From 071106ecf68c401173c58808b1cf5f68cc50d390 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Fri, 05 Jan 2024 08:39:27 +0000
Subject: [PATCH] change wifi driver to cypress

---
 kernel/sound/core/seq/oss/seq_oss_midi.c |   52 +++++++++++++++++++++++++---------------------------
 1 files changed, 25 insertions(+), 27 deletions(-)

diff --git a/kernel/sound/core/seq/oss/seq_oss_midi.c b/kernel/sound/core/seq/oss/seq_oss_midi.c
index b7bef25..be80ce7 100644
--- a/kernel/sound/core/seq/oss/seq_oss_midi.c
+++ b/kernel/sound/core/seq/oss/seq_oss_midi.c
@@ -1,23 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * OSS compatible sequencer driver
  *
  * MIDI device handlers
  *
  * Copyright (C) 1998,99 Takashi Iwai <tiwai@suse.de>
- *
- * 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 <sound/asoundef.h>
@@ -50,6 +37,7 @@
 	struct snd_midi_event *coder;	/* MIDI event coder */
 	struct seq_oss_devinfo *devinfo;	/* assigned OSSseq device */
 	snd_use_lock_t use_lock;
+	struct mutex open_mutex;
 };
 
 
@@ -184,6 +172,7 @@
 	mdev->flags = pinfo->capability;
 	mdev->opened = 0;
 	snd_use_lock_init(&mdev->use_lock);
+	mutex_init(&mdev->open_mutex);
 
 	/* copy and truncate the name of synth device */
 	strlcpy(mdev->name, pinfo->name, sizeof(mdev->name));
@@ -280,7 +269,9 @@
 void
 snd_seq_oss_midi_setup(struct seq_oss_devinfo *dp)
 {
+	spin_lock_irq(&register_lock);
 	dp->max_mididev = max_midi_devs;
+	spin_unlock_irq(&register_lock);
 }
 
 /*
@@ -330,14 +321,16 @@
 	int perm;
 	struct seq_oss_midi *mdev;
 	struct snd_seq_port_subscribe subs;
+	int err;
 
 	if ((mdev = get_mididev(dp, dev)) == NULL)
 		return -ENODEV;
 
+	mutex_lock(&mdev->open_mutex);
 	/* already used? */
 	if (mdev->opened && mdev->devinfo != dp) {
-		snd_use_lock_free(&mdev->use_lock);
-		return -EBUSY;
+		err = -EBUSY;
+		goto unlock;
 	}
 
 	perm = 0;
@@ -347,14 +340,14 @@
 		perm |= PERM_READ;
 	perm &= mdev->flags;
 	if (perm == 0) {
-		snd_use_lock_free(&mdev->use_lock);
-		return -ENXIO;
+		err = -ENXIO;
+		goto unlock;
 	}
 
 	/* already opened? */
 	if ((mdev->opened & perm) == perm) {
-		snd_use_lock_free(&mdev->use_lock);
-		return 0;
+		err = 0;
+		goto unlock;
 	}
 
 	perm &= ~mdev->opened;
@@ -379,13 +372,17 @@
 	}
 
 	if (! mdev->opened) {
-		snd_use_lock_free(&mdev->use_lock);
-		return -ENXIO;
+		err = -ENXIO;
+		goto unlock;
 	}
 
 	mdev->devinfo = dp;
+	err = 0;
+
+ unlock:
+	mutex_unlock(&mdev->open_mutex);
 	snd_use_lock_free(&mdev->use_lock);
-	return 0;
+	return err;
 }
 
 /*
@@ -399,10 +396,9 @@
 
 	if ((mdev = get_mididev(dp, dev)) == NULL)
 		return -ENODEV;
-	if (! mdev->opened || mdev->devinfo != dp) {
-		snd_use_lock_free(&mdev->use_lock);
-		return 0;
-	}
+	mutex_lock(&mdev->open_mutex);
+	if (!mdev->opened || mdev->devinfo != dp)
+		goto unlock;
 
 	memset(&subs, 0, sizeof(subs));
 	if (mdev->opened & PERM_WRITE) {
@@ -421,6 +417,8 @@
 	mdev->opened = 0;
 	mdev->devinfo = NULL;
 
+ unlock:
+	mutex_unlock(&mdev->open_mutex);
 	snd_use_lock_free(&mdev->use_lock);
 	return 0;
 }

--
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