drm/amdgpu: skip amdgpu_device_cache_pci_state under sriov

Under sriov, host driver will save and restore vf pci cfg space during
reset. And during device init, under sriov, pci_restore_state happens after
fullaccess released, and it can have race condition with mmio protection
enable from host side leading to missing interrupts.

So skip amdgpu_device_cache_pci_state for sriov.

Signed-off-by: Victor Zhao <[email protected]>
Acked-by: Lijo Lazar <[email protected]>
Signed-off-by: Alex Deucher <[email protected]>

Author: vizhao

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

@@ -6451,6 +6451,9 @@ bool amdgpu_device_cache_pci_state(struct pci_dev *pdev)
 	struct amdgpu_device *adev = drm_to_adev(dev);
 	int r;
 
+	if (amdgpu_sriov_vf(adev))
+		return false;
+
 	r = pci_save_state(pdev);
 	if (!r) {
 		kfree(adev->pci_state);