From: Markos Chandras <markos.chandras@imgtec.com>
Date: Thu, 19 Mar 2015 10:28:14 +0000 (+0000)
Subject: net: ethernet: pcnet32: Setup the SRAM and NOUFLO on Am79C97{3, 5}
X-Git-Tag: omap-for-v4.1/fixes-rc1~278^2~7
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=87f966d97b89774162df04d2106c6350c8fe4cb3;p=pandora-kernel.git

net: ethernet: pcnet32: Setup the SRAM and NOUFLO on Am79C97{3, 5}

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@vger.kernel.org>
Cc: <stable@vger.kernel.org>
Cc: <linux-kernel@vger.kernel.org>
Cc: Don Fry <pcnet32@frontier.com>
Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

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