From: Michael Werner <werner@mrcoffee.engr.sgi.com>

This patch adds support for initializing and addressing multiple AGP
bridges using the agpgart driver.  In particular, it extends agp_acquire
and agp_allocate_memory so that different bridges can be acquired and
memory allocated within a specific AGP aperature.

From: Brice Goglin <Brice.Goglin@ens-lyon.fr>

It seems that memsetting the whole bridge structure to 0 (instead of juste
the agp_in_use field) fixes Benoit's problem too.  No idea which field was
responsible for this.  New patch attached.

From: Mike Werner <werner@sgi.com>

add bridge assignment missed in agp_allocate_memory

From: Andi Kleen <ak@suse.de>

Here's the correct fix. agp_bridge is defined in drivers/char/agp/agp.h.
It's a bit ugly though.
Signed-off-by: Mike Werner <werner@sgi.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Dave Jones <davej@redhat.com>