linux-kernel - Re: [PATCH v5] net: ethernet: add driver for Aurora VLSI NB8800 Ethernet controller

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Date:	Tue, 10 Nov 2015 21:21:00 +0000
From:	Måns Rullgård <mans@...sr.com>
To:	David Miller <davem@...emloft.net>
Cc:	eric.dumazet@...il.com, linux-kernel@...r.kernel.org,
	netdev@...r.kernel.org, slash.tmp@...e.fr
Subject: Re: [PATCH v5] net: ethernet: add driver for Aurora VLSI NB8800 Ethernet controller

David Miller <davem@...emloft.net> writes:

> From: Måns Rullgård <mans@...sr.com>
> Date: Tue, 10 Nov 2015 20:53:19 +0000
>
>> David Miller <davem@...emloft.net> writes:
>> 
>>> From: Måns Rullgård <mans@...sr.com>
>>> Date: Tue, 10 Nov 2015 18:05:15 +0000
>>>
>>>> Because I haven't been following the netdev list closely for the last
>>>> five years, and no documentation I read mentioned this function.  I can
>>>> certainly change it.
>>>
>>> It is always advisable to mimick what other drivers do and use them as
>>> a reference, rather than depend upon documentation which by definition
>>> is always going to be out of sync with the source tree.
>> 
>> Sure.  The trick is to pick the right driver(s) to use as reference.
>> Quite a few of them don't use that function.
>
> If you really are stumped on this matter, start at least with the
> ixgbe driver.  In fact pretty much every Intel ethernet driver is
> a reasonable reference.  Others to check out are bnx2x and mlx5.

Even ixgbe uses napi_complete() while netdevice.h says one should
"consider using napi_complete_done() instead."  Did the author consider
it and decide not to, or has the driver simply not been updated?

As for the napi_gro_receive() function, calling that instead of
netif_receive_skb() is easy enough, or are there other things I should
be doing in addition?

-- 
Måns Rullgård
mans@...sr.com
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