linux-kernel - Re: [PATCH 1/1] TX throttling bug-fixing patch of AX88179

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Date:	Tue, 23 Jul 2013 16:56:53 -0700
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	David Miller <davem@...emloft.net>
Cc:	bhutchings@...arflare.com, oliver@...kum.org, grundler@...gle.com,
	freddy@...x.com.tw, netdev@...r.kernel.org,
	linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
	louis@...x.com.tw, allan@...x.com.tw
Subject: Re: [PATCH 1/1] TX throttling bug-fixing patch of AX88179_178A

On Tue, 2013-07-23 at 16:46 -0700, David Miller wrote:
> From: Eric Dumazet <eric.dumazet@...il.com>
> Date: Mon, 22 Jul 2013 23:10:27 -0700
> 
> > On Mon, 2013-07-22 at 20:47 +0100, Ben Hutchings wrote:
> >> The real solution would be for someone to add SG support to the usbnet
> >> core.  Trying to support 1GbE with only linear skbs is not a great
> >> idea... and it can only be a matter of time before there is USB ultra
> >> speed (or whatever comes after 'super') with 10GbE devices...
> >> 
> > 
> > This sounds a good idea.
> > 
> > Is anybody working on adding SG to usbnet ?
> 
> This is a good long-term plan, but right now we have to do something
> reasonable.
> 
> A quick scan shows that smsc75xx, smsc95xx, and ax88179_178a all have
> this problem.
> 
> Instead of the patch starting this thread, I'd like to see one that
> hits all three drivers and removes all SG and TSO features bits from
> both the ->features _and_ ->hw_features settings.
> 
> Could someone toss that together quickly?

Yes, I can prepare this patch.


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