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 <christian.koenig@amd.com>
Reviewed-by: Alex Deucher <alexdeucher@amd.com>
Tested-by: Guilherme G. Piccoli <gpiccoli@igalia.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
index 2df55cc7e07f615f66a632d2236c50bebfa82beb..3393c1a6a0ff113954540e3a321eed6fb1f280fa 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
+++ b/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);