bonding: properly unset current_arp_slave on slave link up

[ Upstream commit 5a4309746cd74734daa964acb02690c22b3c8911 ]

When a slave comes up, we're unsetting the current_arp_slave without
removing active flags from it, which can lead to situations where we have
more than one slave with active flags in active-backup mode.

To avoid this situation we must remove the active flags from a slave before
removing it as a current_arp_slave.

Signed-off-by: Veaceslav Falico <vfalico@redhat.com>
Signed-off-by: Jay Vosburgh <fubar@us.ibm.com>
Signed-off-by: Andy Gospodarek <andy@greyhouse.net>
Signed-off-by: Marcelo Ricardo Leitner <mleitner@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c
index 0b65c5fccc32243b0b63dee64202c1e1a7074193..e6da842cb288c5f95a3568a19e9403b5ba334601 100644 (file)
--- a/drivers/net/bonding/bond_main.c
+++ b/drivers/net/bonding/bond_main.c
@@ -3076,7 +3076,11 @@ static void bond_ab_arp_commit(struct bonding *bond, int delta_in_ticks)
                                           trans_start + delta_in_ticks)) ||
                            bond->curr_active_slave != slave) {
                                slave->link = BOND_LINK_UP;
-                               bond->current_arp_slave = NULL;
+                               if (bond->current_arp_slave) {
+                                       bond_set_slave_inactive_flags(
+                                               bond->current_arp_slave);
+                                       bond->current_arp_slave = NULL;
+                               }
 
                                pr_info("%s: link status definitely up for interface %s.\n",
                                        bond->dev->name, slave->dev->name);