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Re: [PATCH] pcictl: simplify its usage

On Thu, Jun 04, 2009 at 01:02:53PM -0400, der Mouse wrote:
> > Yes.  I'm not sure you need a new /dev/pci.  /dev/pci* can already
> > handle requests for all PCI busses [...]
> But you need /dev/pci in order to have something to open when you don't
> have a bus number available.  (There is nothing that compels busses to
> be numbered starting 0, and, if pci0 is explicitly configured but not
> found, it won't exist.  Or are /dev/pci* openable even if the
> corresponding bus was not actually configured?)

No, you're right. But that would be a very strange kernel config file;
PCI busses are numbered starting from 0, increasing each time autoconf
finds a new bus. Of course you could iterate over the /dev/pci* until you
find one that works.
OK, we could have a /dev/pci that can always be openned. My point was that
the existing API is fine, it justs needs to be extended to get a
PCI_IOC_BUSINFO-like that works for an arbitrary bus number.

Manuel Bouyer <>
     NetBSD: 26 ans d'experience feront toujours la difference

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