From: "Xiangliang.Yu" Date: Thu, 21 Sep 2017 10:19:49 +0800 Subject: drm/amdgpu: Fix driver reloading failure Git-commit: fd4495e57cd2594098493a0e5b6beccae8cbf47b Patch-mainline: v4.15-rc1 References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166 SRIOV doesn't implement PMC capability of PCIe, so it can't update power state by reading PMC register. Currently, amdgpu driver doesn't disable pci device when removing driver, the enable_cnt of pci device will not be decrease to 0. When reloading driver, pci_enable_device will do nothing as enable_cnt is not zero. And power state will not be updated as PMC is not support. So current_state of pci device is not D0 state and pci_enable_msi return fail. Add pci_disable_device when remmoving driver to fix the issue. Signed-off-by: Xiangliang.Yu Acked-by: Alex Deucher Signed-off-by: Alex Deucher Acked-by: Petr Tesarik --- drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c | 2 ++ 1 file changed, 2 insertions(+) --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c @@ -609,6 +609,8 @@ amdgpu_pci_remove(struct pci_dev *pdev) drm_dev_unregister(dev); drm_dev_unref(dev); + pci_disable_device(pdev); + pci_set_drvdata(pdev, NULL); } static void