drm/amdgpu: add spin lock to protect freed list in vm (v2)

there is a protection fault about freed list when OCL test.
add a spin lock to protect it.

v2: drop changes in vm_fini

Signed-off-by: JimQu <jim.qu@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
index 670fefb56945..5a5f04d0902d 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
@@ -956,6 +956,8 @@ struct amdgpu_vm {
         struct amdgpu_vm_id     ids[AMDGPU_MAX_RINGS];
         /* for interval tree */
         spinlock_t              it_lock;
+        /* protecting freed */
+        spinlock_t              freed_lock;
 };
 
 struct amdgpu_vm_manager {