Re: RFC: (re-)binding the VFIO platform driver to a platform device

[Scott Wood]

On Wed, 2013-10-02 at 13:37 -0700, gregkh@xxxxxxxxxxxxxxxxxxx wrote:
> On Wed, Oct 02, 2013 at 11:43:30AM -0700, Christoffer Dall wrote:
> > > What's wrong with a non-vfio-specific flag that a driver can set, that
> > > indicates that the driver is willing to try to bind to any device on the
> > > bus if explicitly requested via the existing sysfs bind mechanism?
> > > 
> > It sounds more hackish to me to invent some 'generic' flag to solve a
> > very specific case.  What you're suggesting would let users specify that
> > a serial driver should handle a NIC hardware, no?  That sounds much much
> > worse to me.
> 
> You can do that today, with any PCI driver (or USB driver as well), just
> use the bind/unbind files in sysfs and you had better "know" what you
> are doing...

sysfs bind won't work if it driver_match_device() fails.  PCI has
PCI_ANY_ID, so the missing piece for PCI is a way to say that the driver
should not bind to a device except when explicitly requested via sysfs
bind.

I don't see any equivalent functionality to PCI_ANY_ID for platform
devices.

-Scott



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