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atl1: explain 32-bit DMA restriction
authorChris Snook <csnook@redhat.com>
Thu, 20 Sep 2007 19:57:15 +0000 (15:57 -0400)
committerDavid S. Miller <davem@sunset.davemloft.net>
Wed, 10 Oct 2007 23:53:49 +0000 (16:53 -0700)
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>

No differences found
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