Re: [Bug 18412] Intel DP43BF requires "pci=assign-busses" to discover some devices

[Yinghai Lu <yinghai@kernel.org>]

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On Fri, Sep 7, 2012 at 3:15 PM, Yinghai Lu <yinghai@kernel.org> wrote:
> On Fri, Sep 7, 2012 at 2:52 PM, Bjorn Helgaas <bhelgaas@google.com> wrote:
>> On Fri, Sep 7, 2012 at 2:40 PM,  <bugzilla-daemon@bugzilla.kernel.org> wrote:
>>> https://bugzilla.kernel.org/show_bug.cgi?id=18412
>>
>>> --- Comment #4 from VL <vl.homutov@gmail.com>  2012-09-07 21:40:04 ---
>>> The bug is still there with behaviour exactly as specified by reporter.
>>>
>>> Tested with linux-3.4.9 (gentoo), DP43BF motherboard and Intel PRO/1000 NICs.
>>> With pci=assign-busses lspci shows devices properly, without it nothing
>>> is in the list.
>
> VL,
>
> I rebased for-pci-busn-alloc branch to current pci-next
>
> please check if could fix the problem.
>
> git://git.kernel.org/pub/scm/linux/kernel/git/yinghai/linux-yinghai.git
> for-pci-busn-alloc
>
> http://git.kernel.org/?p=linux/kernel/git/yinghai/linux-yinghai.git;a=shortlog;h=refs/heads/for-pci-busn-alloc
>

also you could try attached patch

Thanks

Yinghai

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diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index 3cdba8b..0fc2703 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;
 	}