netdev - Re: [PATCH net-next] ax88179_178a: avoid copy of tx tcp packets

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Message-ID: <1375365165.10515.143.camel@edumazet-glaptop>
Date:	Thu, 01 Aug 2013 06:52:45 -0700
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Ming Lei <ming.lei@...onical.com>
Cc:	"David S. Miller" <davem@...emloft.net>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Oliver Neukum <oneukum@...e.de>,
	Freddy Xin <freddy@...x.com.tw>,
	Ben Hutchings <bhutchings@...arflare.com>,
	Grant Grundler <grundler@...gle.com>, netdev@...r.kernel.org,
	linux-usb@...r.kernel.org
Subject: Re: [PATCH net-next] ax88179_178a: avoid copy of tx tcp packets

On Thu, 2013-08-01 at 06:49 -0700, Eric Dumazet wrote:
> From: Eric Dumazet <edumazet@...gle.com>
> 
> ax88179_tx_fixup() has quite complex code trying to push 8 bytes
> of control data (len/mss), but fails to do it properly for TCP packets,
> incurring an extra copy and point of memory allocation failure.

I forgot to say this patch is for net-next, but depends on following fix
from net tree being applied.

commit 20f0170377264e8449b6987041f0bcc4d746d3ed
("usbnet: do not pretend to support SG/TSO")



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