netdev - Re: [PATCH] net: fec: fix the error to get the previous BD entry

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Message-Id: <20130830.175909.1743525148095642605.davem@davemloft.net>
Date:	Fri, 30 Aug 2013 17:59:09 -0400 (EDT)
From:	David Miller <davem@...emloft.net>
To:	B38611@...escale.com
Cc:	b20596@...escale.com, netdev@...r.kernel.org,
	bhutchings@...arflare.com, l.stach@...gutronix.de
Subject: Re: [PATCH] net: fec: fix the error to get the previous BD entry

From: Fugang Duan <B38611@...escale.com>
Date: Fri, 30 Aug 2013 12:35:25 +0800

> When the current BD is the first BD, the previous BD entry
> must be the last BD, not "bdp - 1".
> 
> Add BD entry check to get the previous BD entry correctly.
> 
> Signed-off-by: Fugang Duan  <B38611@...escale.com>

The correct fix is to put this logic into fec_enet_get_prevdesc().
With this current limitation, the function is completely useless.
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