Commit 46b5ab1a authored Oct 26, 2016 by David Ahern Committed by David S. Miller Oct 29, 2016

net: dev: Fix non-RCU based lower dev walker



netdev_walk_all_lower_dev is not properly walking the lower device
list.  Commit 1a3f060c made netdev_walk_all_lower_dev similar
to netdev_walk_all_upper_dev_rcu and netdev_walk_all_lower_dev_rcu
but failed to update its netdev_next_lower_dev iterator. This patch
fixes that.

Fixes: 1a3f060c ("net: Introduce new api for walking upper and
                     lower devices")
Reported-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David Ahern <dsa@cumulusnetworks.com>
Tested-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

parent b917783c

net/core/dev.c

+2 −2

Original line number	Diff line number	Diff line
		@@ -5400,12 +5400,12 @@ static struct net_device netdev_next_lower_dev(struct net_device dev,
		{
		struct netdev_adjacent *lower;

		lower = list_entry(*iter, struct netdev_adjacent, list);
		lower = list_entry((*iter)->next, struct netdev_adjacent, list);

		if (&lower->list == &dev->adj_list.lower)
		return NULL;

		*iter = lower->list.next;
		*iter = &lower->list;

		return lower->dev;
		}