From: Takashi Iwai <tiwai@suse.de>
Date: Fri, 29 Aug 2025 14:43:23 +0000 (+0200)
Subject: ALSA: pcxhr: Use guard() for mutex locks
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=26e4346cff3a33fed726c074df4719eddd930175;p=users%2Fhch%2Fmisc.git

ALSA: pcxhr: Use guard() for mutex locks

Replace the manual mutex lock/unlock pairs with guard() for code
simplification.

Only code refactoring, and no behavior change.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Link: https://patch.msgid.link/20250829144342.4290-49-tiwai@suse.de
---

diff --git a/sound/pci/pcxhr/pcxhr.c b/sound/pci/pcxhr/pcxhr.c
index bfd84c50e981..83066d08367e 100644
--- a/sound/pci/pcxhr/pcxhr.c
+++ b/sound/pci/pcxhr/pcxhr.c
@@ -701,7 +701,7 @@ static void pcxhr_start_linked_stream(struct pcxhr_mgr *mgr)
 
 	start_time = ktime_get();
 #endif
-	mutex_lock(&mgr->setup_mutex);
+	guard(mutex)(&mgr->setup_mutex);
 
 	/* check the pipes concerned and build pipe_array */
 	for (i = 0; i < mgr->num_cards; i++) {
@@ -720,7 +720,6 @@ static void pcxhr_start_linked_stream(struct pcxhr_mgr *mgr)
 		}
 	}
 	if (capture_mask == 0 && playback_mask == 0) {
-		mutex_unlock(&mgr->setup_mutex);
 		dev_err(&mgr->pci->dev, "%s : no pipes\n", __func__);
 		return;
 	}
@@ -731,7 +730,6 @@ static void pcxhr_start_linked_stream(struct pcxhr_mgr *mgr)
 	/* synchronous stop of all the pipes concerned */
 	err = pcxhr_set_pipe_state(mgr,  playback_mask, capture_mask, 0);
 	if (err) {
-		mutex_unlock(&mgr->setup_mutex);
 		dev_err(&mgr->pci->dev, "%s : "
 			   "error stop pipes (P%x C%x)\n",
 			   __func__, playback_mask, capture_mask);
@@ -776,7 +774,6 @@ static void pcxhr_start_linked_stream(struct pcxhr_mgr *mgr)
 	/* synchronous start of all the pipes concerned */
 	err = pcxhr_set_pipe_state(mgr, playback_mask, capture_mask, 1);
 	if (err) {
-		mutex_unlock(&mgr->setup_mutex);
 		dev_err(&mgr->pci->dev, "%s : "
 			   "error start pipes (P%x C%x)\n",
 			   __func__, playback_mask, capture_mask);
@@ -786,7 +783,7 @@ static void pcxhr_start_linked_stream(struct pcxhr_mgr *mgr)
 	/* put the streams into the running state now
 	 * (increment pointer by interrupt)
 	 */
-	mutex_lock(&mgr->lock);
+	guard(mutex)(&mgr->lock);
 	for ( i =0; i < mgr->num_cards; i++) {
 		struct pcxhr_stream *stream;
 		chip = mgr->chip[i];
@@ -804,9 +801,6 @@ static void pcxhr_start_linked_stream(struct pcxhr_mgr *mgr)
 			}
 		}
 	}
-	mutex_unlock(&mgr->lock);
-
-	mutex_unlock(&mgr->setup_mutex);
 
 #ifdef CONFIG_SND_DEBUG_VERBOSE
 	stop_time = ktime_get();
@@ -907,7 +901,7 @@ static int pcxhr_prepare(struct snd_pcm_substream *subs)
 		    subs->runtime->period_size, subs->runtime->periods,
 		    subs->runtime->buffer_size);
 
-	mutex_lock(&mgr->setup_mutex);
+	guard(mutex)(&mgr->setup_mutex);
 
 	do {
 		/* only the first stream can choose the sample rate */
@@ -923,8 +917,6 @@ static int pcxhr_prepare(struct snd_pcm_substream *subs)
 		}
 	} while(0);	/* do only once (so we can use break instead of goto) */
 
-	mutex_unlock(&mgr->setup_mutex);
-
 	return err;
 }
 
@@ -939,15 +931,13 @@ static int pcxhr_hw_params(struct snd_pcm_substream *subs,
 	struct pcxhr_mgr *mgr = chip->mgr;
 	struct pcxhr_stream *stream = subs->runtime->private_data;
 
-	mutex_lock(&mgr->setup_mutex);
+	guard(mutex)(&mgr->setup_mutex);
 
 	/* set up channels */
 	stream->channels = params_channels(hw);
 	/* set up format for the stream */
 	stream->format = params_format(hw);
 
-	mutex_unlock(&mgr->setup_mutex);
-
 	return 0;
 }
 
@@ -990,7 +980,7 @@ static int pcxhr_open(struct snd_pcm_substream *subs)
 	struct pcxhr_stream    *stream;
 	int err;
 
-	mutex_lock(&mgr->setup_mutex);
+	guard(mutex)(&mgr->setup_mutex);
 
 	/* copy the struct snd_pcm_hardware struct */
 	runtime->hw = pcxhr_caps;
@@ -1012,7 +1002,6 @@ static int pcxhr_open(struct snd_pcm_substream *subs)
 		/* streams in use */
 		dev_err(chip->card->dev, "%s chip%d subs%d in use\n",
 			   __func__, chip->chip_idx, subs->number);
-		mutex_unlock(&mgr->setup_mutex);
 		return -EBUSY;
 	}
 
@@ -1023,10 +1012,8 @@ static int pcxhr_open(struct snd_pcm_substream *subs)
 	/* buffer-size should better be multiple of period-size */
 	err = snd_pcm_hw_constraint_integer(runtime,
 					    SNDRV_PCM_HW_PARAM_PERIODS);
-	if (err < 0) {
-		mutex_unlock(&mgr->setup_mutex);
+	if (err < 0)
 		return err;
-	}
 
 	/* if a sample rate is already used or fixed by external clock,
 	 * the stream cannot change
@@ -1040,7 +1027,6 @@ static int pcxhr_open(struct snd_pcm_substream *subs)
 						     &external_rate) ||
 			    external_rate == 0) {
 				/* cannot detect the external clock rate */
-				mutex_unlock(&mgr->setup_mutex);
 				return -EBUSY;
 			}
 			runtime->hw.rate_min = external_rate;
@@ -1063,7 +1049,6 @@ static int pcxhr_open(struct snd_pcm_substream *subs)
 
 	mgr->ref_count_rate++;
 
-	mutex_unlock(&mgr->setup_mutex);
 	return 0;
 }
 
@@ -1074,7 +1059,7 @@ static int pcxhr_close(struct snd_pcm_substream *subs)
 	struct pcxhr_mgr *mgr = chip->mgr;
 	struct pcxhr_stream *stream = subs->runtime->private_data;
 
-	mutex_lock(&mgr->setup_mutex);
+	guard(mutex)(&mgr->setup_mutex);
 
 	dev_dbg(chip->card->dev, "%s chip%d subs%d\n", __func__,
 		    chip->chip_idx, subs->number);
@@ -1088,8 +1073,6 @@ static int pcxhr_close(struct snd_pcm_substream *subs)
 	stream->status    = PCXHR_STREAM_STATUS_FREE;
 	stream->substream = NULL;
 
-	mutex_unlock(&mgr->setup_mutex);
-
 	return 0;
 }
 
@@ -1102,14 +1085,12 @@ static snd_pcm_uframes_t pcxhr_stream_pointer(struct snd_pcm_substream *subs)
 	struct snd_pcm_runtime *runtime = subs->runtime;
 	struct pcxhr_stream *stream  = runtime->private_data;
 
-	mutex_lock(&chip->mgr->lock);
+	guard(mutex)(&chip->mgr->lock);
 
 	/* get the period fragment and the nb of periods in the buffer */
 	timer_period_frag = stream->timer_period_frag;
 	timer_buf_periods = stream->timer_buf_periods;
 
-	mutex_unlock(&chip->mgr->lock);
-
 	return (snd_pcm_uframes_t)((timer_buf_periods * runtime->period_size) +
 				   timer_period_frag);
 }
diff --git a/sound/pci/pcxhr/pcxhr_core.c b/sound/pci/pcxhr/pcxhr_core.c
index 23f253effb4f..b3b9ab4f303e 100644
--- a/sound/pci/pcxhr/pcxhr_core.c
+++ b/sound/pci/pcxhr/pcxhr_core.c
@@ -754,12 +754,8 @@ void pcxhr_set_pipe_cmd_params(struct pcxhr_rmh *rmh, int capture,
  */
 int pcxhr_send_msg(struct pcxhr_mgr *mgr, struct pcxhr_rmh *rmh)
 {
-	int err;
-
-	mutex_lock(&mgr->msg_lock);
-	err = pcxhr_send_msg_nolock(mgr, rmh);
-	mutex_unlock(&mgr->msg_lock);
-	return err;
+	guard(mutex)(&mgr->msg_lock);
+	return pcxhr_send_msg_nolock(mgr, rmh);
 }
 
 static inline int pcxhr_pipes_running(struct pcxhr_mgr *mgr)
@@ -962,14 +958,13 @@ int pcxhr_write_io_num_reg_cont(struct pcxhr_mgr *mgr, unsigned int mask,
 	struct pcxhr_rmh rmh;
 	int err;
 
-	mutex_lock(&mgr->msg_lock);
+	guard(mutex)(&mgr->msg_lock);
 	if ((mgr->io_num_reg_cont & mask) == value) {
 		dev_dbg(&mgr->pci->dev,
 			"IO_NUM_REG_CONT mask %x already is set to %x\n",
 			    mask, value);
 		if (changed)
 			*changed = 0;
-		mutex_unlock(&mgr->msg_lock);
 		return 0;	/* already programmed */
 	}
 	pcxhr_init_rmh(&rmh, CMD_ACCESS_IO_WRITE);
@@ -984,7 +979,6 @@ int pcxhr_write_io_num_reg_cont(struct pcxhr_mgr *mgr, unsigned int mask,
 		if (changed)
 			*changed = 1;
 	}
-	mutex_unlock(&mgr->msg_lock);
 	return err;
 }
 
@@ -1269,7 +1263,7 @@ irqreturn_t pcxhr_threaded_irq(int irq, void *dev_id)
 	int i, j;
 	struct snd_pcxhr *chip;
 
-	mutex_lock(&mgr->lock);
+	guard(mutex)(&mgr->lock);
 	if (mgr->src_it_dsp & PCXHR_IRQ_TIMER) {
 		/* is a 24 bit counter */
 		int dsp_time_new =
@@ -1328,6 +1322,5 @@ irqreturn_t pcxhr_threaded_irq(int irq, void *dev_id)
 	}
 
 	pcxhr_msg_thread(mgr);
-	mutex_unlock(&mgr->lock);
 	return IRQ_HANDLED;
 }
diff --git a/sound/pci/pcxhr/pcxhr_mix22.c b/sound/pci/pcxhr/pcxhr_mix22.c
index e1435afc4907..80d22e22ea30 100644
--- a/sound/pci/pcxhr/pcxhr_mix22.c
+++ b/sound/pci/pcxhr/pcxhr_mix22.c
@@ -710,9 +710,9 @@ static int hr222_mic_vol_get(struct snd_kcontrol *kcontrol,
 			     struct snd_ctl_elem_value *ucontrol)
 {
 	struct snd_pcxhr *chip = snd_kcontrol_chip(kcontrol);
-	mutex_lock(&chip->mgr->mixer_mutex);
+
+	guard(mutex)(&chip->mgr->mixer_mutex);
 	ucontrol->value.integer.value[0] = chip->mic_volume;
-	mutex_unlock(&chip->mgr->mixer_mutex);
 	return 0;
 }
 
@@ -721,13 +721,13 @@ static int hr222_mic_vol_put(struct snd_kcontrol *kcontrol,
 {
 	struct snd_pcxhr *chip = snd_kcontrol_chip(kcontrol);
 	int changed = 0;
-	mutex_lock(&chip->mgr->mixer_mutex);
+
+	guard(mutex)(&chip->mgr->mixer_mutex);
 	if (chip->mic_volume != ucontrol->value.integer.value[0]) {
 		changed = 1;
 		chip->mic_volume = ucontrol->value.integer.value[0];
 		hr222_update_analog_audio_level(chip, 1, 0);
 	}
-	mutex_unlock(&chip->mgr->mixer_mutex);
 	return changed;
 }
 
@@ -760,9 +760,9 @@ static int hr222_mic_boost_get(struct snd_kcontrol *kcontrol,
 			       struct snd_ctl_elem_value *ucontrol)
 {
 	struct snd_pcxhr *chip = snd_kcontrol_chip(kcontrol);
-	mutex_lock(&chip->mgr->mixer_mutex);
+
+	guard(mutex)(&chip->mgr->mixer_mutex);
 	ucontrol->value.integer.value[0] = chip->mic_boost;
-	mutex_unlock(&chip->mgr->mixer_mutex);
 	return 0;
 }
 
@@ -771,13 +771,13 @@ static int hr222_mic_boost_put(struct snd_kcontrol *kcontrol,
 {
 	struct snd_pcxhr *chip = snd_kcontrol_chip(kcontrol);
 	int changed = 0;
-	mutex_lock(&chip->mgr->mixer_mutex);
+
+	guard(mutex)(&chip->mgr->mixer_mutex);
 	if (chip->mic_boost != ucontrol->value.integer.value[0]) {
 		changed = 1;
 		chip->mic_boost = ucontrol->value.integer.value[0];
 		hr222_micro_boost(chip->mgr, chip->mic_boost);
 	}
-	mutex_unlock(&chip->mgr->mixer_mutex);
 	return changed;
 }
 
@@ -800,9 +800,9 @@ static int hr222_phantom_power_get(struct snd_kcontrol *kcontrol,
 				   struct snd_ctl_elem_value *ucontrol)
 {
 	struct snd_pcxhr *chip = snd_kcontrol_chip(kcontrol);
-	mutex_lock(&chip->mgr->mixer_mutex);
+
+	guard(mutex)(&chip->mgr->mixer_mutex);
 	ucontrol->value.integer.value[0] = chip->phantom_power;
-	mutex_unlock(&chip->mgr->mixer_mutex);
 	return 0;
 }
 
@@ -812,14 +812,13 @@ static int hr222_phantom_power_put(struct snd_kcontrol *kcontrol,
 	struct snd_pcxhr *chip = snd_kcontrol_chip(kcontrol);
 	int power, changed = 0;
 
-	mutex_lock(&chip->mgr->mixer_mutex);
+	guard(mutex)(&chip->mgr->mixer_mutex);
 	power = !!ucontrol->value.integer.value[0];
 	if (chip->phantom_power != power) {
 		hr222_phantom_power(chip->mgr, power);
 		chip->phantom_power = power;
 		changed = 1;
 	}
-	mutex_unlock(&chip->mgr->mixer_mutex);
 	return changed;
 }
 
diff --git a/sound/pci/pcxhr/pcxhr_mixer.c b/sound/pci/pcxhr/pcxhr_mixer.c
index aec509461dd6..03daa2832b1b 100644
--- a/sound/pci/pcxhr/pcxhr_mixer.c
+++ b/sound/pci/pcxhr/pcxhr_mixer.c
@@ -110,7 +110,8 @@ static int pcxhr_analog_vol_get(struct snd_kcontrol *kcontrol,
 				struct snd_ctl_elem_value *ucontrol)
 {
 	struct snd_pcxhr *chip = snd_kcontrol_chip(kcontrol);
-	mutex_lock(&chip->mgr->mixer_mutex);
+
+	guard(mutex)(&chip->mgr->mixer_mutex);
 	if (kcontrol->private_value == 0) {	/* playback */
 	  ucontrol->value.integer.value[0] = chip->analog_playback_volume[0];
 	  ucontrol->value.integer.value[1] = chip->analog_playback_volume[1];
@@ -118,7 +119,6 @@ static int pcxhr_analog_vol_get(struct snd_kcontrol *kcontrol,
 	  ucontrol->value.integer.value[0] = chip->analog_capture_volume[0];
 	  ucontrol->value.integer.value[1] = chip->analog_capture_volume[1];
 	}
-	mutex_unlock(&chip->mgr->mixer_mutex);
 	return 0;
 }
 
@@ -129,7 +129,7 @@ static int pcxhr_analog_vol_put(struct snd_kcontrol *kcontrol,
 	int changed = 0;
 	int is_capture, i;
 
-	mutex_lock(&chip->mgr->mixer_mutex);
+	guard(mutex)(&chip->mgr->mixer_mutex);
 	is_capture = (kcontrol->private_value != 0);
 	for (i = 0; i < 2; i++) {
 		int  new_volume = ucontrol->value.integer.value[i];
@@ -168,7 +168,6 @@ static int pcxhr_analog_vol_put(struct snd_kcontrol *kcontrol,
 								is_capture, i);
 		}
 	}
-	mutex_unlock(&chip->mgr->mixer_mutex);
 	return changed;
 }
 
@@ -192,10 +191,9 @@ static int pcxhr_audio_sw_get(struct snd_kcontrol *kcontrol,
 {
 	struct snd_pcxhr *chip = snd_kcontrol_chip(kcontrol);
 
-	mutex_lock(&chip->mgr->mixer_mutex);
+	guard(mutex)(&chip->mgr->mixer_mutex);
 	ucontrol->value.integer.value[0] = chip->analog_playback_active[0];
 	ucontrol->value.integer.value[1] = chip->analog_playback_active[1];
-	mutex_unlock(&chip->mgr->mixer_mutex);
 	return 0;
 }
 
@@ -204,7 +202,8 @@ static int pcxhr_audio_sw_put(struct snd_kcontrol *kcontrol,
 {
 	struct snd_pcxhr *chip = snd_kcontrol_chip(kcontrol);
 	int i, changed = 0;
-	mutex_lock(&chip->mgr->mixer_mutex);
+
+	guard(mutex)(&chip->mgr->mixer_mutex);
 	for(i = 0; i < 2; i++) {
 		if (chip->analog_playback_active[i] !=
 		    ucontrol->value.integer.value[i]) {
@@ -218,7 +217,6 @@ static int pcxhr_audio_sw_put(struct snd_kcontrol *kcontrol,
 				pcxhr_update_analog_audio_level(chip, 0, i);
 		}
 	}
-	mutex_unlock(&chip->mgr->mixer_mutex);
 	return changed;
 }
 
@@ -352,14 +350,13 @@ static int pcxhr_pcm_vol_get(struct snd_kcontrol *kcontrol,
 	int *stored_volume;
 	int is_capture = kcontrol->private_value;
 
-	mutex_lock(&chip->mgr->mixer_mutex);
+	guard(mutex)(&chip->mgr->mixer_mutex);
 	if (is_capture)		/* digital capture */
 		stored_volume = chip->digital_capture_volume;
 	else			/* digital playback */
 		stored_volume = chip->digital_playback_volume[idx];
 	ucontrol->value.integer.value[0] = stored_volume[0];
 	ucontrol->value.integer.value[1] = stored_volume[1];
-	mutex_unlock(&chip->mgr->mixer_mutex);
 	return 0;
 }
 
@@ -373,7 +370,7 @@ static int pcxhr_pcm_vol_put(struct snd_kcontrol *kcontrol,
 	int *stored_volume;
 	int i;
 
-	mutex_lock(&chip->mgr->mixer_mutex);
+	guard(mutex)(&chip->mgr->mixer_mutex);
 	if (is_capture)		/* digital capture */
 		stored_volume = chip->digital_capture_volume;
 	else			/* digital playback */
@@ -392,7 +389,6 @@ static int pcxhr_pcm_vol_put(struct snd_kcontrol *kcontrol,
 	}
 	if (!is_capture && changed)	/* update playback volume */
 		pcxhr_update_playback_stream_level(chip, idx);
-	mutex_unlock(&chip->mgr->mixer_mutex);
 	return changed;
 }
 
@@ -416,10 +412,9 @@ static int pcxhr_pcm_sw_get(struct snd_kcontrol *kcontrol,
 	struct snd_pcxhr *chip = snd_kcontrol_chip(kcontrol);
 	int idx = snd_ctl_get_ioffidx(kcontrol, &ucontrol->id); /* index */
 
-	mutex_lock(&chip->mgr->mixer_mutex);
+	guard(mutex)(&chip->mgr->mixer_mutex);
 	ucontrol->value.integer.value[0] = chip->digital_playback_active[idx][0];
 	ucontrol->value.integer.value[1] = chip->digital_playback_active[idx][1];
-	mutex_unlock(&chip->mgr->mixer_mutex);
 	return 0;
 }
 
@@ -431,7 +426,7 @@ static int pcxhr_pcm_sw_put(struct snd_kcontrol *kcontrol,
 	int idx = snd_ctl_get_ioffidx(kcontrol, &ucontrol->id); /* index */
 	int i, j;
 
-	mutex_lock(&chip->mgr->mixer_mutex);
+	guard(mutex)(&chip->mgr->mixer_mutex);
 	j = idx;
 	for (i = 0; i < 2; i++) {
 		if (chip->digital_playback_active[j][i] !=
@@ -443,7 +438,6 @@ static int pcxhr_pcm_sw_put(struct snd_kcontrol *kcontrol,
 	}
 	if (changed)
 		pcxhr_update_playback_stream_level(chip, idx);
-	mutex_unlock(&chip->mgr->mixer_mutex);
 	return changed;
 }
 
@@ -465,10 +459,10 @@ static int pcxhr_monitor_vol_get(struct snd_kcontrol *kcontrol,
 				 struct snd_ctl_elem_value *ucontrol)
 {
 	struct snd_pcxhr *chip = snd_kcontrol_chip(kcontrol);
-	mutex_lock(&chip->mgr->mixer_mutex);
+
+	guard(mutex)(&chip->mgr->mixer_mutex);
 	ucontrol->value.integer.value[0] = chip->monitoring_volume[0];
 	ucontrol->value.integer.value[1] = chip->monitoring_volume[1];
-	mutex_unlock(&chip->mgr->mixer_mutex);
 	return 0;
 }
 
@@ -479,7 +473,7 @@ static int pcxhr_monitor_vol_put(struct snd_kcontrol *kcontrol,
 	int changed = 0;
 	int i;
 
-	mutex_lock(&chip->mgr->mixer_mutex);
+	guard(mutex)(&chip->mgr->mixer_mutex);
 	for (i = 0; i < 2; i++) {
 		if (chip->monitoring_volume[i] !=
 		    ucontrol->value.integer.value[i]) {
@@ -492,7 +486,6 @@ static int pcxhr_monitor_vol_put(struct snd_kcontrol *kcontrol,
 			changed = 1;
 		}
 	}
-	mutex_unlock(&chip->mgr->mixer_mutex);
 	return changed;
 }
 
@@ -515,10 +508,10 @@ static int pcxhr_monitor_sw_get(struct snd_kcontrol *kcontrol,
 				struct snd_ctl_elem_value *ucontrol)
 {
 	struct snd_pcxhr *chip = snd_kcontrol_chip(kcontrol);
-	mutex_lock(&chip->mgr->mixer_mutex);
+
+	guard(mutex)(&chip->mgr->mixer_mutex);
 	ucontrol->value.integer.value[0] = chip->monitoring_active[0];
 	ucontrol->value.integer.value[1] = chip->monitoring_active[1];
-	mutex_unlock(&chip->mgr->mixer_mutex);
 	return 0;
 }
 
@@ -529,7 +522,7 @@ static int pcxhr_monitor_sw_put(struct snd_kcontrol *kcontrol,
 	int changed = 0;
 	int i;
 
-	mutex_lock(&chip->mgr->mixer_mutex);
+	guard(mutex)(&chip->mgr->mixer_mutex);
 	for (i = 0; i < 2; i++) {
 		if (chip->monitoring_active[i] !=
 		    ucontrol->value.integer.value[i]) {
@@ -545,7 +538,6 @@ static int pcxhr_monitor_sw_put(struct snd_kcontrol *kcontrol,
 		/* update right monitoring volume and mute */
 		pcxhr_update_audio_pipe_level(chip, 0, 1);
 
-	mutex_unlock(&chip->mgr->mixer_mutex);
 	return (changed != 0);
 }
 
@@ -671,7 +663,7 @@ static int pcxhr_audio_src_put(struct snd_kcontrol *kcontrol,
 	}
 	if (ucontrol->value.enumerated.item[0] >= i)
 		return -EINVAL;
-	mutex_lock(&chip->mgr->mixer_mutex);
+	guard(mutex)(&chip->mgr->mixer_mutex);
 	if (chip->audio_capture_source != ucontrol->value.enumerated.item[0]) {
 		chip->audio_capture_source = ucontrol->value.enumerated.item[0];
 		if (chip->mgr->is_hr_stereo)
@@ -680,7 +672,6 @@ static int pcxhr_audio_src_put(struct snd_kcontrol *kcontrol,
 			pcxhr_set_audio_source(chip);
 		ret = 1;
 	}
-	mutex_unlock(&chip->mgr->mixer_mutex);
 	return ret;
 }
 
@@ -760,9 +751,9 @@ static int pcxhr_clock_type_put(struct snd_kcontrol *kcontrol,
 	}
 	if (ucontrol->value.enumerated.item[0] >= clock_items)
 		return -EINVAL;
-	mutex_lock(&mgr->mixer_mutex);
+	guard(mutex)(&mgr->mixer_mutex);
 	if (mgr->use_clock_type != ucontrol->value.enumerated.item[0]) {
-		mutex_lock(&mgr->setup_mutex);
+		guard(mutex)(&mgr->setup_mutex);
 		mgr->use_clock_type = ucontrol->value.enumerated.item[0];
 		rate = 0;
 		if (mgr->use_clock_type != PCXHR_CLOCK_TYPE_INTERNAL) {
@@ -778,10 +769,8 @@ static int pcxhr_clock_type_put(struct snd_kcontrol *kcontrol,
 			if (mgr->sample_rate)
 				mgr->sample_rate = rate;
 		}
-		mutex_unlock(&mgr->setup_mutex);
 		ret = 1; /* return 1 even if the set was not done. ok ? */
 	}
-	mutex_unlock(&mgr->mixer_mutex);
 	return ret;
 }
 
@@ -814,7 +803,7 @@ static int pcxhr_clock_rate_get(struct snd_kcontrol *kcontrol,
 	struct pcxhr_mgr *mgr = snd_kcontrol_chip(kcontrol);
 	int i, err, rate;
 
-	mutex_lock(&mgr->mixer_mutex);
+	guard(mutex)(&mgr->mixer_mutex);
 	for(i = 0; i < 3 + mgr->capture_chips; i++) {
 		if (i == PCXHR_CLOCK_TYPE_INTERNAL)
 			rate = mgr->sample_rate_real;
@@ -825,7 +814,6 @@ static int pcxhr_clock_rate_get(struct snd_kcontrol *kcontrol,
 		}
 		ucontrol->value.integer.value[i] = rate;
 	}
-	mutex_unlock(&mgr->mixer_mutex);
 	return 0;
 }
 
@@ -918,7 +906,7 @@ static int pcxhr_iec958_get(struct snd_kcontrol *kcontrol,
 	unsigned char aes_bits;
 	int i, err;
 
-	mutex_lock(&chip->mgr->mixer_mutex);
+	guard(mutex)(&chip->mgr->mixer_mutex);
 	for(i = 0; i < 5; i++) {
 		if (kcontrol->private_value == 0)	/* playback */
 			aes_bits = chip->aes_bits[i];
@@ -934,7 +922,6 @@ static int pcxhr_iec958_get(struct snd_kcontrol *kcontrol,
 		}
 		ucontrol->value.iec958.status[i] = aes_bits;
 	}
-	mutex_unlock(&chip->mgr->mixer_mutex);
         return 0;
 }
 
@@ -988,7 +975,7 @@ static int pcxhr_iec958_put(struct snd_kcontrol *kcontrol,
 	int i, changed = 0;
 
 	/* playback */
-	mutex_lock(&chip->mgr->mixer_mutex);
+	guard(mutex)(&chip->mgr->mixer_mutex);
 	for (i = 0; i < 5; i++) {
 		if (ucontrol->value.iec958.status[i] != chip->aes_bits[i]) {
 			if (chip->mgr->is_hr_stereo)
@@ -1000,7 +987,6 @@ static int pcxhr_iec958_put(struct snd_kcontrol *kcontrol,
 			changed = 1;
 		}
 	}
-	mutex_unlock(&chip->mgr->mixer_mutex);
 	return changed;
 }