From a5969cabbb4660eab42b6ef0412cbbd1200cf14d Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Sat, 12 Oct 2024 07:10:09 +0000
Subject: [PATCH] 修改led为gpio
---
kernel/sound/core/sound_oss.c | 30 ++++++++++--------------------
1 files changed, 10 insertions(+), 20 deletions(-)
diff --git a/kernel/sound/core/sound_oss.c b/kernel/sound/core/sound_oss.c
index 0a5c662..99874e8 100644
--- a/kernel/sound/core/sound_oss.c
+++ b/kernel/sound/core/sound_oss.c
@@ -1,22 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Advanced Linux Sound Architecture
* Copyright (c) by Jaroslav Kysela <perex@perex.cz>
- *
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- *
*/
#include <linux/init.h>
@@ -177,7 +162,6 @@
mutex_unlock(&sound_oss_mutex);
return -ENOENT;
}
- unregister_sound_special(minor);
switch (SNDRV_MINOR_OSS_DEVICE(minor)) {
case SNDRV_MINOR_OSS_PCM:
track2 = SNDRV_MINOR_OSS(cidx, SNDRV_MINOR_OSS_AUDIO);
@@ -189,12 +173,18 @@
track2 = SNDRV_MINOR_OSS(cidx, SNDRV_MINOR_OSS_DMMIDI1);
break;
}
- if (track2 >= 0) {
- unregister_sound_special(track2);
+ if (track2 >= 0)
snd_oss_minors[track2] = NULL;
- }
snd_oss_minors[minor] = NULL;
mutex_unlock(&sound_oss_mutex);
+
+ /* call unregister_sound_special() outside sound_oss_mutex;
+ * otherwise may deadlock, as it can trigger the release of a card
+ */
+ unregister_sound_special(minor);
+ if (track2 >= 0)
+ unregister_sound_special(track2);
+
kfree(mptr);
return 0;
}
--
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