netdev - Re: [PATCH] fs_enet: Adjust BDs after tx error

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Message-Id: <20100529.001636.42779529.davem@davemloft.net>
Date:	Sat, 29 May 2010 00:16:36 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	mware@...hinstone.net
Cc:	linuxppc-dev@...abs.org, netdev@...r.kernel.org,
	vbordug@...mvista.com, pantelis.antoniou@...il.com
Subject: Re: [PATCH] fs_enet: Adjust BDs after tx error

From: Mark Ware <mware@...hinstone.net>
Date: Thu, 27 May 2010 11:12:12 +1000

> This patch fixes an occasional transmit lockup in the mac-fcc which
> occurs after a tx error.  The test scenario had the local port set
> to autoneg and the other end fixed at 100FD, resulting in a large
> number of late collisions.
> 
> According to the MPC8280RM 30.10.1.3 (also 8272RM 29.10.1.3), after
> a tx error occurs, TBPTR may sometimes point beyond BDs still marked
> as ready.  This patch walks back through the BDs and points TBPTR to
> the earliest one marked as ready.
> 
> Tested on a custom board with a MPC8280.
> 
> Signed-off-by: Mark Ware <mware@...hinstone.net>

Applied, thanks.
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