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>
Acked-by: Karsten Keil <kkeil@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/drivers/isdn/i4l/isdn_common.c b/drivers/isdn/i4l/isdn_common.c
index 4910bca..c6df292 100644 (file)
--- a/drivers/isdn/i4l/isdn_common.c
+++ b/drivers/isdn/i4l/isdn_common.c
@@ -1365,7 +1365,7 @@ 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)){
@@ -1375,7 +1375,7 @@ 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 */
@@ -1384,7 +1384,7 @@ 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)){
@@ -1394,17 +1394,17 @@ 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;
@@ -1433,10 +1433,10 @@ 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;
@@ -1445,10 +1445,10 @@ 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;
@@ -1457,10 +1457,10 @@ 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;
@@ -2304,7 +2304,7 @@ 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 d5dda4b..d0ecc8e 100644 (file)
--- a/include/linux/isdn.h
+++ b/include/linux/isdn.h
@@ -167,6 +167,7 @@ typedef struct {
 #include <linux/etherdevice.h>
 #include <linux/skbuff.h>
 #include <linux/tcp.h>
+#include <linux/mutex.h>
 
 #define ISDN_TTY_MAJOR    43
 #define ISDN_TTYAUX_MAJOR 44
@@ -616,7 +617,7 @@ 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;