lkml.org 
[lkml]   [2007]   [Jul]   [29]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Date
From
Subject[PATCH 4/5] Use mutex instead of semaphore in ISDN subsystem common functions
The ISDN subsystem common functions use a semaphore as mutex. Use the
mutex API instead of the (binary) semaphore.

Signed-off-by: Matthias Kaehlcke <matthias.kaehlcke@gmail.com>

--

diff --git a/drivers/isdn/i4l/isdn_common.c b/drivers/isdn/i4l/isdn_common.c
index c97330b..a5d3db4 100644
--- a/drivers/isdn/i4l/isdn_common.c
+++ b/drivers/isdn/i4l/isdn_common.c
@@ -1364,7 +1364,7 @@ isdn_ioctl(struct inode *inode, struct file *file, uint cmd, ulong arg)
} else {
s = NULL;
}
- ret = down_interruptible(&dev->sem);
+ ret = mutex_lock_interruptible(&dev->mtx);
if( ret ) return ret;
if ((s = isdn_net_new(s, NULL))) {
if (copy_to_user(argp, s, strlen(s) + 1)){
@@ -1374,7 +1374,7 @@ isdn_ioctl(struct inode *inode, struct file *file, uint cmd, ulong arg)
}
} else
ret = -ENODEV;
- up(&dev->sem);
+ mutex_unlock(&dev->mtx);
return ret;
case IIOCNETASL:
/* Add a slave to a network-interface */
@@ -1383,7 +1383,7 @@ isdn_ioctl(struct inode *inode, struct file *file, uint cmd, ulong arg)
return -EFAULT;
} else
return -EINVAL;
- ret = down_interruptible(&dev->sem);
+ ret = mutex_lock_interruptible(&dev->mtx);
if( ret ) return ret;
if ((s = isdn_net_newslave(bname))) {
if (copy_to_user(argp, s, strlen(s) + 1)){
@@ -1393,17 +1393,17 @@ isdn_ioctl(struct inode *inode, struct file *file, uint cmd, ulong arg)
}
} else
ret = -ENODEV;
- up(&dev->sem);
+ mutex_unlock(&dev->mtx);
return ret;
case IIOCNETDIF:
/* Delete a network-interface */
if (arg) {
if (copy_from_user(name, argp, sizeof(name)))
return -EFAULT;
- ret = down_interruptible(&dev->sem);
+ ret = mutex_lock_interruptible(&dev->mtx);
if( ret ) return ret;
ret = isdn_net_rm(name);
- up(&dev->sem);
+ mutex_unlock(&dev->mtx);
return ret;
} else
return -EINVAL;
@@ -1432,10 +1432,10 @@ isdn_ioctl(struct inode *inode, struct file *file, uint cmd, ulong arg)
if (arg) {
if (copy_from_user(&phone, argp, sizeof(phone)))
return -EFAULT;
- ret = down_interruptible(&dev->sem);
+ ret = mutex_lock_interruptible(&dev->mtx);
if( ret ) return ret;
ret = isdn_net_addphone(&phone);
- up(&dev->sem);
+ mutex_unlock(&dev->mtx);
return ret;
} else
return -EINVAL;
@@ -1444,10 +1444,10 @@ isdn_ioctl(struct inode *inode, struct file *file, uint cmd, ulong arg)
if (arg) {
if (copy_from_user(&phone, argp, sizeof(phone)))
return -EFAULT;
- ret = down_interruptible(&dev->sem);
+ ret = mutex_lock_interruptible(&dev->mtx);
if( ret ) return ret;
ret = isdn_net_getphones(&phone, argp);
- up(&dev->sem);
+ mutex_unlock(&dev->mtx);
return ret;
} else
return -EINVAL;
@@ -1456,10 +1456,10 @@ isdn_ioctl(struct inode *inode, struct file *file, uint cmd, ulong arg)
if (arg) {
if (copy_from_user(&phone, argp, sizeof(phone)))
return -EFAULT;
- ret = down_interruptible(&dev->sem);
+ ret = mutex_lock_interruptible(&dev->mtx);
if( ret ) return ret;
ret = isdn_net_delphone(&phone);
- up(&dev->sem);
+ mutex_unlock(&dev->mtx);
return ret;
} else
return -EINVAL;
@@ -2303,7 +2303,7 @@ static int __init isdn_init(void)
#ifdef MODULE
dev->owner = THIS_MODULE;
#endif
- init_MUTEX(&dev->sem);
+ mutex_init(&dev->mtx);
init_waitqueue_head(&dev->info_waitq);
for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
dev->drvmap[i] = -1;
diff --git a/include/linux/isdn.h b/include/linux/isdn.h
index 3c7875b..5a77203 100644
--- a/include/linux/isdn.h
+++ b/include/linux/isdn.h
@@ -15,6 +15,7 @@
#define __ISDN_H__

#include <linux/ioctl.h>
+#include <linux/mutex.h>

#ifdef CONFIG_COBALT_MICRO_SERVER
/* Save memory */
@@ -624,7 +625,7 @@ typedef struct isdn_devt {
int v110emu[ISDN_MAX_CHANNELS]; /* V.110 emulator-mode 0=none */
atomic_t v110use[ISDN_MAX_CHANNELS]; /* Usage-Semaphore for stream */
isdn_v110_stream *v110[ISDN_MAX_CHANNELS]; /* V.110 private data */
- struct semaphore sem; /* serialize list access*/
+ struct mutex mtx; /* serialize list access*/
unsigned long global_features;
} isdn_dev;

--
Matthias Kaehlcke
Linux Application Developer
Barcelona
Tant qu'il y aura sur terre des hommes pour qui existe un concept
d' 'honneur national', la menace d'une nouvelle guerre subsistera.
(B. Traven)
.''`.
using free software / Debian GNU/Linux | http://debian.org : :' :
`. `'`
gpg --keyserver pgp.mit.edu --recv-keys 47D8E5D4 `-
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
\
 
 \ /
  Last update: 2007-07-29 23:43    [W:0.083 / U:0.316 seconds]
©2003-2017 Jasper Spaans. hosted at Digital OceanAdvertise on this site