On Mon, Sep 10, 2012 at 05:19:33PM -0700, Yinghai Lu wrote: > 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 <vl.homutov@xxxxxxxxx> > Tested-by: VL <vl.homutov@xxxxxxxxx> > Signed-off-by: Yinghai Lu <yinghai@xxxxxxxxxx> > Cc: stable@xxxxxxxxxxxxxxx > > 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; > } Adding a unlikely() around the condition may help? RP -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
