diff options
| author | Karolina Stolarek <karolina.stolarek@intel.com> | 2023-10-16 14:15:25 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-11-08 17:26:47 +0100 |
| commit | e39440c3268b11c6a496ff9f59758efde72e0769 (patch) | |
| tree | e9e1e0723eeacbdc0f46f1d96d1d4ac0f001c828 | |
| parent | aade33d3d9bb9758e0f06d99132ac95c67f0da62 (diff) | |
| download | aa-e39440c3268b11c6a496ff9f59758efde72e0769.tar.gz | |
drm/ttm: Reorder sys manager cleanup step
[ Upstream commit 3b401e30c249849d803de6c332dad2a595a58658 ]
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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | drivers/gpu/drm/ttm/ttm_device.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/gpu/drm/ttm/ttm_device.c b/drivers/gpu/drm/ttm/ttm_device.c index 2df59b3c2ea16..291cdd893fc50 100644 --- a/drivers/gpu/drm/ttm/ttm_device.c +++ b/drivers/gpu/drm/ttm/ttm_device.c @@ -234,10 +234,6 @@ 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); @@ -247,6 +243,10 @@ void ttm_device_fini(struct ttm_device *bdev) if (ttm_bo_delayed_delete(bdev, true)) pr_debug("Delayed destroy list was clean\n"); + 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])) |