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.c
View File

@@ -458,6 +458,9 @@ static int msm_drm_init(struct device *dev, struct drm_driver *drv)
priv->wq = alloc_ordered_workqueue("msm", 0);
INIT_WORK(&priv->free_work, msm_gem_free_work);
init_llist_head(&priv->free_list);
INIT_LIST_HEAD(&priv->inactive_list);
drm_mode_config_init(ddev);
@@ -1026,7 +1029,7 @@ static struct drm_driver msm_driver = {
.irq_uninstall = msm_irq_uninstall,
.enable_vblank = msm_enable_vblank,
.disable_vblank = msm_disable_vblank,
.gem_free_object = msm_gem_free_object,
.gem_free_object_unlocked = msm_gem_free_object,
.gem_vm_ops = &vm_ops,
.dumb_create = msm_gem_dumb_create,
.dumb_map_offset = msm_gem_dumb_map_offset,