netdev - [RESENT PATCH] net: tuntap: Fix tun_net_fix

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Message-Id: <d66c8380b6c50fdcfe2dce344b39bb470a75ba3f.1308595725.git.mirq-linux@rere.qmqm.pl>
Date:	Mon, 20 Jun 2011 21:14:55 +0200 (CEST)
From:	Michał Mirosław <mirq-linux@...e.qmqm.pl>
To:	netdev@...r.kernel.org
Cc:	Herbert Xu <herbert@...dor.apana.org.au>,
	"Michael S. Tsirkin" <mst@...hat.com>,
	Ben Hutchings <bhutchings@...arflare.com>,
	Shan Wei <shanwei@...fujitsu.com>
Subject: [RESENT PATCH] net: tuntap: Fix tun_net_fix_features()

tun->set_features are meant to limit not force the features.

Signed-off-by: Michał Mirosław <mirq-linux@...e.qmqm.pl>
Acked-by: Michael S. Tsirkin <mst@...hat.com>

---
 drivers/net/tun.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/net/tun.c b/drivers/net/tun.c
index 4dab85e..56981c2 100644
--- a/drivers/net/tun.c
+++ b/drivers/net/tun.c
@@ -458,7 +458,7 @@ static u32 tun_net_fix_features(struct net_device *dev, u32 features)
 {
 	struct tun_struct *tun = netdev_priv(dev);
 
-	return (features & tun->set_features) | (features & ~TUN_USER_FEATURES);
+	return features & (tun->set_features | ~TUN_USER_FEATURES);
 }
 
 static const struct net_device_ops tun_netdev_ops = {
-- 
1.7.2.5

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