[PATCH v2 14/24] ASoC: codecs: cs42l42: Use guard() cleanup helpers

[phucduc.bui@gmail.com]

From: bui duc phuc <phucduc.bui@gmail.com>

Clean up the code using guard() helpers for mutex locking
and PM runtime management.
No functional change intended.

Reviewed-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Signed-off-by: bui duc phuc <phucduc.bui@gmail.com>
---
 sound/soc/codecs/cs42l42.c | 54 +++++++++++++++++---------------------
 1 file changed, 24 insertions(+), 30 deletions(-)

diff --git a/sound/soc/codecs/cs42l42.c b/sound/soc/codecs/cs42l42.c
index 2652a639a79a..fadf68860601 100644
--- a/sound/soc/codecs/cs42l42.c
+++ b/sound/soc/codecs/cs42l42.c
@@ -9,6 +9,7 @@
  * Author: Michael White <michael.white@cirrus.com>
  */
 
+#include <linux/cleanup.h>
 #include <linux/module.h>
 #include <linux/moduleparam.h>
 #include <linux/types.h>
@@ -565,7 +566,7 @@ static int cs42l42_set_jack(struct snd_soc_component *component, struct snd_soc_
 	struct cs42l42_private *cs42l42 = snd_soc_component_get_drvdata(component);
 
 	/* Prevent race with interrupt handler */
-	mutex_lock(&cs42l42->irq_lock);
+	guard(mutex)(&cs42l42->irq_lock);
 	cs42l42->jack = jk;
 
 	if (jk) {
@@ -581,7 +582,6 @@ static int cs42l42_set_jack(struct snd_soc_component *component, struct snd_soc_
 			break;
 		}
 	}
-	mutex_unlock(&cs42l42->irq_lock);
 
 	return 0;
 }
@@ -1668,13 +1668,10 @@ irqreturn_t cs42l42_irq_thread(int irq, void *data)
 	unsigned int current_button_status;
 	unsigned int i;
 
-	pm_runtime_get_sync(cs42l42->dev);
-	mutex_lock(&cs42l42->irq_lock);
-	if (cs42l42->suspended || !cs42l42->init_done) {
-		mutex_unlock(&cs42l42->irq_lock);
-		pm_runtime_put_autosuspend(cs42l42->dev);
+	guard(pm_runtime_active_auto)(cs42l42->dev);
+	guard(mutex)(&cs42l42->irq_lock);
+	if (cs42l42->suspended || !cs42l42->init_done)
 		return IRQ_NONE;
-	}
 
 	/* Read sticky registers to clear interurpt */
 	for (i = 0; i < ARRAY_SIZE(stickies); i++) {
@@ -1774,9 +1771,6 @@ irqreturn_t cs42l42_irq_thread(int irq, void *data)
 		}
 	}
 
-	mutex_unlock(&cs42l42->irq_lock);
-	pm_runtime_put_autosuspend(cs42l42->dev);
-
 	return IRQ_HANDLED;
 }
 EXPORT_SYMBOL_NS_GPL(cs42l42_irq_thread, "SND_SOC_CS42L42_CORE");
@@ -2163,22 +2157,22 @@ int cs42l42_suspend(struct device *dev)
 	 * future interrupts. This ensures a safe disable if the interrupt
 	 * is shared.
 	 */
-	mutex_lock(&cs42l42->irq_lock);
-	cs42l42->suspended = true;
+	scoped_guard(mutex, &cs42l42->irq_lock) {
+		cs42l42->suspended = true;
 
-	/* Save register values that will be overwritten by shutdown sequence */
-	for (i = 0; i < ARRAY_SIZE(cs42l42_shutdown_seq); ++i) {
-		regmap_read(cs42l42->regmap, cs42l42_shutdown_seq[i].reg, &reg);
-		save_regs[i] = (u8)reg;
-	}
+		/* Save register values that will be overwritten by shutdown sequence */
+		for (i = 0; i < ARRAY_SIZE(cs42l42_shutdown_seq); ++i) {
+			regmap_read(cs42l42->regmap, cs42l42_shutdown_seq[i].reg, &reg);
+			save_regs[i] = (u8)reg;
+		}
 
-	/* Shutdown codec */
-	regmap_multi_reg_write(cs42l42->regmap,
-			       cs42l42_shutdown_seq,
-			       ARRAY_SIZE(cs42l42_shutdown_seq));
+		/* Shutdown codec */
+		regmap_multi_reg_write(cs42l42->regmap,
+				       cs42l42_shutdown_seq,
+				       ARRAY_SIZE(cs42l42_shutdown_seq));
 
-	/* All interrupt sources are now disabled */
-	mutex_unlock(&cs42l42->irq_lock);
+		/* All interrupt sources are now disabled */
+	}
 
 	/* Wait for power-down complete */
 	msleep(CS42L42_PDN_DONE_TIME_MS);
@@ -2250,13 +2244,13 @@ void cs42l42_resume_restore(struct device *dev)
 	regcache_cache_only(cs42l42->regmap, false);
 	regcache_mark_dirty(cs42l42->regmap);
 
-	mutex_lock(&cs42l42->irq_lock);
-	/* Sync LATCH_TO_VP first so the VP domain registers sync correctly */
-	regcache_sync_region(cs42l42->regmap, CS42L42_MIC_DET_CTL1, CS42L42_MIC_DET_CTL1);
-	regcache_sync(cs42l42->regmap);
+	scoped_guard(mutex, &cs42l42->irq_lock) {
+		/* Sync LATCH_TO_VP first so the VP domain registers sync correctly */
+		regcache_sync_region(cs42l42->regmap, CS42L42_MIC_DET_CTL1, CS42L42_MIC_DET_CTL1);
+		regcache_sync(cs42l42->regmap);
 
-	cs42l42->suspended = false;
-	mutex_unlock(&cs42l42->irq_lock);
+		cs42l42->suspended = false;
+	}
 
 	dev_dbg(dev, "System resumed\n");
 }
-- 
2.43.0