika.kuoppala@intel.com>
This commit is contained in:
Chris Wilson 2017-01-19 08:22:10 +00:00
parent 3139b4a3a2
commit d65415df07
1 changed files with 19 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

29
drivers/gpu/drm/i915/i915_gem.c
View File

@ -3397,7 +3397,7 @@ int i915_gem_set_caching_ioctl(struct drm_device *dev, void *data,
struct drm_i915_gem_caching *args = data;
struct drm_i915_gem_object *obj;
enum i915_cache_level level;
int ret;
int ret = 0;
switch (args->caching) {
case I915_CACHING_NONE:
@ -3422,20 +3422,29 @@ int i915_gem_set_caching_ioctl(struct drm_device *dev, void *data,
return -EINVAL;
}
obj = i915_gem_object_lookup(file, args->handle);
if (!obj)
return -ENOENT;
if (obj->cache_level == level)
goto out;
ret = i915_gem_object_wait(obj,
I915_WAIT_INTERRUPTIBLE,
MAX_SCHEDULE_TIMEOUT,
to_rps_client(file));
if (ret)
goto out;
ret = i915_mutex_lock_interruptible(dev);
if (ret)
return ret;
obj = i915_gem_object_lookup(file, args->handle);
if (!obj) {
ret = -ENOENT;
goto unlock;
}
goto out;
ret = i915_gem_object_set_cache_level(obj, level);
i915_gem_object_put(obj);
unlock:
mutex_unlock(&dev->struct_mutex);
out:
i915_gem_object_put(obj);
return ret;
}