From ff5cf100110c6ea722d63dfa3d747ceb179e8da4 Mon Sep 17 00:00:00 2001 From: Arkadi Sharshevsky Date: Thu, 8 Jun 2017 08:44:13 +0200 Subject: [PATCH] net: switchdev: Change notifier chain to be atomic In order to use the switchdev notifier chain for FDB sync with the device it has to be changed to atomic. The is done because the bridge can learn new FDBs in atomic context. Signed-off-by: Arkadi Sharshevsky Reviewed-by: Ido Schimmel Reviewed-by: Ivan Vecera Signed-off-by: Jiri Pirko Reviewed-by: Ivan Vecera Signed-off-by: David S. Miller --- net/switchdev/switchdev.c | 30 ++++++------------------------ 1 file changed, 6 insertions(+), 24 deletions(-) diff --git a/net/switchdev/switchdev.c b/net/switchdev/switchdev.c index 8d40a7d31c99..25dc67ef9d37 100644 --- a/net/switchdev/switchdev.c +++ b/net/switchdev/switchdev.c @@ -571,24 +571,17 @@ int switchdev_port_obj_dump(struct net_device *dev, struct switchdev_obj *obj, } EXPORT_SYMBOL_GPL(switchdev_port_obj_dump); -static RAW_NOTIFIER_HEAD(switchdev_notif_chain); +static ATOMIC_NOTIFIER_HEAD(switchdev_notif_chain); /** * register_switchdev_notifier - Register notifier * @nb: notifier_block * - * Register switch device notifier. This should be used by code - * which needs to monitor events happening in particular device. - * Return values are same as for atomic_notifier_chain_register(). + * Register switch device notifier. */ int register_switchdev_notifier(struct notifier_block *nb) { - int err; - - rtnl_lock(); - err = raw_notifier_chain_register(&switchdev_notif_chain, nb); - rtnl_unlock(); - return err; + return atomic_notifier_chain_register(&switchdev_notif_chain, nb); } EXPORT_SYMBOL_GPL(register_switchdev_notifier); @@ -597,16 +590,10 @@ EXPORT_SYMBOL_GPL(register_switchdev_notifier); * @nb: notifier_block * * Unregister switch device notifier. - * Return values are same as for atomic_notifier_chain_unregister(). */ int unregister_switchdev_notifier(struct notifier_block *nb) { - int err; - - rtnl_lock(); - err = raw_notifier_chain_unregister(&switchdev_notif_chain, nb); - rtnl_unlock(); - return err; + return atomic_notifier_chain_unregister(&switchdev_notif_chain, nb); } EXPORT_SYMBOL_GPL(unregister_switchdev_notifier); @@ -616,18 +603,13 @@ EXPORT_SYMBOL_GPL(unregister_switchdev_notifier); * @dev: port device * @info: notifier information data * - * Call all network notifier blocks. This should be called by driver - * when it needs to propagate hardware event. - * Return values are same as for atomic_notifier_call_chain(). - * rtnl_lock must be held. + * Call all network notifier blocks. */ int call_switchdev_notifiers(unsigned long val, struct net_device *dev, struct switchdev_notifier_info *info) { - ASSERT_RTNL(); - info->dev = dev; - return raw_notifier_call_chain(&switchdev_notif_chain, val, info); + return atomic_notifier_call_chain(&switchdev_notif_chain, val, info); } EXPORT_SYMBOL_GPL(call_switchdev_notifiers); -- 2.20.1