drm/amdgpu: WARN when freeing kernel memory during suspend

When buffers are freed during suspend there is no guarantee that
they can be re-allocated during resume.

The PSP subsystem seems to be quite buggy regarding this, so add
a WARN_ON() to point out those bugs.

Signed-off-by: Christian König <[email protected]>
Reviewed-by: Alex Deucher <[email protected]>
Tested-by: Guilherme G. Piccoli <[email protected]>
Signed-off-by: Alex Deucher <[email protected]>

Author: ChristianKoenigAMD

drivers/gpu/drm/amd/amdgpu/amdgpu_object.c

@@ -422,6 +422,8 @@ void amdgpu_bo_free_kernel(struct amdgpu_bo **bo, u64 *gpu_addr,
 	if (*bo == NULL)
 		return;
 
+	WARN_ON(amdgpu_ttm_adev((*bo)->tbo.bdev)->in_suspend);
+
 	if (likely(amdgpu_bo_reserve(*bo, true) == 0)) {
 		if (cpu_addr)
 			amdgpu_bo_kunmap(*bo);