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drm/radeon: Don't leak runtime pm ref on driver unload

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radeon_driver_load_kms() calls pm_runtime_put_autosuspend() if
radeon_is_px(dev), but radeon_driver_unload_kms() calls
pm_runtime_get_sync() unconditionally. We therefore leak a runtime pm
ref whenever radeon is unloaded on a non-PX machine or if runpm=0. The
GPU will subsequently never runtime suspend after loading radeon again.

Fix by taking the runtime pm ref under the same condition that it was
released on driver load.

Fixes: 10ebc0bc0934 ("drm/radeon: add runtime PM support (v2)")
Cc: Dave Airlie <airlied@redhat.com>
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/aaf71106c042126817aeca8b8e54ed468ab61ef7.1465392124.git.lukas@wunner.de
This commit is contained in:
Lukas Wunner 2016-06-08 18:47:27 +02:00 committed by Daniel Vetter
parent 55c868a322
commit 19de659cb7
1 changed files with 3 additions and 1 deletions
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4
drivers/gpu/drm/radeon/radeon_kms.c
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@ -63,7 +63,9 @@ int radeon_driver_unload_kms(struct drm_device *dev)
if (rdev->rmmio == NULL)
goto done_free;
pm_runtime_get_sync(dev->dev);
if (radeon_is_px(dev)) {
pm_runtime_get_sync(dev->dev);
}
radeon_kfd_device_fini(rdev);