[AX25] ax25_ds_timer: use mod_timer instead of add_timer

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 <jann@gmx.de>
Signed-off-by: Jarek Poplawski <jarkao2@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

2 files changed, 5 insertions, 9 deletions

diff --git a/net/ax25/ax25_dev.c b/net/ax25/ax25_dev.c
index 528c874d9828..a7a0e0c9698b 100644
--- a/net/ax25/ax25_dev.c
+++ b/net/ax25/ax25_dev.c
@@ -82,7 +82,7 @@ void ax25_dev_device_up(struct net_device *dev)
         ax25_dev->values[AX25_VALUES_DS_TIMEOUT]= AX25_DEF_DS_TIMEOUT;
 
 #if defined(CONFIG_AX25_DAMA_SLAVE) || defined(CONFIG_AX25_DAMA_MASTER)
-        init_timer(&ax25_dev->dama.slave_timer);
+        ax25_ds_setup_timer(ax25_dev);
 #endif
 
         spin_lock_bh(&ax25_dev_lock);
diff --git a/net/ax25/ax25_ds_timer.c b/net/ax25/ax25_ds_timer.c
index c4e3b025d21c..2ce79df00680 100644
--- a/net/ax25/ax25_ds_timer.c
+++ b/net/ax25/ax25_ds_timer.c
@@ -40,13 +40,10 @@ static void ax25_ds_timeout(unsigned long);
  *      1/10th of a second.
  */
 
-static void ax25_ds_add_timer(ax25_dev *ax25_dev)
+void ax25_ds_setup_timer(ax25_dev *ax25_dev)
 {
-        struct timer_list *t = &ax25_dev->dama.slave_timer;
-        t->data         = (unsigned long) ax25_dev;
-        t->function     = &ax25_ds_timeout;
-        t->expires      = jiffies + HZ;
-        add_timer(t);
+        setup_timer(&ax25_dev->dama.slave_timer, ax25_ds_timeout,
+                    (unsigned long)ax25_dev);
 }
 
 void ax25_ds_del_timer(ax25_dev *ax25_dev)
@@ -60,10 +57,9 @@ void ax25_ds_set_timer(ax25_dev *ax25_dev)
         if (ax25_dev == NULL)           /* paranoia */
                 return;
 
-        del_timer(&ax25_dev->dama.slave_timer);
         ax25_dev->dama.slave_timeout =
                 msecs_to_jiffies(ax25_dev->values[AX25_VALUES_DS_TIMEOUT]) / 10;
-        ax25_ds_add_timer(ax25_dev);
+        mod_timer(&ax25_dev->dama.slave_timer, jiffies + HZ);
 }
 
 /*