From: dingtianhong <dingtianhong@huawei.com>
Date: Fri, 13 Dec 2013 02:20:17 +0000 (+0800)
Subject: bonding: remove unwanted lock for bond_option_active_slave_set()
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=4e789fc1a62d4c25726ee053044399d71471fe2f;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git

bonding: remove unwanted lock for bond_option_active_slave_set()

The bond_option_active_slave_set() is always called in RTNL,
the RTNL could protect bond slave list, so remove the unwanted
bond lock.

Suggested-by: Jay Vosburgh <fubar@us.ibm.com>
Suggested-by: Veaceslav Falico <vfalico@redhat.com>
Signed-off-by: Ding Tianhong <dingtianhong@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/drivers/net/bonding/bond_options.c b/drivers/net/bonding/bond_options.c
index dfef673d53d1..600779e5904f 100644
--- a/drivers/net/bonding/bond_options.c
+++ b/drivers/net/bonding/bond_options.c
@@ -107,7 +107,6 @@ int bond_option_active_slave_set(struct bonding *bond,
 	}
 
 	block_netpoll_tx();
-	read_lock(&bond->lock);
 	write_lock_bh(&bond->curr_slave_lock);
 
 	/* check to see if we are clearing active */
@@ -142,7 +141,6 @@ int bond_option_active_slave_set(struct bonding *bond,
 	}
 
 	write_unlock_bh(&bond->curr_slave_lock);
-	read_unlock(&bond->lock);
 	unblock_netpoll_tx();
 	return ret;
 }