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[POWERPC] Fix IO Window Updates on P2P bridges.

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When update_bridge_base() updates the IO window on a PCI-to-PCI
bridge, it fails to zero the upper 16 bits of the base and limit
registers if the window size is less than 64K.  This fixes it.

Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Randy Vinson 2006-10-12 13:36:23 -07:00 committed by Paul Mackerras
parent 8ba738c2bb
commit 60b2a46cd6
1 changed files with 6 additions and 6 deletions
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12
arch/powerpc/kernel/pci_32.c
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@ -441,14 +441,14 @@ update_bridge_base(struct pci_bus *bus, int i)
end = res->end - off;
io_base_lo = (start >> 8) & PCI_IO_RANGE_MASK;
io_limit_lo = (end >> 8) & PCI_IO_RANGE_MASK;
if (end > 0xffff) {
pci_write_config_word(dev, PCI_IO_BASE_UPPER16,
start >> 16);
pci_write_config_word(dev, PCI_IO_LIMIT_UPPER16,
end >> 16);
if (end > 0xffff)
io_base_lo |= PCI_IO_RANGE_TYPE_32;
} else
else
io_base_lo |= PCI_IO_RANGE_TYPE_16;
pci_write_config_word(dev, PCI_IO_BASE_UPPER16,
start >> 16);
pci_write_config_word(dev, PCI_IO_LIMIT_UPPER16,
end >> 16);
pci_write_config_byte(dev, PCI_IO_BASE, io_base_lo);
pci_write_config_byte(dev, PCI_IO_LIMIT, io_limit_lo);