diff mbox

net: fix hw_features ethtool_ops->set_flags compatibility

Message ID 20110421231232.BF22613909@rere.qmqm.pl
State Superseded, archived
Delegated to: David Miller
Headers show

Commit Message

Michał Mirosław April 21, 2011, 11:12 p.m. UTC 
Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl>
---
 net/core/ethtool.c |    5 +++--
 1 files changed, 3 insertions(+), 2 deletions(-)
diff mbox

Patch

diff --git a/net/core/ethtool.c b/net/core/ethtool.c
index 13d79f5..a8c5b3e 100644
--- a/net/core/ethtool.c
+++ b/net/core/ethtool.c
@@ -532,7 +532,7 @@  static int ethtool_set_one_feature(struct net_device *dev,
 
 int __ethtool_set_flags(struct net_device *dev, u32 data)
 {
-	u32 changed;
+	u32 changed, forced;
 
 	if (data & ~flags_dup_features)
 		return -EINVAL;
@@ -546,7 +546,8 @@  int __ethtool_set_flags(struct net_device *dev, u32 data)
 	}
 
 	/* allow changing only bits set in hw_features */
-	changed = (data ^ dev->wanted_features) & flags_dup_features;
+	forced = dev->features & flags_dup_features & ~dev->hw_features;
+	changed = data ^ forced ^ dev->wanted_features;
 	if (changed & ~dev->hw_features)
 		return (changed & dev->hw_features) ? -EINVAL : -EOPNOTSUPP;