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| author | Matthias Kaehlcke <matthias.kaehlcke@gmail.com> | 2007-05-08 00:32:43 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-05-08 11:15:17 -0700 |
| commit | 9ea6e5d8088096aeba29b6778c3d3d82fb495e9f (patch) | |
| tree | e348ee1acd60db62dfb95de8b99a11de20ce3ce6 /drivers | |
| parent | a7e27d5dd396419dc6d6288db6a6d86cf3a94ba5 (diff) | |
| download | linux-9ea6e5d8088096aeba29b6778c3d3d82fb495e9f.tar.bz2 | |
use mutex instead of semaphore in CAPI 2.0 interface
The CAPI 2.0 interface uses a semaphore as mutex. Use the mutex API instead
of the (binary) semaphore.
Signed-off-by: Matthias Kaehlcke <matthias.kaehlcke@gmail.com>
Cc: Karsten Keil <kkeil@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/isdn/capi/capi.c | 33 |
1 files changed, 17 insertions, 16 deletions
diff --git a/drivers/isdn/capi/capi.c b/drivers/isdn/capi/capi.c index 484745e30119..81661b8bd3a8 100644 --- a/drivers/isdn/capi/capi.c +++ b/drivers/isdn/capi/capi.c @@ -18,6 +18,7 @@ #include <linux/fcntl.h> #include <linux/fs.h> #include <linux/signal.h> +#include <linux/mutex.h> #include <linux/mm.h> #include <linux/timer.h> #include <linux/wait.h> @@ -146,7 +147,7 @@ struct capidev { struct capincci *nccis; - struct semaphore ncci_list_sem; + struct mutex ncci_list_mtx; }; /* -------- global variables ---------------------------------------- */ @@ -394,7 +395,7 @@ static struct capidev *capidev_alloc(void) if (!cdev) return NULL; - init_MUTEX(&cdev->ncci_list_sem); + mutex_init(&cdev->ncci_list_mtx); skb_queue_head_init(&cdev->recvqueue); init_waitqueue_head(&cdev->recvwait); write_lock_irqsave(&capidev_list_lock, flags); @@ -413,9 +414,9 @@ static void capidev_free(struct capidev *cdev) } skb_queue_purge(&cdev->recvqueue); - down(&cdev->ncci_list_sem); + mutex_lock(&cdev->ncci_list_mtx); capincci_free(cdev, 0xffffffff); - up(&cdev->ncci_list_sem); + mutex_unlock(&cdev->ncci_list_mtx); write_lock_irqsave(&capidev_list_lock, flags); list_del(&cdev->list); @@ -602,15 +603,15 @@ static void capi_recv_message(struct capi20_appl *ap, struct sk_buff *skb) if (CAPIMSG_CMD(skb->data) == CAPI_CONNECT_B3_CONF) { u16 info = CAPIMSG_U16(skb->data, 12); // Info field if (info == 0) { - down(&cdev->ncci_list_sem); + mutex_lock(&cdev->ncci_list_mtx); capincci_alloc(cdev, CAPIMSG_NCCI(skb->data)); - up(&cdev->ncci_list_sem); + mutex_unlock(&cdev->ncci_list_mtx); } } if (CAPIMSG_CMD(skb->data) == CAPI_CONNECT_B3_IND) { - down(&cdev->ncci_list_sem); + mutex_lock(&cdev->ncci_list_mtx); capincci_alloc(cdev, CAPIMSG_NCCI(skb->data)); - up(&cdev->ncci_list_sem); + mutex_unlock(&cdev->ncci_list_mtx); } spin_lock_irqsave(&workaround_lock, flags); if (CAPIMSG_COMMAND(skb->data) != CAPI_DATA_B3) { @@ -751,9 +752,9 @@ capi_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos CAPIMSG_SETAPPID(skb->data, cdev->ap.applid); if (CAPIMSG_CMD(skb->data) == CAPI_DISCONNECT_B3_RESP) { - down(&cdev->ncci_list_sem); + mutex_lock(&cdev->ncci_list_mtx); capincci_free(cdev, CAPIMSG_NCCI(skb->data)); - up(&cdev->ncci_list_sem); + mutex_unlock(&cdev->ncci_list_mtx); } cdev->errcode = capi20_put_message(&cdev->ap, skb); @@ -938,9 +939,9 @@ capi_ioctl(struct inode *inode, struct file *file, if (copy_from_user(&ncci, argp, sizeof(ncci))) return -EFAULT; - down(&cdev->ncci_list_sem); + mutex_lock(&cdev->ncci_list_mtx); if ((nccip = capincci_find(cdev, (u32) ncci)) == 0) { - up(&cdev->ncci_list_sem); + mutex_unlock(&cdev->ncci_list_mtx); return 0; } #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE @@ -948,7 +949,7 @@ capi_ioctl(struct inode *inode, struct file *file, count += atomic_read(&mp->ttyopencount); } #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */ - up(&cdev->ncci_list_sem); + mutex_unlock(&cdev->ncci_list_mtx); return count; } return 0; @@ -963,14 +964,14 @@ capi_ioctl(struct inode *inode, struct file *file, if (copy_from_user(&ncci, argp, sizeof(ncci))) return -EFAULT; - down(&cdev->ncci_list_sem); + mutex_lock(&cdev->ncci_list_mtx); nccip = capincci_find(cdev, (u32) ncci); if (!nccip || (mp = nccip->minorp) == 0) { - up(&cdev->ncci_list_sem); + mutex_unlock(&cdev->ncci_list_mtx); return -ESRCH; } unit = mp->minor; - up(&cdev->ncci_list_sem); + mutex_unlock(&cdev->ncci_list_mtx); return unit; } return 0; |