From 1889b0e7efe8373793069bd3deb7702a51e6f2a5 Mon Sep 17 00:00:00 2001 From: Nicolas Dichtel Date: Mon, 1 Sep 2014 16:07:27 +0200 Subject: [PATCH] rtnl/do_setlink(): set modified when IFLA_LINKMODE is updated The only effect of this patch is to print a warning if IFLA_LINKMODE is updated and a following change fails. Signed-off-by: Nicolas Dichtel Signed-off-by: David S. Miller --- net/core/rtnetlink.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c index 5bbaf74bf457..2bd9fb15b987 100644 --- a/net/core/rtnetlink.c +++ b/net/core/rtnetlink.c @@ -1624,8 +1624,12 @@ static int do_setlink(const struct sk_buff *skb, set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE])); if (tb[IFLA_LINKMODE]) { + unsigned char value = nla_get_u8(tb[IFLA_LINKMODE]); + write_lock_bh(&dev_base_lock); - dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]); + if (dev->link_mode ^ value) + modified = 1; + dev->link_mode = value; write_unlock_bh(&dev_base_lock); } -- 2.20.1