[PATCH v4 07/29] ASoC: codecs: hdac_hdmi: Use guard() for mutex locks

[phucduc.bui@gmail.com]

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

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

Signed-off-by: bui duc phuc <phucduc.bui@gmail.com>
---
 sound/soc/codecs/hdac_hdmi.c | 117 +++++++++++++++++------------------
 1 file changed, 57 insertions(+), 60 deletions(-)

diff --git a/sound/soc/codecs/hdac_hdmi.c b/sound/soc/codecs/hdac_hdmi.c
index 38073a70fa61..d9e6fa6d3e99 100644
--- a/sound/soc/codecs/hdac_hdmi.c
+++ b/sound/soc/codecs/hdac_hdmi.c
@@ -10,6 +10,7 @@
  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  */
 
+#include <linux/cleanup.h>
 #include <linux/init.h>
 #include <linux/delay.h>
 #include <linux/module.h>
@@ -537,10 +538,11 @@ static struct hdac_hdmi_port *hdac_hdmi_get_port_from_cvt(
 				continue;
 
 			list_for_each_entry(port, &pcm->port_list, head) {
-				mutex_lock(&pcm->lock);
-				ret = hdac_hdmi_query_port_connlist(hdev,
-							port->pin, port);
-				mutex_unlock(&pcm->lock);
+				scoped_guard(mutex, &pcm->lock) {
+					ret = hdac_hdmi_query_port_connlist(hdev,
+									    port->pin,
+									    port);
+				}
 				if (ret < 0)
 					continue;
 
@@ -640,11 +642,11 @@ static void hdac_hdmi_pcm_close(struct snd_pcm_substream *substream,
 	pcm = hdac_hdmi_get_pcm_from_cvt(hdmi, dai_map->cvt);
 
 	if (pcm) {
-		mutex_lock(&pcm->lock);
-		pcm->chmap_set = false;
-		memset(pcm->chmap, 0, sizeof(pcm->chmap));
-		pcm->channels = 0;
-		mutex_unlock(&pcm->lock);
+		scoped_guard(mutex, &pcm->lock) {
+			pcm->chmap_set = false;
+			memset(pcm->chmap, 0, sizeof(pcm->chmap));
+			pcm->channels = 0;
+		}
 	}
 
 	if (dai_map->port)
@@ -922,7 +924,7 @@ static int hdac_hdmi_set_pin_port_mux(struct snd_kcontrol *kcontrol,
 	if (port == NULL)
 		return -EINVAL;
 
-	mutex_lock(&hdmi->pin_mutex);
+	guard(mutex)(&hdmi->pin_mutex);
 	list_for_each_entry(pcm, &hdmi->pcm_list, head) {
 		if (list_empty(&pcm->port_list))
 			continue;
@@ -945,12 +947,10 @@ static int hdac_hdmi_set_pin_port_mux(struct snd_kcontrol *kcontrol,
 			list_add_tail(&port->head, &pcm->port_list);
 			if (port->eld.monitor_present && port->eld.eld_valid) {
 				hdac_hdmi_jack_report_sync(pcm, port, true);
-				mutex_unlock(&hdmi->pin_mutex);
 				return ret;
 			}
 		}
 	}
-	mutex_unlock(&hdmi->pin_mutex);
 
 	return ret;
 }
@@ -1274,67 +1274,65 @@ static void hdac_hdmi_present_sense(struct hdac_hdmi_pin *pin,
 	 * In case of non MST pin, get_eld info API expectes port
 	 * to be -1.
 	 */
-	mutex_lock(&hdmi->pin_mutex);
-	port->eld.monitor_present = false;
+	scoped_guard(mutex, &hdmi->pin_mutex) {
+		port->eld.monitor_present = false;
 
-	if (pin->mst_capable)
-		port_id = port->id;
+		if (pin->mst_capable)
+			port_id = port->id;
 
-	size = snd_hdac_acomp_get_eld(hdev, pin->nid, port_id,
-				&port->eld.monitor_present,
-				port->eld.eld_buffer,
-				ELD_MAX_SIZE);
+		size = snd_hdac_acomp_get_eld(hdev, pin->nid, port_id,
+					      &port->eld.monitor_present,
+					      port->eld.eld_buffer,
+					      ELD_MAX_SIZE);
 
-	if (size > 0) {
-		size = min(size, ELD_MAX_SIZE);
-		if (hdac_hdmi_parse_eld(hdev, port) < 0)
-			size = -EINVAL;
-	}
-
-	eld_valid = port->eld.eld_valid;
+		if (size > 0) {
+			size = min(size, ELD_MAX_SIZE);
+			if (hdac_hdmi_parse_eld(hdev, port) < 0)
+				size = -EINVAL;
+		}
 
-	if (size > 0) {
-		port->eld.eld_valid = true;
-		port->eld.eld_size = size;
-	} else {
-		port->eld.eld_valid = false;
-		port->eld.eld_size = 0;
-	}
+		eld_valid = port->eld.eld_valid;
 
-	eld_changed = (eld_valid != port->eld.eld_valid);
+		if (size > 0) {
+			port->eld.eld_valid = true;
+			port->eld.eld_size = size;
+		} else {
+			port->eld.eld_valid = false;
+			port->eld.eld_size = 0;
+		}
 
-	pcm = hdac_hdmi_get_pcm(hdev, port);
+		eld_changed = (eld_valid != port->eld.eld_valid);
 
-	if (!port->eld.monitor_present || !port->eld.eld_valid) {
+		pcm = hdac_hdmi_get_pcm(hdev, port);
 
-		dev_dbg(&hdev->dev, "%s: disconnect for pin:port %d:%d\n",
-			__func__, pin->nid, port->id);
+		if (!port->eld.monitor_present || !port->eld.eld_valid) {
 
-		/*
-		 * PCMs are not registered during device probe, so don't
-		 * report jack here. It will be done in usermode mux
-		 * control select.
-		 */
-		if (pcm) {
-			hdac_hdmi_jack_report(pcm, port, false);
-			schedule_work(&port->dapm_work);
-		}
+			dev_dbg(&hdev->dev, "%s: disconnect for pin:port %d:%d\n",
+				__func__, pin->nid, port->id);
 
-		mutex_unlock(&hdmi->pin_mutex);
-		return;
-	}
+			/*
+			 * PCMs are not registered during device probe, so don't
+			 * report jack here. It will be done in usermode mux
+			 * control select.
+			 */
+			if (pcm) {
+				hdac_hdmi_jack_report(pcm, port, false);
+				schedule_work(&port->dapm_work);
+			}
 
-	if (port->eld.monitor_present && port->eld.eld_valid) {
-		if (pcm) {
-			hdac_hdmi_jack_report(pcm, port, true);
-			schedule_work(&port->dapm_work);
+			return;
 		}
 
-		print_hex_dump_debug("ELD: ", DUMP_PREFIX_OFFSET, 16, 1,
-			  port->eld.eld_buffer, port->eld.eld_size, false);
+		if (port->eld.monitor_present && port->eld.eld_valid) {
+			if (pcm) {
+				hdac_hdmi_jack_report(pcm, port, true);
+				schedule_work(&port->dapm_work);
+			}
 
+			print_hex_dump_debug("ELD: ", DUMP_PREFIX_OFFSET, 16, 1,
+					     port->eld.eld_buffer, port->eld.eld_size, false);
+		}
 	}
-	mutex_unlock(&hdmi->pin_mutex);
 
 	if (eld_changed && pcm)
 		snd_ctl_notify(hdmi->card,
@@ -1795,13 +1793,12 @@ static void hdac_hdmi_set_chmap(struct hdac_device *hdev, int pcm_idx,
 	if (list_empty(&pcm->port_list))
 		return;
 
-	mutex_lock(&pcm->lock);
+	guard(mutex)(&pcm->lock);
 	pcm->chmap_set = true;
 	memcpy(pcm->chmap, chmap, ARRAY_SIZE(pcm->chmap));
 	list_for_each_entry(port, &pcm->port_list, head)
 		if (prepared)
 			hdac_hdmi_setup_audio_infoframe(hdev, pcm, port);
-	mutex_unlock(&pcm->lock);
 }
 
 static bool is_hdac_hdmi_pcm_attached(struct hdac_device *hdev, int pcm_idx)
-- 
2.43.0