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drm/ttm: make the device list mutex static 

This way it can protect the whole BO global state.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Junwei Zhang <Jerry.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Christian König 2018-10-19 14:09:24 +02:00 committed by Alex Deucher
parent 27eb1fa913
commit 56b3d20413
2 changed files with 9 additions and 6 deletions
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14
drivers/gpu/drm/ttm/ttm_bo.c
View File

@ -45,6 +45,11 @@
static void ttm_bo_global_kobj_release(struct kobject *kobj);
/**
* ttm_global_mutex - protecting the global BO state
*/
DEFINE_MUTEX(ttm_global_mutex);
static struct attribute ttm_bo_count = {
.name = "bo_count",
.mode = S_IRUGO
@ -1539,7 +1544,6 @@ int ttm_bo_global_init(struct ttm_bo_global *glob)
if (ret)
return ret;
mutex_init(&glob->device_list_mutex);
spin_lock_init(&glob->lru_lock);
glob->mem_glob = &ttm_mem_glob;
glob->mem_glob->bo_glob = glob;
@ -1587,9 +1591,9 @@ int ttm_bo_device_release(struct ttm_bo_device *bdev)
}
}
mutex_lock(&glob->device_list_mutex);
mutex_lock(&ttm_global_mutex);
list_del(&bdev->device_list);
mutex_unlock(&glob->device_list_mutex);
mutex_unlock(&ttm_global_mutex);
cancel_delayed_work_sync(&bdev->wq);
@ -1636,9 +1640,9 @@ int ttm_bo_device_init(struct ttm_bo_device *bdev,
bdev->dev_mapping = mapping;
bdev->glob = glob;
bdev->need_dma32 = need_dma32;
mutex_lock(&glob->device_list_mutex);
mutex_lock(&ttm_global_mutex);
list_add_tail(&bdev->device_list, &glob->device_list);
mutex_unlock(&glob->device_list_mutex);
mutex_unlock(&ttm_global_mutex);
return 0;
out_no_sys:

1
include/drm/ttm/ttm_bo_driver.h
View File

@ -407,7 +407,6 @@ struct ttm_bo_global {
struct kobject kobj;
struct ttm_mem_global *mem_glob;
struct page *dummy_read_page;
struct mutex device_list_mutex;
spinlock_t lru_lock;
/**