[PATCH] crypto: sl3516: fix autosuspend cleanup during teardown

[Linus Walleij]

On Sat, Aug 8, 2026 at 11:26 AM Guangshuo Li <lgs201920130244 at gmail.com> wrote:

> sl3516_ce_pm_init() calls pm_runtime_use_autosuspend(), but the
> autosuspend setting is not undone if pm_runtime_set_suspended() fails
> or when runtime PM is later torn down by sl3516_ce_pm_exit().
>
> 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 cleanup, this reference is not dropped and usage_count remains
> unbalanced.
>
> Undo the autosuspend setting when pm_runtime_set_suspended() fails and
> in sl3516_ce_pm_exit() before disabling runtime PM.
>
> This issue was found by manual code inspection.
>
> Fixes: 46c5338db7bd ("crypto: sl3516 - Add sl3516 crypto engine")
> Cc: stable at vger.kernel.org
> Signed-off-by: Guangshuo Li <lgs201920130244 at gmail.com>

Looks right to me!
Reviewed-by: Linus Walleij <linusw at kernel.org>

Yours,
Linus Walleij