Re: [PATCH]PCI:disable resource decode in PCI BAR detection

[Ivan Kokshaysky]

On Thu, Sep 13, 2007 at 02:53:13AM -0700, Greg KH wrote:
> On Thu, Sep 13, 2007 at 01:55:36AM -0600, Matthew Wilcox wrote:
> > Unfortunately if this patch does cause any machine to break, these will
> > be machines that worked fine up until this point, so that would be a
> > regression, which is worse.  Life sucks.
> 
> If, after a while, you think the change should go into the -stable tree,
> I have no objection.

I think it shouldn't - this change will almost certainly cause a regression.
There is a lot of system devices besides the host bridges that shouldn't be
disabled during BAR probe, like interrupt controllers, power management
controllers and so on.

We need a more sophisticated fix - I'm thinking of introducing "probe" field
in struct pci_dev which can be set by "early" quirk routines.

Ivan.
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