[PATCH v9] ASoC: wm8994: drain delayed works on remove and probe error

[Tristan Madani <tristmd@gmail.com>]

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.

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>
---
Changes since v8 [4/4]:
- Guard cancel_delayed_work_sync(&wm8994->mic_work) with type check
  (WM8994 || WM1811), as mic_work is only initialized in those code
  paths — addresses Mark Brown review comment
- Add cleanup to probe error path (err_irq label), not just remove

 sound/soc/codecs/wm8994.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/sound/soc/codecs/wm8994.c b/sound/soc/codecs/wm8994.c
index fc9894975a1d5..30a164796fd48 100644
--- a/sound/soc/codecs/wm8994.c
+++ b/sound/soc/codecs/wm8994.c
@@ -4563,6 +4563,11 @@ static int wm8994_component_probe(struct snd_soc_component *component)
 	wm8994_free_irq(wm8994->wm8994, WM8994_IRQ_FIFOS_ERR, component);
 	wm8994_free_irq(wm8994->wm8994, WM8994_IRQ_TEMP_SHUT, component);
 	wm8994_free_irq(wm8994->wm8994, WM8994_IRQ_TEMP_WARN, component);
+	cancel_delayed_work_sync(&wm8994->jackdet_bootstrap);
+	cancel_delayed_work_sync(&wm8994->mic_complete_work);
+	if (control->type == WM8994 || control->type == WM1811)
+		cancel_delayed_work_sync(&wm8994->mic_work);
+	cancel_delayed_work_sync(&wm8994->open_circuit_work);
 
 	return ret;
 }
@@ -4604,6 +4609,11 @@ static void wm8994_component_remove(struct snd_soc_component *component)
 			free_irq(wm8994->micdet_irq, wm8994);
 		break;
 	}
+	cancel_delayed_work_sync(&wm8994->jackdet_bootstrap);
+	cancel_delayed_work_sync(&wm8994->mic_complete_work);
+	if (control->type == WM8994 || control->type == WM1811)
+		cancel_delayed_work_sync(&wm8994->mic_work);
+	cancel_delayed_work_sync(&wm8994->open_circuit_work);
 	release_firmware(wm8994->mbc);
 	release_firmware(wm8994->mbc_vss);
 	release_firmware(wm8994->enh_eq);
-- 
2.47.3