Intel DP43BF requires "pci=assign-busses" to discover some devices.
It turns out BIOS set the bridge 00:1e.0 bus register wrong.
Try to check that wrong range and reject so next pass could only assign
bus for that bridge.
https://bugzilla.kernel.org/show_bug.cgi?id=18412
Reported-by: VL <[email protected]>
Tested-by: VL <[email protected]>
Signed-off-by: Yinghai Lu <[email protected]>
Cc: [email protected]
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index 3cdba8b..a8f1bf6 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -729,7 +729,8 @@ int __devinit pci_scan_bridge(struct pci_bus *bus, struct
pci_dev *dev, int max,
/* Check if setup is sensible at all */
if (!pass &&
- (primary != bus->number || secondary <= bus->number)) {
+ (primary != bus->number || secondary <= bus->number ||
+ secondary > subordinate)) {
dev_dbg(&dev->dev, "bus configuration invalid,
reconfiguring\n");
broken = 1;
}
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