From 60b2a46cd60c54bd6551ddfa01f0aab08ca58a5d Mon Sep 17 00:00:00 2001 From: Randy Vinson Date: Thu, 12 Oct 2006 13:36:23 -0700 Subject: [PATCH] [POWERPC] Fix IO Window Updates on P2P bridges. 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 --- arch/powerpc/kernel/pci_32.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) diff --git a/arch/powerpc/kernel/pci_32.c b/arch/powerpc/kernel/pci_32.c index 9b49f8691d29..0d9ff72e2852 100644 --- a/arch/powerpc/kernel/pci_32.c +++ b/arch/powerpc/kernel/pci_32.c @@ -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); -- 2.20.1