[PATCH 3/4] ASoC: twl6040: cancel headset jack work on component remove

[Tristan Madani <tristmd@gmail.com>]

From: Tristan Madani <tristan@talencesecurity.com>

twl6040_remove() frees the plug detect IRQ but does not cancel the
delayed work that the IRQ handler schedules.  If the work is still
pending after free_irq() returns, it fires on freed memory.

Add cancel_delayed_work_sync() after free_irq() to drain any residual
work.  The IRQ is freed first to stop the producer, then the work is
drained.

Fixes: a2d2362edf9f ("ASoC: twl6040: Add jack support for headset and handset")
Cc: stable@vger.kernel.org
Signed-off-by: Tristan Madani <tristan@talencesecurity.com>
---
 sound/soc/codecs/twl6040.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/sound/soc/codecs/twl6040.c b/sound/soc/codecs/twl6040.c
index 650836f9615fb..826bde1a9ba46 100644
--- a/sound/soc/codecs/twl6040.c
+++ b/sound/soc/codecs/twl6040.c
@@ -1136,6 +1136,7 @@ static void twl6040_remove(struct snd_soc_component *component)
 	struct twl6040_data *priv = snd_soc_component_get_drvdata(component);
 
 	free_irq(priv->plug_irq, component);
+	cancel_delayed_work_sync(&priv->hs_jack.work);
 }
 
 static const struct snd_soc_component_driver soc_component_dev_twl6040 = {
-- 
2.47.3