linux-kernel - Re: [PATCH v2] net: ethernet: pcnet32: Setup the SRAM and NOUFLO on Am79C97{3,5}

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Message-Id: <20150320.131943.186301137261996820.davem@davemloft.net>
Date:	Fri, 20 Mar 2015 13:19:43 -0400 (EDT)
From:	David Miller <davem@...emloft.net>
To:	markos.chandras@...tec.com
Cc:	linux-mips@...ux-mips.org, netdev@...r.kernel.org,
	stable@...r.kernel.org, linux-kernel@...r.kernel.org,
	pcnet32@...ntier.com
Subject: Re: [PATCH v2] net: ethernet: pcnet32: Setup the SRAM and NOUFLO
 on Am79C97{3,5}

From: Markos Chandras <markos.chandras@...tec.com>
Date: Thu, 19 Mar 2015 10:28:14 +0000

> On a MIPS Malta board, tons of fifo underflow errors have been observed
> when using u-boot as bootloader instead of YAMON. The reason for that
> is that YAMON used to set the pcnet device to SRAM mode but u-boot does
> not. As a result, the default Tx threshold (64 bytes) is now too small to
> keep the fifo relatively used and it can result to Tx fifo underflow errors.
> As a result of which, it's best to setup the SRAM on supported controllers
> so we can always use the NOUFLO bit.
> 
> Cc: <netdev@...r.kernel.org>
> Cc: <stable@...r.kernel.org>
> Cc: <linux-kernel@...r.kernel.org>
> Cc: Don Fry <pcnet32@...ntier.com>
> Signed-off-by: Markos Chandras <markos.chandras@...tec.com>

Applied.
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