Messages in this thread | | | Date | Fri, 10 Jan 2003 02:19:04 +0300 | From | Ivan Kokshaysky <> | Subject | Re: [patch 2.5] 2-pass PCI probing, generic part |
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On Thu, Jan 09, 2003 at 02:16:20PM -0800, Linus Torvalds wrote: > On Fri, 10 Jan 2003, Ivan Kokshaysky wrote: > > > > Note that in most cases PCI-PCI bridges can be safely excluded from > > pci_read_bases() simply because they have neither regular BARs nor > > ROM BAR (even though PCI spec allows that). > > This might be a good approach to take regardless - don't read pci-pci > bridge BAR (or host-bridge BAR's for that matter), simply because > > (a) bridges are more "interesting" than regular devices, and disabling > part of them might be a stupid thing. > (b) we're generally not really interested in the end result anyway
PCI-PCI, PCI-ISA bridges - probably, but not host bridges. On x86 they often have quite a few BARs, like AGP window, AGP MMIO, power management etc., which we cannot ignore.
OTOH, with that patch we can control probing for any given class of devices with a 4-5 lines fixups, per architecture. :-)
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