Subject: [PATCH 3/4] ASoC: stm: stm32_sai_sub: Use guard() for mutex & spin locks

From: [email-masked]
Date: Wed, 13 May 2026 17:43:28 +0700

From: bui duc phuc <[email-masked]>

Clean up the code using guard() for mutex & spin locks.
Merely code refactoring, and no behavior change.

Signed-off-by: bui duc phuc <[email-masked]>
---
 sound/soc/stm/stm32_sai_sub.c | 29 +++++++++++------------------
 1 file changed, 11 insertions(+), 18 deletions(-)

diff --git a/sound/soc/stm/stm32_sai_sub.c b/sound/soc/stm/stm32_sai_sub.c
index 3e82fa90e719..ea9e8bddd63f 100644
--- a/sound/soc/stm/stm32_sai_sub.c
+++ b/sound/soc/stm/stm32_sai_sub.c
@@ -280,9 +280,8 @@ static int snd_pcm_iec958_get(struct snd_kcontrol *kcontrol,
 {
 	struct stm32_sai_sub_data *sai = snd_kcontrol_chip(kcontrol);
 
-	mutex_lock(&sai->ctrl_lock);
+	guard(mutex)(&sai->ctrl_lock);
 	memcpy(uctl->value.iec958.status, sai->iec958.status, 4);
-	mutex_unlock(&sai->ctrl_lock);
 
 	return 0;
 }
@@ -292,9 +291,8 @@ static int snd_pcm_iec958_put(struct snd_kcontrol *kcontrol,
 {
 	struct stm32_sai_sub_data *sai = snd_kcontrol_chip(kcontrol);
 
-	mutex_lock(&sai->ctrl_lock);
+	guard(mutex)(&sai->ctrl_lock);
 	memcpy(sai->iec958.status, uctl->value.iec958.status, 4);
-	mutex_unlock(&sai->ctrl_lock);
 
 	return 0;
 }
@@ -658,10 +656,10 @@ static irqreturn_t stm32_sai_isr(int irq, void *devid)
 		status = SNDRV_PCM_STATE_XRUN;
 	}
 
-	spin_lock(&sai->irq_lock);
-	if (status != SNDRV_PCM_STATE_RUNNING && sai->substream)
-		snd_pcm_stop_xrun(sai->substream);
-	spin_unlock(&sai->irq_lock);
+	scoped_guard(spinlock, &sai->irq_lock) {
+		if (status != SNDRV_PCM_STATE_RUNNING && sai->substream)
+			snd_pcm_stop_xrun(sai->substream);
+	}
 
 	return IRQ_HANDLED;
 }
@@ -894,11 +892,9 @@ static int stm32_sai_startup(struct snd_pcm_substream *substream,
 {
 	struct stm32_sai_sub_data *sai = snd_soc_dai_get_drvdata(cpu_dai);
 	int imr, cr2, ret;
-	unsigned long flags;
 
-	spin_lock_irqsave(&sai->irq_lock, flags);
-	sai->substream = substream;
-	spin_unlock_irqrestore(&sai->irq_lock, flags);
+	scoped_guard(spinlock_irqsave, &sai->irq_lock)
+		sai->substream = substream;
 
 	if (STM_SAI_PROTOCOL_IS_SPDIF(sai)) {
 		snd_pcm_hw_constraint_mask64(substream->runtime,
@@ -1083,7 +1079,7 @@ static void stm32_sai_set_iec958_status(struct stm32_sai_sub_data *sai,
 		return;
 
 	/* Force the sample rate according to runtime rate */
-	mutex_lock(&sai->ctrl_lock);
+	guard(mutex)(&sai->ctrl_lock);
 	switch (runtime->rate) {
 	case 22050:
 		sai->iec958.status[3] = IEC958_AES3_CON_FS_22050;
@@ -1116,7 +1112,6 @@ static void stm32_sai_set_iec958_status(struct stm32_sai_sub_data *sai,
 		sai->iec958.status[3] = IEC958_AES3_CON_FS_NOTID;
 		break;
 	}
-	mutex_unlock(&sai->ctrl_lock);
 }
 
 static int stm32_sai_configure_clock(struct snd_soc_dai *cpu_dai,
@@ -1284,7 +1279,6 @@ static void stm32_sai_shutdown(struct snd_pcm_substream *substream,
 			       struct snd_soc_dai *cpu_dai)
 {
 	struct stm32_sai_sub_data *sai = snd_soc_dai_get_drvdata(cpu_dai);
-	unsigned long flags;
 
 	stm32_sai_sub_reg_up(sai, STM_SAI_IMR_REGX, SAI_XIMR_MASK, 0);
 
@@ -1298,9 +1292,8 @@ static void stm32_sai_shutdown(struct snd_pcm_substream *substream,
 	if (!sai->sai_mclk && sai->put_sai_ck_rate)
 		sai->put_sai_ck_rate(sai);
 
-	spin_lock_irqsave(&sai->irq_lock, flags);
-	sai->substream = NULL;
-	spin_unlock_irqrestore(&sai->irq_lock, flags);
+	scoped_guard(spinlock_irqsave, &sai->irq_lock)
+		sai->substream = NULL;
 }
 
 static int stm32_sai_pcm_new(struct snd_soc_pcm_runtime *rtd,
-- 
2.43.0