mirrors/linux
2
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git synced 2026-08-30 11:03:07 -04:00
Code Issues Packages Projects Releases Wiki Activity

drm/radeon: fix autosuspend cleanup during teardown

Browse Source 
radeon_driver_load_kms() calls pm_runtime_use_autosuspend() for PX
devices, but radeon_driver_unload_kms() does not call the matching
pm_runtime_dont_use_autosuspend() during teardown.

If the autosuspend delay is set to a negative value while autosuspend
is enabled, the runtime PM core increments usage_count to prevent
runtime suspend. Without calling pm_runtime_dont_use_autosuspend()
during teardown, this reference is not dropped.

The documentation for pm_runtime_use_autosuspend() also notes that it
is important to undo it with pm_runtime_dont_use_autosuspend() at
driver exit time, unless runtime PM was initially enabled with
devm_pm_runtime_enable().

Add the missing pm_runtime_dont_use_autosuspend() call to the driver
unload path.

This issue was found by manual code inspection.

Fixes: 10ebc0bc09 ("drm/radeon: add runtime PM support (v2)")
Signed-off-by: Guangshuo Li <lgs201920130244@gmail.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
(cherry picked from commit 0fdc1ff82e)
Cc: stable@vger.kernel.org
This commit is contained in:
Guangshuo Li
2026-08-08 21:59:42 +08:00
committed by Alex Deucher
parent 47cd311850
commit 587be7a173
1 changed files with 1 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

1
drivers/gpu/drm/radeon/radeon_kms.c
View File

@@ -71,6 +71,7 @@ void radeon_driver_unload_kms(struct drm_device *dev)
if (radeon_is_px(dev)) {
pm_runtime_get_sync(dev->dev);
pm_runtime_forbid(dev->dev);
pm_runtime_dont_use_autosuspend(dev->dev);
}
radeon_acpi_fini(rdev);