Problem: When device goes into suspend and unplugged during it then all HW programming during resume fails leading to a bad SW during pci remove handling which follows. Because device is first resumed and only later removed we cannot rely on drm_dev_enter/exit here. Fix: Use a flag we use for PCIe error recovery to avoid accessing registres. This allows to successfully complete pm resume sequence and finish pci remove. Signed-off-by: Andrey Grodzovsky <andrey.grodzovsky@xxxxxxx> --- drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c index db21af5e84ed..04fb4e74fb20 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c @@ -1522,6 +1522,10 @@ static int amdgpu_pmops_resume(struct device *dev) struct amdgpu_device *adev = drm_to_adev(drm_dev); int r; + /* Avoids registers access if device is physically gone */ + if (!pci_device_is_present(adev->pdev)) + adev->no_hw_access = true; + r = amdgpu_device_resume(drm_dev, true); if (amdgpu_acpi_is_s0ix_active(adev)) adev->in_s0ix = false; -- 2.25.1
