drm/amd/amdgpu: Check tbo resource pointer

From Asad Kamal
4dfec5f5501a27e0a0da00e136d65ef9011ded4c in linux-6.6.y/6.6.50
6cd2b872643bb29bba01a8ac739138db7bd79007 in mainline linux

diff --git a/sys/dev/pci/drm/amd/amdgpu/amdgpu_device.c b/sys/dev/pci/drm/amd/amdgpu/amdgpu_device.c
index 2c2bb60..55095fd 100644 (file)
--- a/sys/dev/pci/drm/amd/amdgpu/amdgpu_device.c
+++ b/sys/dev/pci/drm/amd/amdgpu/amdgpu_device.c
@@ -4605,7 +4605,8 @@ static int amdgpu_device_recover_vram(struct amdgpu_device *adev)
                shadow = vmbo->shadow;
 
                /* No need to recover an evicted BO */
-               if (shadow->tbo.resource->mem_type != TTM_PL_TT ||
+               if (!shadow->tbo.resource ||
+                   shadow->tbo.resource->mem_type != TTM_PL_TT ||
                    shadow->tbo.resource->start == AMDGPU_BO_INVALID_OFFSET ||
                    shadow->parent->tbo.resource->mem_type != TTM_PL_VRAM)
                        continue;