Commit 6ce62d8b authored by Lukas Wunner's avatar Lukas Wunner Committed by Daniel Vetter

drm/amdgpu: Forbid runtime pm on driver unload

The PCI core calls pm_runtime_forbid() on device probe in pci_pm_init(),
making this the default state when amdgpu is loaded.
amdgpu_driver_load_kms() therefore calls pm_runtime_allow(), but there's
no pm_runtime_forbid() in amdgpu_driver_unload_kms() to balance it. Add
it so that we leave the device in the same state that we found it.

This isn't a bug, it's just good housekeeping. When amdgpu is first
loaded with runpm=1, then unloaded and loaded again with runpm=0,
pm_runtime_forbid() will be called from amdgpu_pmops_runtime_idle() or
amdgpu_pmops_runtime_suspend(), so the behaviour is correct. If there
ever is a third party driver for AMD cards, this commit avoids that it
has to clean up behind amdgpu.

Cc: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: default avatarLukas Wunner <lukas@wunner.de>
Acked-by: default avatarAlex Deucher <alexander.deucher@amd.com>
Signed-off-by: default avatarDaniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/ccd4f7208acbd7761364418fc34f7849acbb4597.1465392124.git.lukas@wunner.de
parent c9c9bbd7
...@@ -62,6 +62,7 @@ int amdgpu_driver_unload_kms(struct drm_device *dev) ...@@ -62,6 +62,7 @@ int amdgpu_driver_unload_kms(struct drm_device *dev)
if (amdgpu_device_is_px(dev)) { if (amdgpu_device_is_px(dev)) {
pm_runtime_get_sync(dev->dev); pm_runtime_get_sync(dev->dev);
pm_runtime_forbid(dev->dev);
} }
amdgpu_amdkfd_device_fini(adev); amdgpu_amdkfd_device_fini(adev);
......
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