3.16.62-rc1 review patch. If anyone has any objections, please let me know.
------------------ From: Hangbin Liu <liuhang...@gmail.com> commit ff06525fcb8ae3c302ac1319bf6c07c026dea964 upstream. After link down and up, i.e. when call ip_mc_up(), we doesn't init im->unsolicit_count. So after igmp_timer_expire(), we will not start timer again and only send one unsolicit report at last. Fix it by initializing im->unsolicit_count in igmp_group_added(), so we can respect igmp robustness value. Fixes: 24803f38a5c0b ("igmp: do not remove igmp souce list info when set link down") Signed-off-by: Hangbin Liu <liuhang...@gmail.com> Signed-off-by: David S. Miller <da...@davemloft.net> [bwh: Backported to 3.16: - Keep using constant IGMP_Unsolicited_Report_Count - Adjust context] Signed-off-by: Ben Hutchings <b...@decadent.org.uk> --- --- a/net/ipv4/igmp.c +++ b/net/ipv4/igmp.c @@ -1256,6 +1256,8 @@ static void igmp_group_added(struct ip_m if (in_dev->dead) return; + + im->unsolicit_count = IGMP_Unsolicited_Report_Count; if (IGMP_V1_SEEN(in_dev) || IGMP_V2_SEEN(in_dev)) { spin_lock_bh(&im->lock); igmp_start_timer(im, IGMP_Initial_Report_Delay); @@ -1360,7 +1362,6 @@ void ip_mc_inc_group(struct in_device *i spin_lock_init(&im->lock); #ifdef CONFIG_IP_MULTICAST setup_timer(&im->timer, &igmp_timer_expire, (unsigned long)im); - im->unsolicit_count = IGMP_Unsolicited_Report_Count; #endif im->next_rcu = in_dev->mc_list;