From: Nguyen Hong Ky <nh-ky@jinso.co.jp>
Date: Mon, 7 Oct 2013 06:29:25 +0000 (+0900)
Subject: net: sh_eth: Fix RX packets errors on R8A7740
X-Git-Tag: v3.12-rc7~20^2~57
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=2c6221e4a5aab417cb18bef6f1130d1374240258;p=pandora-kernel.git

net: sh_eth: Fix RX packets errors on R8A7740

This patch will fix RX packets errors when receiving big size
of data by set bit RNC = 1.

RNC - Receive Enable Control

0: Upon completion of reception of one frame, the E-DMAC writes
the receive status to the descriptor and clears the RR bit in
EDRRR to 0.

1: Upon completion of reception of one frame, the E-DMAC writes
(writes back) the receive status to the descriptor. In addition,
the E-DMAC reads the next descriptor and prepares for reception
of the next frame.

In addition, for get more stable when receiving packets, I set
maximum size for the transmit/receive FIFO and inserts padding
in receive data.

Signed-off-by: Nguyen Hong Ky <nh-ky@jinso.co.jp>
Signed-off-by: David S. Miller <davem@davemloft.net>
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