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net: fix ethtool->set_flags not intended -EINVAL return value

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After commit d5dbda2380 "ethtool: Add
support for vlan accleration.", drivers that have NETIF_F_HW_VLAN_TX,
and/or NETIF_F_HW_VLAN_RX feature, but do not allow enable/disable vlan
acceleration via ethtool set_flags, always return -EINVAL from that
function. Fix by returning -EINVAL only if requested features do not
match current settings and can not be changed by driver.

Change any driver that define ethtool->set_flags to use
ethtool_invalid_flags() to avoid similar problems in the future
(also on drivers that do not have the problem).

Tested with modified (to reproduce this bug) myri10ge driver.

Cc: stable@kernel.org # 2.6.37+
Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Stanislaw Gruszka
2011-03-22 23:54:49 +00:00
committed by David S. Miller
parent b5845f9834
commit 673e63c688
7 changed files with 24 additions and 8 deletions
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include/linux/ethtool.h
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@ -680,6 +680,7 @@ int ethtool_op_set_ufo(struct net_device *dev, u32 data);
u32 ethtool_op_get_flags(struct net_device *dev);
int ethtool_op_set_flags(struct net_device *dev, u32 data, u32 supported);
void ethtool_ntuple_flush(struct net_device *dev);
bool ethtool_invalid_flags(struct net_device *dev, u32 data, u32 supported);
/**
* &ethtool_ops - Alter and report network device settings