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| author | Lukas Wunner <lukas@wunner.de> | 2016-06-08 19:47:27 +0300 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2016-06-24 09:49:32 +0300 |
| commit | 6ce62d8b6f5683375d71a0bb51d60bf71615af27 (patch) | |
| tree | 60d98e604c3da34fdc95e99a84b7923cd6f6edad /drivers | |
| parent | c9c9bbd754e5f342977b32a328849cc0d9c15c93 (diff) | |
| download | linux-6ce62d8b6f5683375d71a0bb51d60bf71615af27.tar.xz | |
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: Lukas Wunner <lukas@wunner.de>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/ccd4f7208acbd7761364418fc34f7849acbb4597.1465392124.git.lukas@wunner.de
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c index 0db692ef3d25..38a28d137f1d 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c @@ -62,6 +62,7 @@ int amdgpu_driver_unload_kms(struct drm_device *dev) if (amdgpu_device_is_px(dev)) { pm_runtime_get_sync(dev->dev); + pm_runtime_forbid(dev->dev); } amdgpu_amdkfd_device_fini(adev); |