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authorDaniel Ritz <daniel.ritz-ml@swissonline.ch>2006-08-22 07:29:08 -0700
committerGreg Kroah-Hartman <gregkh@suse.de>2006-08-26 13:05:31 -0700
commit954c0b7cd5b9aaa11fb67a0c011fcb5e5897385a (patch)
tree09c8eed0e42c3b28d8b0ffc58d86f906f4093658
parentfaf9b616325430422fa13fead88ca7843eb249d6 (diff)
downloadlinux-stericsson-954c0b7cd5b9aaa11fb67a0c011fcb5e5897385a.tar.gz
[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>
-rw-r--r--arch/i386/pci/init.c8
1 files changed, 6 insertions, 2 deletions
diff --git a/arch/i386/pci/init.c b/arch/i386/pci/init.c
index c7650a7e0b07..51087a9d9172 100644
--- a/arch/i386/pci/init.c
+++ b/arch/i386/pci/init.c
@@ -14,8 +14,12 @@ static __init int pci_access_init(void)
#ifdef CONFIG_PCI_BIOS
pci_pcbios_init();
#endif
- if (raw_pci_ops)
- return 0;
+ /*
+ * don't check for raw_pci_ops here because we want pcbios as last
+ * fallback, yet it's needed to run first to set pcibios_last_bus
+ * in case legacy PCI probing is used. otherwise detecting peer busses
+ * fails.
+ */
#ifdef CONFIG_PCI_DIRECT
pci_direct_init();
#endif