netdev - [patch net-next v2 07/15] netpoll: remove usage of dev->master

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Message-Id: <1344956748-2099-8-git-send-email-jiri@resnulli.us>
Date:	Tue, 14 Aug 2012 17:05:40 +0200
From:	Jiri Pirko <jiri@...nulli.us>
To:	netdev@...r.kernel.org
Cc:	davem@...emloft.net, edumazet@...gle.com, faisal.latif@...el.com,
	roland@...nel.org, sean.hefty@...el.com, hal.rosenstock@...il.com,
	fubar@...ibm.com, andy@...yhouse.net, divy@...lsio.com,
	jitendra.kalsaria@...gic.com, sony.chacko@...gic.com,
	linux-driver@...gic.com, kaber@...sh.net, ursula.braun@...ibm.com,
	blaschka@...ux.vnet.ibm.com, linux390@...ibm.com,
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	therbert@...gle.com, xiyou.wangcong@...il.com, joe@...ches.com,
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	linux-rdma@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-s390@...r.kernel.org, bridge@...ts.linux-foundation.org,
	fbl@...hat.com
Subject: [patch net-next v2 07/15] netpoll: remove usage of dev->master

Signed-off-by: Jiri Pirko <jiri@...nulli.us>
---
 net/core/netpoll.c |    8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/net/core/netpoll.c b/net/core/netpoll.c
index b4c90e4..1f457a6 100644
--- a/net/core/netpoll.c
+++ b/net/core/netpoll.c
@@ -207,12 +207,16 @@ static void netpoll_poll_dev(struct net_device *dev)
 
 	if (dev->flags & IFF_SLAVE) {
 		if (dev->npinfo) {
-			struct net_device *bond_dev = dev->master;
+			struct net_device *bond_dev;
 			struct sk_buff *skb;
+
+			rcu_read_lock();
+			bond_dev = netdev_master_upper_dev_get_rcu(dev);
 			while ((skb = skb_dequeue(&dev->npinfo->arp_tx))) {
 				skb->dev = bond_dev;
 				skb_queue_tail(&bond_dev->npinfo->arp_tx, skb);
 			}
+			rcu_read_unlock();
 		}
 	}
 
@@ -795,7 +799,7 @@ int netpoll_setup(struct netpoll *np)
 		return -ENODEV;
 	}
 
-	if (ndev->master) {
+	if (netdev_master_upper_dev_get(ndev)) {
 		np_err(np, "%s is a slave device, aborting\n", np->dev_name);
 		err = -EBUSY;
 		goto put;
-- 
1.7.10.4

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