linux-kernel - [PATCH 1/7] netpoll: use GFP_ATOMIC in slave_enable_netpoll() and __netpoll

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Date:	Fri, 27 Jul 2012 23:37:58 +0800
From:	Cong Wang <amwang@...hat.com>
To:	netdev@...r.kernel.org
Cc:	Cong Wang <amwang@...hat.com>,
	"David S. Miller" <davem@...emloft.net>,
	Jay Vosburgh <fubar@...ibm.com>,
	Andy Gospodarek <andy@...yhouse.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Cong Wang <xiyou.wangcong@...il.com>,
	Joe Perches <joe@...ches.com>,
	Neil Horman <nhorman@...driver.com>,
	linux-kernel@...r.kernel.org
Subject: [PATCH 1/7] netpoll: use GFP_ATOMIC in slave_enable_netpoll() and __netpoll_setup()

slave_enable_netpoll() and __netpoll_setup() may be called
with read_lock() held, so should use GFP_ATOMIC to allocate
memory.

Cc: "David S. Miller" <davem@...emloft.net>
Reported-by: Dan Carpenter <dan.carpenter@...cle.com>
Signed-off-by: Cong Wang <amwang@...hat.com>
---
 drivers/net/bonding/bond_main.c |    2 +-
 net/core/netpoll.c              |    2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c
index 6fae5f3..ab773d4 100644
--- a/drivers/net/bonding/bond_main.c
+++ b/drivers/net/bonding/bond_main.c
@@ -1235,7 +1235,7 @@ static inline int slave_enable_netpoll(struct slave *slave)
 	struct netpoll *np;
 	int err = 0;
 
-	np = kzalloc(sizeof(*np), GFP_KERNEL);
+	np = kzalloc(sizeof(*np), GFP_ATOMIC);
 	err = -ENOMEM;
 	if (!np)
 		goto out;
diff --git a/net/core/netpoll.c b/net/core/netpoll.c
index b4c90e4..c78a966 100644
--- a/net/core/netpoll.c
+++ b/net/core/netpoll.c
@@ -734,7 +734,7 @@ int __netpoll_setup(struct netpoll *np, struct net_device *ndev)
 	}
 
 	if (!ndev->npinfo) {
-		npinfo = kmalloc(sizeof(*npinfo), GFP_KERNEL);
+		npinfo = kmalloc(sizeof(*npinfo), GFP_ATOMIC);
 		if (!npinfo) {
 			err = -ENOMEM;
 			goto out;
-- 
1.7.7.6

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