ASoC: wm8994: Fix potential deadlock

Fix this by dropping wm8994->accdet_lock while calling
cancel_delayed_work_sync(&wm8994->mic_work) in wm1811_jackdet_irq().

Fixes: c0cc3f1 ("ASoC: wm8994: Allow a delay between jack insertion and microphone detect")
Signed-off-by: Marek Szyprowski <[email protected]>
Acked-by: Charles Keepax <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Mark Brown <[email protected]>

Author: mszyprow

sound/soc/codecs/wm8994.c

@@ -3853,7 +3853,12 @@ static irqreturn_t wm1811_jackdet_irq(int irq, void *data)
 	} else {
 		dev_dbg(component->dev, "Jack not detected\n");
 
+		/* Release wm8994->accdet_lock to avoid deadlock:
+		 * cancel_delayed_work_sync() takes wm8994->mic_work internal
+		 * lock and wm1811_mic_work takes wm8994->accdet_lock */
+		mutex_unlock(&wm8994->accdet_lock);
 		cancel_delayed_work_sync(&wm8994->mic_work);
+		mutex_lock(&wm8994->accdet_lock);
 
 		snd_soc_component_update_bits(component, WM8958_MICBIAS2,
 				    WM8958_MICB2_DISCH, WM8958_MICB2_DISCH);