netdev - Re: [net-next 38/40] ixgbe: Update feature flags so that LRO and Ntuple are restricted

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Date:	Tue, 07 Jun 2011 15:32:24 -0700
From:	Alexander Duyck <alexander.h.duyck@...el.com>
To:	Ben Hutchings <bhutchings@...arflare.com>
CC:	Jeff Kirsher <jeffrey.t.kirsher@...el.com>, davem@...emloft.net,
	netdev@...r.kernel.org, gospo@...hat.com
Subject: Re: [net-next 38/40] ixgbe: Update feature flags so that LRO and
 Ntuple are restricted

On 06/07/2011 06:15 AM, Ben Hutchings wrote:
> On Tue, 2011-06-07 at 05:33 -0700, Jeff Kirsher wrote:
>> From: Alexander Duyck<alexander.h.duyck@...el.com>
>>
>> This change makes it so that LRO and Ntuple flags are correctly restricted
>> to only devices that support those features.  Currently we weren't
>> enforcing any of those restrictions and as such it was possible to do
>> things such as enable LRO without it actually being supported on the
>> hardware.
>>
>> This change also makes a slight modification to the code that assumes the
>> ETH_FLAG_RXVLAN is the same as the netdev flag. I corrected it by just adding
>> a !! to cast the result of the flag&  to a bool in order to guarantee the two
>> checks are compared as boolean values.
> [...]
>
> You could BUILD_BUG_ON(ETH_FLAG_RXVLAN != NETIF_F_HW_VLAN_RX).
>
> Or implement the new features interface like every other driver...
>
> Ben.

I hadn't looked at what was going on outside of the Intel drivers and 
didn't realize that the get/set_flags calls had been deprecated.

For now I would appreciate it if the existing patch does get accepted, 
but I will see what can be done to move things over to using the new 
features interface.

Thanks,

Alex
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