On Wed, Jan 20, 2016 at 06:10:03PM +0000, Lorenzo Pieralisi wrote: > To do that, we must claim resources on PCI_PROBE_ONLY systems, but > I know for certain Bjorn does not like the idea (I let you trawl > the archives - at least he does not accept the idea of claiming > resources ONLY on PCI_PROBE_ONLY systems, he thinks we should > always claim resources regardless of that flag and fall-back to > reassigning them in case claiming fails. That's perfectly reasonable, > at least on systems with FW initializing PCI). The problem is dealing > with legacy, so switching to resources claiming by default is a tad > complicated, at least for testing (code is easy to implement). I'd like to think of PCI_PROBE_ONLY basically as "setting IORESOURCE_PCI_FIXED for every BAR", i.e., we can do everything we normally do *except* write to the BAR (of course we have to write to it to size the BAR during enumeration, but we have to restore the original value). I don't think PCI_PROBE_ONLY should have anything to do with the iomem_resource and ioport_resource trees. /proc/iomem and /proc/ioports should still contain every resource we know about, regardless of whether PCI_PROBE_ONLY is set or not. Bjorn -- 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
