Re: [PATCH] drm/radeon: fix autosuspend cleanup during teardown

[Alex Deucher]

Applied.  Thanks!

On Sat, Aug 8, 2026 at 10:20 AM Guangshuo Li <lgs201920130244@xxxxxxxxx> wrote:
>
> 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: 10ebc0bc0934 ("drm/radeon: add runtime PM support (v2)")
> Cc: stable@xxxxxxxxxxxxxxx
> Signed-off-by: Guangshuo Li <lgs201920130244@xxxxxxxxx>
> ---
>  drivers/gpu/drm/radeon/radeon_kms.c | 1 +
>  1 file changed, 1 insertion(+)
>
> diff --git a/drivers/gpu/drm/radeon/radeon_kms.c b/drivers/gpu/drm/radeon/radeon_kms.c
> index dc43fd790a9c..4a99c09f4164 100644
> --- a/drivers/gpu/drm/radeon/radeon_kms.c
> +++ b/drivers/gpu/drm/radeon/radeon_kms.c
> @@ -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);
> --
> 2.43.0
>