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

netdev_walk_all_lower_dev is not properly walking the lower device
list.  Commit 1a3f060c1a 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: 1a3f060c1a ("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>
hifive-unleashed-5.1
David Ahern 2016-10-26 13:21:33 -07:00 committed by David S. Miller
parent b917783c7b
commit 46b5ab1a7c
1 changed files with 2 additions and 2 deletions
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4
net/core/dev.c
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@ -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;
}