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. Since msix was toggled during pci_restore_state, if mmio protection happens during this time, guest side msix will not be properly programmed and leading to missing interrupts. So skip pci_restore_state during device init. Signed-off-by: Victor Zhao <Victor.Zhao@xxxxxxx> --- drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c index 6c0ff1c2ae4c..52803cd91ef5 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c @@ -4524,7 +4524,7 @@ int amdgpu_device_init(struct amdgpu_device *adev, dev_err(adev->dev, "amdgpu_pmu_init failed\n"); /* Have stored pci confspace at hand for restore in sudden PCI error */ - if (amdgpu_device_cache_pci_state(adev->pdev)) + if (!amdgpu_sriov_vf(adev) && amdgpu_device_cache_pci_state(adev->pdev)) pci_restore_state(pdev); /* if we have > 1 VGA cards, then disable the amdgpu VGA resources */ -- 2.34.1
