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drm/amdgpu: max_pde_used usage should be under protect 

Need to take the lock when accessing this.

Signed-off-by: monk.liu <monk.liu@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Jammy Zhou <jammy.zhou@amd.com>
This commit is contained in:
monk.liu 2015-05-26 10:22:41 +08:00 committed by Alex Deucher
parent ca95261325
commit 3d5a08c114
1 changed files with 5 additions and 1 deletions
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6
drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
View File

@ -90,10 +90,13 @@ struct amdgpu_bo_list_entry *amdgpu_vm_get_bos(struct amdgpu_device *adev,
struct amdgpu_bo_list_entry *list;
unsigned i, idx;
mutex_lock(&vm->mutex);
list = drm_malloc_ab(vm->max_pde_used + 2,
sizeof(struct amdgpu_bo_list_entry));
if (!list)
if (!list) {
mutex_unlock(&vm->mutex);
return NULL;
}
/* add the vm page table to the list */
list[0].robj = vm->page_directory;
@ -116,6 +119,7 @@ struct amdgpu_bo_list_entry *amdgpu_vm_get_bos(struct amdgpu_device *adev,
list[idx].tv.shared = true;
list_add(&list[idx++].tv.head, head);
}
mutex_unlock(&vm->mutex);
return list;
}