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| author | Gary Hade <garyhade@us.ibm.com> | 2007-10-03 22:56:14 (GMT) |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2007-10-12 22:03:18 (GMT) |
| commit | 036fff4cf732c4d69f99a2915924935705744b00 (patch) | |
| tree | 87f6f02e40e8f5c28e6d629e009e6e64a45eec58 /drivers/pci | |
| parent | 8fa5913d54f3b1e09948e6a0db34da887e05ff1f (diff) | |
| download | linux-036fff4cf732c4d69f99a2915924935705744b00.tar.xz | |
PCI: skip ISA ioresource alignment on some systems
Skip ISA ioresource alignment on some systems
To conserve limited PCI i/o resource on some IBM multi-node systems, the
BIOS allocates (via _CRS) and expects the kernel to use addresses in
ranges currently excluded by pcibios_align_resource() [i386/pci/i386.c].
This change allows the kernel to use the currently excluded address
ranges on the IBM x3800, x3850, and x3950.
Signed-off-by: Gary Hade <gary.hade@us.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/pci')
| -rw-r--r-- | drivers/pci/probe.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c index 40e571d..59d6c30 100644 --- a/drivers/pci/probe.c +++ b/drivers/pci/probe.c @@ -544,7 +544,7 @@ int pci_scan_bridge(struct pci_bus *bus, struct pci_dev * dev, int max, int pass goto out; child->primary = buses & 0xFF; child->subordinate = (buses >> 16) & 0xFF; - child->bridge_ctl = bctl; + child->bridge_ctl = bctl ^ PCI_BRIDGE_CTL_NO_ISA; cmax = pci_scan_child_bus(child); if (cmax > max) @@ -597,7 +597,7 @@ int pci_scan_bridge(struct pci_bus *bus, struct pci_dev * dev, int max, int pass pci_write_config_dword(dev, PCI_PRIMARY_BUS, buses); if (!is_cardbus) { - child->bridge_ctl = bctl | PCI_BRIDGE_CTL_NO_ISA; + child->bridge_ctl = bctl ^ PCI_BRIDGE_CTL_NO_ISA; /* * Adjust subordinate busnr in parent buses. * We do this before scanning for children because |