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05 April 2024, 19:05:47 UTC
Revision 954c0b7cd5b9aaa11fb67a0c011fcb5e5897385a authored by Daniel Ritz on 22 August 2006, 14:29:08 UTC, committed by Greg Kroah-Hartman on 26 August 2006, 20:05:31 UTC 
[PATCH] PCI: use PCBIOS as last fallback
 
there was a change in 2.6.17 which affected the order in which the PCI
access methods are probed.  this gives regressions on some machines with
broken BIOS.  the problem is that PCBIOS sometimes reports last bus wrong,
leaving cardbus non-funcational.  previously those system worked fine with
direct access.

The patch changes the PCI init code to have PCBIOS as last fallback, yet
the PCBIOS code still has to run first to set pcibios_last_bus to the value
reported by the BIOS.  this is needed in case legacy PCI probing
(arch/i386/pci/legacy.c) is used to detect peer busses.  using direct
access if available fixes the cardbus problems.

Signed-off-by: Daniel Ritz <daniel.ritz@gmx.ch>
Cc: Dave Hansen <haveblue@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
1 parent faf9b61
History
Tip revision: 954c0b7cd5b9aaa11fb67a0c011fcb5e5897385a authored by Daniel Ritz on 22 August 2006, 14:29:08 UTC
[PATCH] PCI: use PCBIOS as last fallback
Tip revision: 954c0b7
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