Stephen Hemminger wrote:
quoted text
> On Tue, 27 Apr 2010 15:20:25 -0700
> Dimitris Michailidis <dm@chelsio.com> wrote:
> 
>> Implement the ->set_flags ethtool method to control NETIF_F_RXHASH and
>> set skb->rxhash to the HW calculated hash accordingly.
>>
>> Signed-off-by: Dimitris Michailidis <dm@chelsio.com>
>> ---
>>  drivers/net/cxgb4/cxgb4_main.c |   15 ++++++++++++++-
>>  drivers/net/cxgb4/sge.c        |    7 ++++++-
>>  drivers/net/cxgb4/t4_msg.h     |    1 +
>>  3 files changed, 21 insertions(+), 2 deletions(-)
>>
>> diff --git a/drivers/net/cxgb4/cxgb4_main.c b/drivers/net/cxgb4/cxgb4_main.c
>> index 5f582db..1bad500 100644
>> --- a/drivers/net/cxgb4/cxgb4_main.c
>> +++ b/drivers/net/cxgb4/cxgb4_main.c
>> @@ -1711,6 +1711,18 @@ static int set_tso(struct net_device *dev, u32 value)
>>  	return 0;
>>  }
>>  
>> +static int set_flags(struct net_device *dev, u32 flags)
>> +{
>> +	if (flags & ~ETH_FLAG_RXHASH)
>> +		return -EOPNOTSUPP;
>> +
>> +	if (flags & ETH_FLAG_RXHASH)
>> +		dev->features |= NETIF_F_RXHASH;
>> +	else
>> +		dev->features &= ~NETIF_F_RXHASH;
>> +	return 0;
>> +}
> 
> You need to check for and reject other values NTUPLE and LRO

The first if does that, doesn't it?
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