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authorAlexander Stein <alexander.stein@systec-electronic.com>2012-11-27 08:52:34 +0100
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2013-01-11 09:03:50 -0800
commita0ed2e748abaf7f31e6a2e8129efa461a4181277 (patch)
treef1055fd35b4690c5c6d39f92bfc716d113b8f39d
parentc39096f1ae6551a0d43b84cb5dad309f0d392a38 (diff)
can: Do not call dev_put if restart timer is running upon close
commit ab48b03ec9ae1840a1e427e2375bd0d9d554b4ed upstream. If the restart timer is running due to BUS-OFF and the device is disconnected an dev_put will decrease the usage counter to -1 thus blocking the interface removal, resulting in the following dmesg lines repeating every 10s: can: notifier: receive list not found for dev can0 can: notifier: receive list not found for dev can0 can: notifier: receive list not found for dev can0 unregister_netdevice: waiting for can0 to become free. Usage count = -1 Signed-off-by: Alexander Stein <alexander.stein@systec-electronic.com> Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-rw-r--r--drivers/net/can/dev.c3
1 files changed, 1 insertions, 2 deletions
diff --git a/drivers/net/can/dev.c b/drivers/net/can/dev.c
index d0f8c7e67e7d..cc3ea0d5fd8e 100644
--- a/drivers/net/can/dev.c
+++ b/drivers/net/can/dev.c
@@ -557,8 +557,7 @@ void close_candev(struct net_device *dev)
{
struct can_priv *priv = netdev_priv(dev);
- if (del_timer_sync(&priv->restart_timer))
- dev_put(dev);
+ del_timer_sync(&priv->restart_timer);
can_flush_echo_skb(dev);
}
EXPORT_SYMBOL_GPL(close_candev);