@@ -805,10 +805,13 @@ int pci_scan_bridge(struct pci_bus *bus, struct pci_dev *dev, int max, int pass)
}
cmax = pci_scan_child_bus(child);
- if (cmax > max)
- max = cmax;
- if (child->busn_res.end > max)
- max = child->busn_res.end;
+ if (cmax > subordinate)
+ dev_warn(&dev->dev,
+ "bridge has subordinate %02x but max busn %02x\n",
+ subordinate, cmax);
+ /* subordinate should equal child->busn_res.end */
+ if (subordinate > max)
+ max = subordinate;
} else {
/*
* We need to assign a number to this bus which we always
pci_scan_child_bus can (potentially) return a bus number higher than the subordinate value of the child bus. Possible reasons are that bus numbers are reserved for SR-IOV or for CardBus (SR-IOV is done without checks and the CardBus checks are sketchy at best). We clamp the returned value to the actual subordinate value and print a warning if too many bus numbers are reserved. Signed-off-by: Andreas Noever <andreas.noever@gmail.com> --- drivers/pci/probe.c | 11 +++++++---- 1 file changed, 7 insertions(+), 4 deletions(-)