Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-12-17 08:31:39 +00:00
Code Issues Packages Projects Releases Wiki Activity

drm/cirrus: Don't grab dev->struct_mutex for in mmap offset ioctl

Browse Source 
Since David Herrmann's mmap vma manager rework we don't need to grab
dev->struct_mutex any more to prevent races when looking up the mmap
offset. Drop it and instead don't forget to use the unref_unlocked
variant (since the drm core still cares).

Reviewed-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
This commit is contained in:
Daniel Vetter 2015-07-09 23:32:40 +02:00
parent bf89209a6d
commit 6cc56234fe
1 changed files with 4 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
drivers/gpu/drm/cirrus/cirrus_main.c
View File

@ -293,25 +293,18 @@ cirrus_dumb_mmap_offset(struct drm_file *file,
uint64_t *offset)
{
struct drm_gem_object *obj;
int ret;
struct cirrus_bo *bo;
mutex_lock(&dev->struct_mutex);
obj = drm_gem_object_lookup(dev, file, handle);
if (obj == NULL) {
ret = -ENOENT;
goto out_unlock;
}
if (obj == NULL)
return -ENOENT;
bo = gem_to_cirrus_bo(obj);
*offset = cirrus_bo_mmap_offset(bo);
drm_gem_object_unreference(obj);
ret = 0;
out_unlock:
mutex_unlock(&dev->struct_mutex);
return ret;
drm_gem_object_unreference_unlocked(obj);
return 0;
}
bool cirrus_check_framebuffer(struct cirrus_device *cdev, int width, int height,