From 21fab4a86a411c18c6b4d663ae710ca1f6206b3c Mon Sep 17 00:00:00 2001 From: Jarek Poplawski Date: Mon, 11 Feb 2008 21:36:39 -0800 Subject: [PATCH] [AX25] ax25_timer: use mod_timer instead of add_timer According to one of Jann's OOPS reports it looks like BUG_ON(timer_pending(timer)) triggers during add_timer() in ax25_start_t1timer(). This patch changes current use of: init_timer(), add_timer() and del_timer() to setup_timer() with mod_timer(), which should be safer anyway. Reported-by: Jann Traschewski Signed-off-by: Jarek Poplawski Signed-off-by: David S. Miller --- include/net/ax25.h | 1 + net/ax25/af_ax25.c | 6 +---- net/ax25/ax25_timer.c | 60 +++++++++++++++---------------------------- 3 files changed, 23 insertions(+), 44 deletions(-) diff --git a/include/net/ax25.h b/include/net/ax25.h index 32a57e1dee3a..3f0236f1d23e 100644 --- a/include/net/ax25.h +++ b/include/net/ax25.h @@ -416,6 +416,7 @@ extern void ax25_calculate_rtt(ax25_cb *); extern void ax25_disconnect(ax25_cb *, int); /* ax25_timer.c */ +extern void ax25_setup_timers(ax25_cb *); extern void ax25_start_heartbeat(ax25_cb *); extern void ax25_start_t1timer(ax25_cb *); extern void ax25_start_t2timer(ax25_cb *); diff --git a/net/ax25/af_ax25.c b/net/ax25/af_ax25.c index 5a4337a29094..48bfcc741f25 100644 --- a/net/ax25/af_ax25.c +++ b/net/ax25/af_ax25.c @@ -510,11 +510,7 @@ ax25_cb *ax25_create_cb(void) skb_queue_head_init(&ax25->ack_queue); skb_queue_head_init(&ax25->reseq_queue); - init_timer(&ax25->timer); - init_timer(&ax25->t1timer); - init_timer(&ax25->t2timer); - init_timer(&ax25->t3timer); - init_timer(&ax25->idletimer); + ax25_setup_timers(ax25); ax25_fillin_cb(ax25, NULL); diff --git a/net/ax25/ax25_timer.c b/net/ax25/ax25_timer.c index 72594867fab6..db29ea71e80a 100644 --- a/net/ax25/ax25_timer.c +++ b/net/ax25/ax25_timer.c @@ -40,63 +40,45 @@ static void ax25_t2timer_expiry(unsigned long); static void ax25_t3timer_expiry(unsigned long); static void ax25_idletimer_expiry(unsigned long); +void ax25_setup_timers(ax25_cb *ax25) +{ + setup_timer(&ax25->timer, ax25_heartbeat_expiry, (unsigned long)ax25); + setup_timer(&ax25->t1timer, ax25_t1timer_expiry, (unsigned long)ax25); + setup_timer(&ax25->t2timer, ax25_t2timer_expiry, (unsigned long)ax25); + setup_timer(&ax25->t3timer, ax25_t3timer_expiry, (unsigned long)ax25); + setup_timer(&ax25->idletimer, ax25_idletimer_expiry, + (unsigned long)ax25); +} + void ax25_start_heartbeat(ax25_cb *ax25) { - del_timer(&ax25->timer); - - ax25->timer.data = (unsigned long)ax25; - ax25->timer.function = &ax25_heartbeat_expiry; - ax25->timer.expires = jiffies + 5 * HZ; - - add_timer(&ax25->timer); + mod_timer(&ax25->timer, jiffies + 5 * HZ); } void ax25_start_t1timer(ax25_cb *ax25) { - del_timer(&ax25->t1timer); - - ax25->t1timer.data = (unsigned long)ax25; - ax25->t1timer.function = &ax25_t1timer_expiry; - ax25->t1timer.expires = jiffies + ax25->t1; - - add_timer(&ax25->t1timer); + mod_timer(&ax25->t1timer, jiffies + ax25->t1); } void ax25_start_t2timer(ax25_cb *ax25) { - del_timer(&ax25->t2timer); - - ax25->t2timer.data = (unsigned long)ax25; - ax25->t2timer.function = &ax25_t2timer_expiry; - ax25->t2timer.expires = jiffies + ax25->t2; - - add_timer(&ax25->t2timer); + mod_timer(&ax25->t2timer, jiffies + ax25->t2); } void ax25_start_t3timer(ax25_cb *ax25) { - del_timer(&ax25->t3timer); - - if (ax25->t3 > 0) { - ax25->t3timer.data = (unsigned long)ax25; - ax25->t3timer.function = &ax25_t3timer_expiry; - ax25->t3timer.expires = jiffies + ax25->t3; - - add_timer(&ax25->t3timer); - } + if (ax25->t3 > 0) + mod_timer(&ax25->t3timer, jiffies + ax25->t3); + else + del_timer(&ax25->t3timer); } void ax25_start_idletimer(ax25_cb *ax25) { - del_timer(&ax25->idletimer); - - if (ax25->idle > 0) { - ax25->idletimer.data = (unsigned long)ax25; - ax25->idletimer.function = &ax25_idletimer_expiry; - ax25->idletimer.expires = jiffies + ax25->idle; - - add_timer(&ax25->idletimer); - } + if (ax25->idle > 0) + mod_timer(&ax25->idletimer, jiffies + ax25->idle); + else + del_timer(&ax25->idletimer); } void ax25_stop_heartbeat(ax25_cb *ax25)