From 2f7c68cb55ecb7331f2381deb497c27155f32faf Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Wed, 03 Jan 2024 09:43:39 +0000
Subject: [PATCH] update kernel to 5.10.198
---
kernel/sound/core/seq/oss/seq_oss_midi.c | 35 ++++++++++++++++++++++-------------
1 files changed, 22 insertions(+), 13 deletions(-)
diff --git a/kernel/sound/core/seq/oss/seq_oss_midi.c b/kernel/sound/core/seq/oss/seq_oss_midi.c
index f73ee07..be80ce7 100644
--- a/kernel/sound/core/seq/oss/seq_oss_midi.c
+++ b/kernel/sound/core/seq/oss/seq_oss_midi.c
@@ -37,6 +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;
};
@@ -171,6 +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));
@@ -319,14 +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;
@@ -336,14 +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;
@@ -368,13 +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;
}
/*
@@ -388,10 +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) {
@@ -410,6 +417,8 @@
mdev->opened = 0;
mdev->devinfo = NULL;
+ unlock:
+ mutex_unlock(&mdev->open_mutex);
snd_use_lock_free(&mdev->use_lock);
return 0;
}
--
Gitblit v1.6.2