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From: Bjorn Helgaas on 3 Feb 2010 18:40

No functional change; this fills in the bus subtractive decode resources
after reading the bridge window information rather than before. Also,
print out the subtractive decode resources as we already do for the
positive decode windows.

Signed-off-by: Bjorn Helgaas <bjorn.helgaas(a)hp.com>
---

drivers/pci/probe.c | 15 ++++++++++-----
1 files changed, 10 insertions(+), 5 deletions(-)


diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index 1d498cd..fbff005 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -391,14 +391,19 @@ void __devinit pci_read_bridge_bases(struct pci_bus *child)
child->secondary, child->subordinate,
dev->transparent ? " (subtractive decode)": "");

- if (dev->transparent) {
- for(i = 3; i < PCI_BUS_NUM_RESOURCES; i++)
- child->resource[i] = child->parent->resource[i - 3];
- }
-
pci_read_bridge_io(child);
pci_read_bridge_mmio(child);
pci_read_bridge_mmio_pref(child);
+
+ if (dev->transparent) {
+ for (i = 3; i < PCI_BUS_NUM_RESOURCES; i++) {
+ child->resource[i] = child->parent->resource[i - 3];
+ if (child->resource[i])
+ dev_printk(KERN_DEBUG, &dev->dev,
+ " bridge window %pR (subtractive decode)\n",
+ child->resource[i]);
+ }
+ }
}

static struct pci_bus * pci_alloc_bus(void)

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