Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-11-26 22:21:42 +00:00
Code Issues Packages Projects Releases Wiki Activity

drm/ttm: Reorder sys manager cleanup step

Browse Source 
With the current cleanup flow, we could trigger a NULL pointer
dereference if there is a delayed destruction of a BO with a
system resource that gets executed on drain_workqueue() call,
as we attempt to free a resource using an already released
resource manager.

Remove the device from the device list and drain its workqueue
before releasing the system domain manager in ttm_device_fini().

Signed-off-by: Karolina Stolarek <karolina.stolarek@intel.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20231016121525.2237838-1-karolina.stolarek@intel.com
Signed-off-by: Christian König <christian.koenig@amd.com>
This commit is contained in:
Karolina Stolarek 2023-10-16 14:15:25 +02:00 committed by Christian König
parent 4366faf433
commit 3b401e30c2
1 changed files with 4 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
drivers/gpu/drm/ttm/ttm_device.c
View File

@ -232,10 +232,6 @@ void ttm_device_fini(struct ttm_device *bdev)
struct ttm_resource_manager *man;
unsigned i;
man = ttm_manager_type(bdev, TTM_PL_SYSTEM);
ttm_resource_manager_set_used(man, false);
ttm_set_driver_manager(bdev, TTM_PL_SYSTEM, NULL);
mutex_lock(&ttm_global_mutex);
list_del(&bdev->device_list);
mutex_unlock(&ttm_global_mutex);
@ -243,6 +239,10 @@ void ttm_device_fini(struct ttm_device *bdev)
drain_workqueue(bdev->wq);
destroy_workqueue(bdev->wq);
man = ttm_manager_type(bdev, TTM_PL_SYSTEM);
ttm_resource_manager_set_used(man, false);
ttm_set_driver_manager(bdev, TTM_PL_SYSTEM, NULL);
spin_lock(&bdev->lru_lock);
for (i = 0; i < TTM_MAX_BO_PRIORITY; ++i)
if (list_empty(&man->lru[0]))