[PATCH] Fixup for DEC 21154 bridge to allow CardBus support

Hello!

I'm using Blue&While G3.  I installed a CardBus bridge into a PCI slot.
The bridge uses TI PCI1410 chip.  16-bit PCMCIA cards work fine, but
CardBus cards don't work.  They are not shown by lspci.  I'm running
Debian unstable with Linux 2.6.6-bk9.

It turns out the PCI bridge (DEC 21154) only handles bus 1 and doesn't
forward requests to higher buses.  The CardBus card is configured to act
as a bridge from bus 1 to buses 2-5.  That's why requests to bus 2 don't
go through.

If I reconfigure the PCI bridge to handle buses 1-255, the CardBus cards
start working.  The attached patch add a fixup for DEC 21154 bridge.

If there are a better way to fix the problem with CardBus, I'm ready to
test other patches.

More information about the system (including kernel log) is available at
http://www.red-bean.com/~proski/g3bw/

As a side not, the kernel says that the Host bridge (Motorola MPC106
Grackle) is configured to support buses 0 and 1.  Those values come from
the "bus-range" property.  I believe this limitation is not enforced, or
it would also hinder CardBus support.

--
Regards,
Pavel Roskin