tree 948eb73c7ca53c27736151739d99655e909e5b63
parent 01faccbf866195831af202de59f37e29467a3d74
author Chris Snook <csnook@redhat.com> 1190318235 -0400
committer David S. Miller <davem@sunset.davemloft.net> 1192060429 -0700

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>