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[PPP] synchronous tty: convert dead_sem to completion 

PPP synchronous tty channel driver: convert the semaphore dead_sem to a
completion

Signed-off-by: Matthias Kaehlcke <matthias.kaehlcke@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Matthias Kaehlcke 2007-12-14 11:32:48 -08:00 committed by David S. Miller
parent 9055e051b8
commit 5e41fb8321
1 changed files with 5 additions and 5 deletions
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10
drivers/net/ppp_synctty.c
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@ -42,9 +42,9 @@
#include <linux/if_ppp.h>
#include <linux/ppp_channel.h>
#include <linux/spinlock.h>
#include <linux/completion.h>
#include <linux/init.h>
#include <asm/uaccess.h>
#include <asm/semaphore.h>
#define PPP_VERSION "2.4.2"
@ -70,7 +70,7 @@ struct syncppp {
struct tasklet_struct tsk;
atomic_t refcnt;
struct semaphore dead_sem;
struct completion dead_cmp;
struct ppp_channel chan; /* interface to generic ppp layer */
};
@ -195,7 +195,7 @@ static struct syncppp *sp_get(struct tty_struct *tty)
static void sp_put(struct syncppp *ap)
{
if (atomic_dec_and_test(&ap->refcnt))
up(&ap->dead_sem);
complete(&ap->dead_cmp);
}
/*
@ -225,7 +225,7 @@ ppp_sync_open(struct tty_struct *tty)
tasklet_init(&ap->tsk, ppp_sync_process, (unsigned long) ap);
atomic_set(&ap->refcnt, 1);
init_MUTEX_LOCKED(&ap->dead_sem);
init_completion(&ap->dead_cmp);
ap->chan.private = ap;
ap->chan.ops = &sync_ops;
@ -273,7 +273,7 @@ ppp_sync_close(struct tty_struct *tty)
* by the time it returns.
*/
if (!atomic_dec_and_test(&ap->refcnt))
down(&ap->dead_sem);
wait_for_completion(&ap->dead_cmp);
tasklet_kill(&ap->tsk);
ppp_unregister_channel(&ap->chan);