1 files changed, 7 insertions, 6 deletions

diff --git a/net/ipv6/mcast.c b/net/ipv6/mcast.c
index 6e871afbb2c7..3b114e3fa2f8 100644
--- a/net/ipv6/mcast.c
+++ b/net/ipv6/mcast.c
@@ -28,7 +28,6 @@
  *              - MLDv2 support
  */
 
-#include <linux/config.h>
 #include <linux/module.h>
 #include <linux/errno.h>
 #include <linux/types.h>
@@ -172,7 +171,7 @@ static int ip6_mc_leave_src(struct sock *sk, struct ipv6_mc_socklist *iml,
 
 #define IPV6_MLD_MAX_MSF        64
 
-int sysctl_mld_max_msf = IPV6_MLD_MAX_MSF;
+int sysctl_mld_max_msf __read_mostly = IPV6_MLD_MAX_MSF;
 
 /*
  *      socket join on multicast group
@@ -269,13 +268,14 @@ int ipv6_sock_mc_drop(struct sock *sk, int ifindex, struct in6_addr *addr)
                         if ((dev = dev_get_by_index(mc_lst->ifindex)) != NULL) {
                                 struct inet6_dev *idev = in6_dev_get(dev);
 
+                                (void) ip6_mc_leave_src(sk, mc_lst, idev);
                                 if (idev) {
-                                        (void) ip6_mc_leave_src(sk,mc_lst,idev);
                                         __ipv6_dev_mc_dec(idev, &mc_lst->addr);
                                         in6_dev_put(idev);
                                 }
                                 dev_put(dev);
-                        }
+                        } else
+                                (void) ip6_mc_leave_src(sk, mc_lst, NULL);
                         sock_kfree_s(sk, mc_lst, sizeof(*mc_lst));
                         return 0;
                 }
@@ -335,13 +335,14 @@ void ipv6_sock_mc_close(struct sock *sk)
                 if (dev) {
                         struct inet6_dev *idev = in6_dev_get(dev);
 
+                        (void) ip6_mc_leave_src(sk, mc_lst, idev);
                         if (idev) {
-                                (void) ip6_mc_leave_src(sk, mc_lst, idev);
                                 __ipv6_dev_mc_dec(idev, &mc_lst->addr);
                                 in6_dev_put(idev);
                         }
                         dev_put(dev);
-                }
+                } else
+                        (void) ip6_mc_leave_src(sk, mc_lst, NULL);
 
                 sock_kfree_s(sk, mc_lst, sizeof(*mc_lst));