In preparation for runtime pm on muxed dual GPU laptops, I've fixed all runtime pm ref leaks I could find in nouveau, radeon and amdgpu.
To ease reviewing, I've pushed this series to GitHub: https://github.com/l1k/linux/commits/drm_runpm_fixes_v1
@Alex Deucher: I do not have an AMD GPU so couldn't test this beyond verifying that it compiles. Please double-check the patches and test them internally at AMD. By the way, I've noticed that nouveau takes a runtime pm ref in ->preclose and releases it in ->postclose. This is missing in radeon and amdgpu. Please check if it is needed.
Thanks,
Lukas
Lukas Wunner (9): drm/nouveau: Don't leak runtime pm ref on driver unload drm/nouveau: Forbid runtime pm on driver unload drm/radeon: Don't leak runtime pm ref on driver unload drm/radeon: Don't leak runtime pm ref on driver load drm/radeon: Forbid runtime pm on driver unload drm/amdgpu: Don't leak runtime pm ref on driver unload drm/amdgpu: Don't leak runtime pm ref on driver load drm/amdgpu: Forbid runtime pm on driver unload drm: Turn off crtc before tearing down its data structure
drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c | 12 +++++++++--- drivers/gpu/drm/drm_crtc.c | 13 ++++++++++++- drivers/gpu/drm/nouveau/nouveau_drm.c | 6 +++++- drivers/gpu/drm/radeon/radeon_device.c | 4 ++++ drivers/gpu/drm/radeon/radeon_kms.c | 5 ++++- 5 files changed, 34 insertions(+), 6 deletions(-)