netdev - RE: [PATCH net-next] mlx4_en: dont change mac

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Message-ID: <74A0102445410646AFACC089FD94803A616DC2FE@MTLDAG02.mtl.com>
Date:	Sun, 26 Feb 2012 19:12:12 +0000
From:	Eugenia Emantayev <eugenia@...lanox.com>
To:	"davem@...emloft.net" <davem@...emloft.net>,
	"eric.dumazet@...il.com" <eric.dumazet@...il.com>
CC:	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	Yevgeny Petrilin <yevgenyp@...lanox.com>,
	Eugenia Emantayev <eugenia@...lanox.com>
Subject: RE: [PATCH net-next] mlx4_en: dont change mac_header on xmit

From: Eric Dumazet [mailto:eric.dumazet@...il.com]
Sent: Saturday, February 25, 2012 12:51 PM

> A driver xmit function is not allowed to change skb without special
> care.
>
> mlx4_en_xmit() should not call skb_reset_mac_header() and instead should
> use skb->data to access ethernet header.
>
> This removes a dumb test : if (ethh && ethh->h_dest)
>
> Also remove this slow mlx4_en_mac_to_u64() call, we can use
> get_unaligned() to get faster code.
>
> Signed-off-by: Eric Dumazet <eric.dumazet@...il.com>
> Cc: Yevgeny Petrilin <yevgenyp@...lanox.co.il>
> ---
> Please test this patch before we can commit it, thanks !

Tested and approved, thanks.
--
Eugenia Emantayev

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