From fab3fb0ac8c83072465b28ca859c420da6c6511c Mon Sep 17 00:00:00 2001 From: Rajesh Shah Date: Thu, 28 Apr 2005 00:25:45 -0700 Subject: [PATCH] [PATCH] acpi bridge hotadd: Fix pci_enable_device() for p2p bridges When checking if a PCI to PCI bridge should be enabled to decode memory and/or IO resources, we need to look at all device resources not just the first 6. This is needed to allow PCI bridges to pass down memory and IO accesses to child devices even when the bridge itself does not consume resources in its PCI BARs. Signed-off-by: Rajesh Shah Signed-off-by: Andrew Morton Signed-off-by: Greg Kroah-Hartman --- arch/ia64/pci/pci.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) diff --git a/arch/ia64/pci/pci.c b/arch/ia64/pci/pci.c index c0661d3..2a14877 100644 --- a/arch/ia64/pci/pci.c +++ b/arch/ia64/pci/pci.c @@ -418,18 +418,24 @@ pcibios_enable_resources (struct pci_dev *dev, int mask) u16 cmd, old_cmd; int idx; struct resource *r; + unsigned long type_mask = IORESOURCE_IO | IORESOURCE_MEM; if (!dev) return -EINVAL; pci_read_config_word(dev, PCI_COMMAND, &cmd); old_cmd = cmd; - for (idx=0; idx<6; idx++) { + for (idx=0; idxresource[idx]; + if (!(r->flags & type_mask)) + continue; + if ((idx == PCI_ROM_RESOURCE) && + (!(r->flags & IORESOURCE_ROM_ENABLE))) + continue; if (!r->start && r->end) { printk(KERN_ERR "PCI: Device %s not available because of resource collisions\n", @@ -441,8 +447,6 @@ pcibios_enable_resources (struct pci_dev *dev, int mask) if (r->flags & IORESOURCE_MEM) cmd |= PCI_COMMAND_MEMORY; } - if (dev->resource[PCI_ROM_RESOURCE].start) - cmd |= PCI_COMMAND_MEMORY; if (cmd != old_cmd) { printk("PCI: Enabling device %s (%04x -> %04x)\n", pci_name(dev), old_cmd, cmd); pci_write_config_word(dev, PCI_COMMAND, cmd); -- 1.8.2.3