From abfd1dc7c18e4be89715071a524324c7b2515565 Mon Sep 17 00:00:00 2001 From: Tilman Schmidt Date: Mon, 10 Apr 2006 22:55:12 -0700 Subject: [PATCH] [PATCH] isdn4linux: Siemens Gigaset drivers: mutex conversion With Hansjoerg Lipp Convert the semaphores used by the Gigaset drivers to mutexes. Signed-off-by: Hansjoerg Lipp Signed-off-by: Tilman Schmidt Cc: Karsten Keil Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/isdn/gigaset/common.c | 26 ++++++++++--------- drivers/isdn/gigaset/gigaset.h | 2 +- drivers/isdn/gigaset/interface.c | 44 ++++++++++++++++---------------- drivers/isdn/gigaset/proc.c | 6 ++--- 4 files changed, 40 insertions(+), 38 deletions(-) diff --git a/drivers/isdn/gigaset/common.c b/drivers/isdn/gigaset/common.c index e9bfcfd9f11..c3c9804796c 100644 --- a/drivers/isdn/gigaset/common.c +++ b/drivers/isdn/gigaset/common.c @@ -408,7 +408,7 @@ void gigaset_freecs(struct cardstate *cs) if (!cs) return; - down(&cs->sem); + mutex_lock(&cs->mutex); if (!cs->bcs) goto f_cs; @@ -459,7 +459,7 @@ void gigaset_freecs(struct cardstate *cs) f_bcs: gig_dbg(DEBUG_INIT, "freeing bcs[]"); kfree(cs->bcs); f_cs: gig_dbg(DEBUG_INIT, "freeing cs"); - up(&cs->sem); + mutex_unlock(&cs->mutex); free_cs(cs); } EXPORT_SYMBOL_GPL(gigaset_freecs); @@ -652,7 +652,9 @@ struct cardstate *gigaset_initcs(struct gigaset_driver *drv, int channels, spin_lock_init(&cs->ev_lock); atomic_set(&cs->ev_tail, 0); atomic_set(&cs->ev_head, 0); - init_MUTEX_LOCKED(&cs->sem); + mutex_init(&cs->mutex); + mutex_lock(&cs->mutex); + tasklet_init(&cs->event_tasklet, &gigaset_handle_event, (unsigned long) cs); atomic_set(&cs->commands_pending, 0); @@ -729,11 +731,11 @@ struct cardstate *gigaset_initcs(struct gigaset_driver *drv, int channels, add_timer(&cs->timer); gig_dbg(DEBUG_INIT, "cs initialized"); - up(&cs->sem); + mutex_unlock(&cs->mutex); return cs; error: if (cs) - up(&cs->sem); + mutex_unlock(&cs->mutex); gig_dbg(DEBUG_INIT, "failed"); gigaset_freecs(cs); return NULL; @@ -831,7 +833,7 @@ static void cleanup_cs(struct cardstate *cs) int gigaset_start(struct cardstate *cs) { - if (down_interruptible(&cs->sem)) + if (mutex_lock_interruptible(&cs->mutex)) return 0; atomic_set(&cs->connected, 1); @@ -861,18 +863,18 @@ int gigaset_start(struct cardstate *cs) /* set up device sysfs */ gigaset_init_dev_sysfs(cs); - up(&cs->sem); + mutex_unlock(&cs->mutex); return 1; error: - up(&cs->sem); + mutex_unlock(&cs->mutex); return 0; } EXPORT_SYMBOL_GPL(gigaset_start); void gigaset_shutdown(struct cardstate *cs) { - down(&cs->sem); + mutex_lock(&cs->mutex); cs->waiting = 1; @@ -902,13 +904,13 @@ void gigaset_shutdown(struct cardstate *cs) cleanup_cs(cs); exit: - up(&cs->sem); + mutex_unlock(&cs->mutex); } EXPORT_SYMBOL_GPL(gigaset_shutdown); void gigaset_stop(struct cardstate *cs) { - down(&cs->sem); + mutex_lock(&cs->mutex); /* clear device sysfs */ gigaset_free_dev_sysfs(cs); @@ -936,7 +938,7 @@ void gigaset_stop(struct cardstate *cs) cleanup_cs(cs); exit: - up(&cs->sem); + mutex_unlock(&cs->mutex); } EXPORT_SYMBOL_GPL(gigaset_stop); diff --git a/drivers/isdn/gigaset/gigaset.h b/drivers/isdn/gigaset/gigaset.h index 7a44caca8a1..12153acc23e 100644 --- a/drivers/isdn/gigaset/gigaset.h +++ b/drivers/isdn/gigaset/gigaset.h @@ -497,7 +497,7 @@ struct cardstate { int cs_init; int ignoreframes; /* frames to ignore after setting up the B channel */ - struct semaphore sem; /* locks this structure: + struct mutex mutex; /* locks this structure: * connected is not changed, * hardware_up is not changed, * MState is not changed to or from diff --git a/drivers/isdn/gigaset/interface.c b/drivers/isdn/gigaset/interface.c index 25750864d20..ac408acaaf1 100644 --- a/drivers/isdn/gigaset/interface.c +++ b/drivers/isdn/gigaset/interface.c @@ -160,7 +160,7 @@ static int if_open(struct tty_struct *tty, struct file *filp) if (!cs) return -ENODEV; - if (down_interruptible(&cs->sem)) + if (mutex_lock_interruptible(&cs->mutex)) return -ERESTARTSYS; // FIXME -EINTR? tty->driver_data = cs; @@ -173,7 +173,7 @@ static int if_open(struct tty_struct *tty, struct file *filp) tty->low_latency = 1; //FIXME test } - up(&cs->sem); + mutex_unlock(&cs->mutex); return 0; } @@ -190,7 +190,7 @@ static void if_close(struct tty_struct *tty, struct file *filp) gig_dbg(DEBUG_IF, "%u: %s()", cs->minor_index, __func__); - down(&cs->sem); + mutex_lock(&cs->mutex); if (!cs->open_count) warn("%s: device not opened", __func__); @@ -202,7 +202,7 @@ static void if_close(struct tty_struct *tty, struct file *filp) } } - up(&cs->sem); + mutex_unlock(&cs->mutex); } static int if_ioctl(struct tty_struct *tty, struct file *file, @@ -222,7 +222,7 @@ static int if_ioctl(struct tty_struct *tty, struct file *file, gig_dbg(DEBUG_IF, "%u: %s(0x%x)", cs->minor_index, __func__, cmd); - if (down_interruptible(&cs->sem)) + if (mutex_lock_interruptible(&cs->mutex)) return -ERESTARTSYS; // FIXME -EINTR? if (!cs->open_count) @@ -279,7 +279,7 @@ static int if_ioctl(struct tty_struct *tty, struct file *file, } } - up(&cs->sem); + mutex_unlock(&cs->mutex); return retval; } @@ -297,13 +297,13 @@ static int if_tiocmget(struct tty_struct *tty, struct file *file) gig_dbg(DEBUG_IF, "%u: %s()", cs->minor_index, __func__); - if (down_interruptible(&cs->sem)) + if (mutex_lock_interruptible(&cs->mutex)) return -ERESTARTSYS; // FIXME -EINTR? // FIXME read from device? retval = cs->control_state & (TIOCM_RTS|TIOCM_DTR); - up(&cs->sem); + mutex_unlock(&cs->mutex); return retval; } @@ -324,7 +324,7 @@ static int if_tiocmset(struct tty_struct *tty, struct file *file, gig_dbg(DEBUG_IF, "%u: %s(0x%x, 0x%x)", cs->minor_index, __func__, set, clear); - if (down_interruptible(&cs->sem)) + if (mutex_lock_interruptible(&cs->mutex)) return -ERESTARTSYS; // FIXME -EINTR? if (!atomic_read(&cs->connected)) { @@ -336,7 +336,7 @@ static int if_tiocmset(struct tty_struct *tty, struct file *file, cs->control_state = mc; } - up(&cs->sem); + mutex_unlock(&cs->mutex); return retval; } @@ -354,7 +354,7 @@ static int if_write(struct tty_struct *tty, const unsigned char *buf, int count) gig_dbg(DEBUG_IF, "%u: %s()", cs->minor_index, __func__); - if (down_interruptible(&cs->sem)) + if (mutex_lock_interruptible(&cs->mutex)) return -ERESTARTSYS; // FIXME -EINTR? if (!cs->open_count) @@ -370,7 +370,7 @@ static int if_write(struct tty_struct *tty, const unsigned char *buf, int count) &cs->if_wake_tasklet); } - up(&cs->sem); + mutex_unlock(&cs->mutex); return retval; } @@ -388,7 +388,7 @@ static int if_write_room(struct tty_struct *tty) gig_dbg(DEBUG_IF, "%u: %s()", cs->minor_index, __func__); - if (down_interruptible(&cs->sem)) + if (mutex_lock_interruptible(&cs->mutex)) return -ERESTARTSYS; // FIXME -EINTR? if (!cs->open_count) @@ -402,7 +402,7 @@ static int if_write_room(struct tty_struct *tty) } else retval = cs->ops->write_room(cs); - up(&cs->sem); + mutex_unlock(&cs->mutex); return retval; } @@ -420,7 +420,7 @@ static int if_chars_in_buffer(struct tty_struct *tty) gig_dbg(DEBUG_IF, "%u: %s()", cs->minor_index, __func__); - if (down_interruptible(&cs->sem)) + if (mutex_lock_interruptible(&cs->mutex)) return -ERESTARTSYS; // FIXME -EINTR? if (!cs->open_count) @@ -434,7 +434,7 @@ static int if_chars_in_buffer(struct tty_struct *tty) } else retval = cs->ops->chars_in_buffer(cs); - up(&cs->sem); + mutex_unlock(&cs->mutex); return retval; } @@ -451,7 +451,7 @@ static void if_throttle(struct tty_struct *tty) gig_dbg(DEBUG_IF, "%u: %s()", cs->minor_index, __func__); - down(&cs->sem); + mutex_lock(&cs->mutex); if (!cs->open_count) warn("%s: device not opened", __func__); @@ -459,7 +459,7 @@ static void if_throttle(struct tty_struct *tty) //FIXME } - up(&cs->sem); + mutex_unlock(&cs->mutex); } static void if_unthrottle(struct tty_struct *tty) @@ -474,7 +474,7 @@ static void if_unthrottle(struct tty_struct *tty) gig_dbg(DEBUG_IF, "%u: %s()", cs->minor_index, __func__); - down(&cs->sem); + mutex_lock(&cs->mutex); if (!cs->open_count) warn("%s: device not opened", __func__); @@ -482,7 +482,7 @@ static void if_unthrottle(struct tty_struct *tty) //FIXME } - up(&cs->sem); + mutex_unlock(&cs->mutex); } static void if_set_termios(struct tty_struct *tty, struct termios *old) @@ -501,7 +501,7 @@ static void if_set_termios(struct tty_struct *tty, struct termios *old) gig_dbg(DEBUG_IF, "%u: %s()", cs->minor_index, __func__); - down(&cs->sem); + mutex_lock(&cs->mutex); if (!cs->open_count) { warn("%s: device not opened", __func__); @@ -586,7 +586,7 @@ static void if_set_termios(struct tty_struct *tty, struct termios *old) cs->control_state = control_state; out: - up(&cs->sem); + mutex_unlock(&cs->mutex); } diff --git a/drivers/isdn/gigaset/proc.c b/drivers/isdn/gigaset/proc.c index 912fed67074..8f124e8e604 100644 --- a/drivers/isdn/gigaset/proc.c +++ b/drivers/isdn/gigaset/proc.c @@ -37,14 +37,14 @@ static ssize_t set_cidmode(struct device *dev, struct device_attribute *attr, if (value < 0 || value > 1) return -EINVAL; - if (down_interruptible(&cs->sem)) + if (mutex_lock_interruptible(&cs->mutex)) return -ERESTARTSYS; // FIXME -EINTR? cs->waiting = 1; if (!gigaset_add_event(cs, &cs->at_state, EV_PROC_CIDMODE, NULL, value, NULL)) { cs->waiting = 0; - up(&cs->sem); + mutex_unlock(&cs->mutex); return -ENOMEM; } @@ -53,7 +53,7 @@ static ssize_t set_cidmode(struct device *dev, struct device_attribute *attr, wait_event(cs->waitqueue, !cs->waiting); - up(&cs->sem); + mutex_unlock(&cs->mutex); return count; } -- 2.20.1