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

Signed-off-by: Matthias Kaehlcke <matthias.kaehlcke@gmai...>

--

diff --git a/drivers/net/ppp_synctty.c b/drivers/net/ppp_synctty.c
index f0c6a19..f7472c8 100644
--- a/drivers/net/ppp_synctty.c
+++ b/drivers/net/ppp_synctty.c
@@ -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);

--
Matthias Kaehlcke
Linux System Developer
Barcelona

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