kernel/0212-feat-add-audio-proc-mutex.patch

From 2d5c278a87080089d00780ae09eaeea9b168ccca Mon Sep 17 00:00:00 2001
From: yangqiang <yangqiang1@eswincomputing.com>
Date: Fri, 8 Nov 2024 14:56:51 +0800
Subject: [PATCH 212/219] feat:add audio proc mutex.

Changelogs:
add audio proc mutex.

Signed-off-by: yangqiang <yangqiang1@eswincomputing.com>
---
 sound/soc/eswin/esw-audio-proc.c | 17 ++++++++++++++---
 1 file changed, 14 insertions(+), 3 deletions(-)

diff --git a/sound/soc/eswin/esw-audio-proc.c b/sound/soc/eswin/esw-audio-proc.c
index f0c0cbe10f56..83c3bbb26c73 100644
--- a/sound/soc/eswin/esw-audio-proc.c
+++ b/sound/soc/eswin/esw-audio-proc.c
@@ -27,6 +27,7 @@
 #include <linux/eventfd.h>
 #include <linux/ioctl.h>
 #include <linux/device.h>
+#include <linux/mutex.h>
 
 // proc data definition
 typedef enum
@@ -79,6 +80,7 @@ static int audio_proc_major[NUM_DEVICES] = {0};
 static struct class *audio_proc_class = NULL;
 static struct device *audio_proc_device[NUM_DEVICES] = {NULL};
 static int32_t *g_perf_data[NUM_DEVICES] = {NULL};
+static DEFINE_MUTEX(audio_proc_lock);
 
 static void show_aenc_data(struct seq_file *m)
 {
@@ -393,14 +395,16 @@ int audio_proc_module_init(void)
 	int i, ret;
 	struct device *dev;
 
+	mutex_lock(&audio_proc_lock);
+
 	if (g_proc_initialized) {
+		mutex_unlock(&audio_proc_lock);
 		return 0;
 	}
 
-	pr_info("audio_proc_module_init enter.\n");
-
 	audio_proc_class = class_create("audio_proc_class");
 	if (IS_ERR(audio_proc_class)) {
+		mutex_unlock(&audio_proc_lock);
 		pr_err("Failed to create audio_proc_class\n");
 		return PTR_ERR(audio_proc_class);
 	}
@@ -435,7 +439,9 @@ int audio_proc_module_init(void)
 
 	g_proc_initialized = true;
 
-	pr_info("es_audio_proc: initialized\n");
+	mutex_unlock(&audio_proc_lock);
+	pr_info("es_audio_proc:initialized\n");
+
 	return 0;
 
 cleanup:
@@ -455,6 +461,7 @@ int audio_proc_module_init(void)
 	}
 
 	class_destroy(audio_proc_class);
+	mutex_unlock(&audio_proc_lock);
 	return ret;
 }
 
@@ -464,6 +471,8 @@ void audio_proc_module_exit(void)
 {
 	int i;
 
+	mutex_lock(&audio_proc_lock);
+
 	if (g_proc_uninitialized) {
 		return;
 	}
@@ -480,5 +489,7 @@ void audio_proc_module_exit(void)
 
 	g_proc_uninitialized = true;
 
+	mutex_unlock(&audio_proc_lock);
+
 	pr_info("es_audio_proc: uninitialized\n");
 }
-- 
2.47.0