Re: [PATCH] PCI: remove pcibios_scan_all_fns()

[Avi Kivity]

On 06/22/2009 05:34 PM, Matthew Wilcox wrote:
> > diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
> > index f1ae247..b613cad 100644
> > --- a/drivers/pci/probe.c
> > +++ b/drivers/pci/probe.c
> > @@ -1056,8 +1056,7 @@ int pci_scan_slot(struct pci_bus *bus, int devfn)
> >   	if (dev&&  !dev->is_added)	/* new device? */
> >   		nr++;
> >
> > -	if ((dev&&  dev->multifunction) ||
> > -	    (!dev&&  pcibios_scan_all_fns(bus, devfn))) {
> > +	if (dev&&  dev->multifunction) {
> >   		for (fn = 1; fn<  8; fn++) {
> >   			dev = pci_scan_single_device(bus, devfn + fn);
> >   			if (dev) {
> >      
>
> What a good idea.  I was just looking at making this more complicated
> (due to the ARI capability).
>
> I'd like to know what the KVM / Xen / ... people think about this.
> I don't know if they rely on function 5 being able to show up out of
> the blue.
>
>    

You mean have a function 5 without a function 0?  This doesn't impact 
kvm at all.

Moreover, I see pcibios_scan_all_fns() uniformly defined as 0, so this 
patch doesn't change much, does it?

--
I have a truly marvellous patch that fixes the bug which this
signature is too narrow to contain.

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