xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

drm/msm: Implement .gem_free_object_unlocked

Browse Source 
We use a llist and a worker to delay the object cleanup. This avoids
taking mmap_sem and struct_mutex in the wrong order when calling
drm_gem_object_put_unlocked() from drm_gem_mmap().

Fixes lockdep problem with copy_from_user() in msm_ioctl_gem_submit().

Signed-off-by: Kristian H. Kristensen <hoegsberg@chromium.org>
Signed-off-by: Rob Clark <robdclark@chromium.org>
This commit is contained in:
Kristian H. Kristensen
2019-03-20 10:09:08 -07:00
committed by Rob Clark
parent fb076b15d5
commit 48e7f18392
4 changed files with 46 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

5
drivers/gpu/drm/msm/msm_drv.h
View File

@@ -185,6 +185,10 @@ struct msm_drm_private {
/* list of GEM objects: */
struct list_head inactive_list;
/* worker for delayed free of objects: */
struct work_struct free_work;
struct llist_head free_list;
struct workqueue_struct *wq;
unsigned int num_planes;
@@ -325,6 +329,7 @@ void msm_gem_kernel_put(struct drm_gem_object *bo,
struct msm_gem_address_space *aspace, bool locked);
struct drm_gem_object *msm_gem_import(struct drm_device *dev,
struct dma_buf *dmabuf, struct sg_table *sgt);
void msm_gem_free_work(struct work_struct *work);
__printf(2, 3)
void msm_gem_object_set_name(struct drm_gem_object *bo, const char *fmt, ...);