[PATCH] ASoC: rt5640: Fix Jack work after system suspend

[Oder Chiou]

We found an corner case in RT5640 codec driver which schedules jack work
after system suspend as IRQ was enabled. Due to this, hitting the error
as register access happening after suspend as jack worker thread getting
scheduled in irq handler. The patch disables the irq during the suspend
to prevent the corner case happening.

Signed-off-by: Oder Chiou <oder_chiou at realtek.com>
Reported-by: Mohan Kumar D <mkumard at nvidia.com>
---
 sound/soc/codecs/rt5640.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/sound/soc/codecs/rt5640.c b/sound/soc/codecs/rt5640.c
index 0f8e6dd214b..708e55b7431 100644
--- a/sound/soc/codecs/rt5640.c
+++ b/sound/soc/codecs/rt5640.c
@@ -2792,6 +2792,11 @@ static int rt5640_suspend(struct snd_soc_component *component)
 {
 	struct rt5640_priv *rt5640 = snd_soc_component_get_drvdata(component);
 
+	if (rt5640->irq) {
+		/* disable jack interrupts during system suspend */
+		disable_irq(rt5640->irq);
+	}
+
 	rt5640_cancel_work(rt5640);
 	snd_soc_component_force_bias_level(component, SND_SOC_BIAS_OFF);
 	rt5640_reset(component);
@@ -2815,6 +2820,9 @@ static int rt5640_resume(struct snd_soc_component *component)
 	regcache_cache_only(rt5640->regmap, false);
 	regcache_sync(rt5640->regmap);
 
+	if (rt5640->irq)
+		enable_irq(rt5640->irq);
+
 	if (rt5640->jack) {
 		if (rt5640->jd_src == RT5640_JD_SRC_HDA_HEADER) {
 			snd_soc_component_update_bits(component,
-- 
2.34.1