From: Victor Zhao <[email protected]> [ Upstream commit afe260df55ac280cd56306248cb6d8a6b0db095c ]
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]> Signed-off-by: Sasha Levin <[email protected]> --- drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c index bcacf2e35eba0..62a9e714ad69b 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c @@ -6387,6 +6387,9 @@ 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); -- 2.43.0
