From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1031174AbXDZKyW (ORCPT ); Thu, 26 Apr 2007 06:54:22 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1031170AbXDZKyV (ORCPT ); Thu, 26 Apr 2007 06:54:21 -0400 Received: from static-141-230-6-89.ipcom.comunitel.net ([89.6.230.141]:59617 "EHLO traven.no-ip.org" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1031177AbXDZKyM (ORCPT ); Thu, 26 Apr 2007 06:54:12 -0400 Date: Thu, 26 Apr 2007 12:57:05 +0200 From: Matthias Kaehlcke To: kkeil@suse.de, kai.germaschewski@gmx.de Cc: isdn4linux@listserv.isdn4linux.de, linux-kernel@vger.kernel.org Subject: [PATCH] use mutex instead of semaphore in CAPI 2.0 interface Message-ID: <20070426105705.GD6468@traven> Mail-Followup-To: Matthias Kaehlcke , kkeil@suse.de, kai.germaschewski@gmx.de, isdn4linux@listserv.isdn4linux.de, linux-kernel@vger.kernel.org MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.5.13 (2006-08-11) Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org the CAPI 2.0 interface uses a semaphore as mutex. use the mutex API instead of the (binary) semaphore Signed-off-by: Matthias Kaehlcke -- diff --git a/drivers/isdn/capi/capi.c b/drivers/isdn/capi/capi.c index db1260f..b260bdc 100644 --- a/drivers/isdn/capi/capi.c +++ b/drivers/isdn/capi/capi.c @@ -147,7 +147,7 @@ struct capidev { struct capincci *nccis; - struct semaphore ncci_list_sem; + struct mutex ncci_list_mtx; }; /* -------- global variables ---------------------------------------- */ @@ -395,7 +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); @@ -414,9 +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); @@ -603,15 +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) { @@ -752,9 +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); @@ -939,9 +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 @@ -949,7 +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; @@ -964,14 +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; -- Matthias Kaehlcke Linux Application Developer Barcelona Usually when people are sad, they don't do anything. They just cry over their condition. But when they get angry, they bring about a change (Malcolm X) .''`. using free software / Debian GNU/Linux | http://debian.org : :' : `. `'` gpg --keyserver pgp.mit.edu --recv-keys 47D8E5D4 `-