[PATCH]ipv6: multicast: In mld_send_cr function moving read lock to second for loop

[Guruswamy Basavaiah]

In function mld_send_cr, the first loop is already protected by
idev->mc_lock, it dont need idev->lock read lock, hence moving it
only to second for loop.

Signed-off-by: Guruswamy Basavaiah <guru2...@gmail.com>
---
 net/ipv6/mcast.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/ipv6/mcast.c b/net/ipv6/mcast.c
index d64ee7e..d8e7e15 100644
--- a/net/ipv6/mcast.c
+++ b/net/ipv6/mcast.c
@@ -1860,7 +1860,6 @@ static void mld_send_cr(struct inet6_dev *idev)
     struct sk_buff *skb = NULL;
     int type, dtype;

-    read_lock_bh(&idev->lock);
     spin_lock(&idev->mc_lock);

     /* deleted MCA's */
@@ -1897,6 +1896,7 @@ static void mld_send_cr(struct inet6_dev *idev)
     }
     spin_unlock(&idev->mc_lock);

+    read_lock_bh(&idev->lock);
     /* change recs */
     for (pmc = idev->mc_list; pmc; pmc = pmc->next) {
         spin_lock_bh(&pmc->mca_lock);
-- 
2.9.5