From: Chris Snook <csnook@redhat.com>
Date: Thu, 20 Sep 2007 19:57:15 +0000 (-0400)
Subject: atl1: explain 32-bit DMA restriction
X-Git-Tag: v2.6.24-rc1~1454^2~240
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=cdcc520d7b73445c3552a70786afed9a2b22c010;p=pandora-kernel.git

atl1: explain 32-bit DMA restriction

Document the fact that atl1 uses a single shared register for the high 32
bits of 64-bit DMA addresses, making 64-bit DMA more trouble than it's worth.

Signed-off-by: Chris Snook <csnook@redhat.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
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