Re: [PATCH] dmaengine: qcom-bam-dma: fix autosuspend cleanup during removal

[Bartosz Golaszewski]

On Sat, 8 Aug 2026 13:06:42 +0200, Guangshuo Li
<lgs201920130244@xxxxxxxxx> said:
> bam_dma_probe() calls pm_runtime_use_autosuspend(), but
> bam_dma_remove() does not call the matching
> pm_runtime_dont_use_autosuspend() when removing the device.
>
> 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 and usage_count remains
> unbalanced.
>
> Add the missing pm_runtime_dont_use_autosuspend() call before forcing
> the device into runtime suspend during removal.
>
> This issue was found by manual code inspection.
>
> Fixes: 7d2545599f5b ("dmaengine: qcom-bam-dma: Add pm_runtime support")
> Cc: stable@xxxxxxxxxxxxxxx
> Signed-off-by: Guangshuo Li <lgs201920130244@xxxxxxxxx>
> ---

Reviewed-by: Bartosz Golaszewski <bartosz.golaszewski@xxxxxxxxxxxxxxxx>