From: Dai Haruki <dai.haruki@freescale.com>
Date: Tue, 16 Dec 2008 23:34:50 +0000 (-0800)
Subject: gianfar: Make all BD status writes 32-bit
X-Git-Tag: v2.6.29-rc1~581^2~151
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5a5efed4817ef931f648b118aeb9222e53122d2b;p=pandora-kernel.git

gianfar: Make all BD status writes 32-bit

Whenever we want to update the status field in a BD, we usually want to
update the length field, too.  By combining them into one 32-bit field, we
reduce the number of stores to memory shared with the controller, and we
eliminate the need for order-enforcement, as the length and "READY" bit are
now updated atomically at the same time.

Signed-off-by: Dai Haruki <Dai.Haruki@freescale.com>
Signed-off-by: Andy Fleming <afleming@freescale.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

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