Re: [PATCH v6 4/4] ASoC: wm8994: drain delayed works on remove and probe error

[Charles Keepax <ckeepax@opensource.cirrus.com>]

On Mon, Nov 02, 2026 at 04:53:40PM +0000, Tristan Madani wrote:
> From: Tristan Madani <tristan@talencesecurity.com>
> 
> wm8994_component_probe() schedules several delayed works to handle jack
> detection and microphone status polling.  If the component is removed or
> probe fails after these works are scheduled, they can execute after
> resources are freed.
> 
> Cancel all pending delayed works in the error and removal paths.  Guard
> cancel_delayed_work_sync(&wm8994->mic_work) with a type check because
> INIT_DELAYED_WORK for mic_work only runs in the WM8994 and WM1811 code
> paths.
> 
> Cancel mic_work before and after jackdet_bootstrap because the two can
> re-arm each other: wm1811_mic_work() can re-arm jackdet_bootstrap
> through the DAPM power-up chain (force-enabling MICBIAS2 triggers
> clk_sys_event which queues jackdet_bootstrap), and
> wm1811_jackdet_bootstrap() detects a jack and ultimately queues
> mic_work.  The second mic_work cancel catches any re-arm from a
> jackdet_bootstrap handler that was in flight during the first cancel.
> 
> Fixes: 99af79dff5a6 ("ASoC: wm8994: Ensure we get a notification on startup for jackdet")
> Cc: stable@vger.kernel.org
> Signed-off-by: Tristan Madani <tristan@talencesecurity.com>
> ---

Reviewed-by: Charles Keepax <ckeepax@opensource.cirrus.com>

Thanks,
Charles