Re: Device probe issue with an em(4) compatible device

From: Steven Hartland (killing_at_multiplay.co.uk)
Date: 09/29/04

  • Next message: Brenden Grace: "Re: Device probe issue with an em(4) compatible device" 
    To: "Brenden Grace" <bcg@intelli7.com>, <freebsd-hackers@freebsd.org>
Date: Wed, 29 Sep 2004 18:00:58 +0100

    If its compatible with em why not just alter the em to support
    the additional id's?

        Steve
    ----- Original Message -----
    From: "Brenden Grace" <bcg@intelli7.com>

    > I am writing a network driver for a em(4) compatible chip. I know the
    > specific subvendor id and subdevice id, but the em(4) driver seems to
    > attach to the device before my driver can. Is this because the em_probe
    > is occurring before my probe AND because the em_probe is allowing for
    > PCI_ANY_ID for subvendor subdevice ids (the vendor and device ids of my
    > card are identical to an actual Intel card)? If so the solution then
    > would be to have the em driver return a number less than zero in
    > em_probe and my driver's probe to return a number greater than the
    > em_probes's return?
    >
    > On a side not, would it also not be more correct for FreeBSD drivers in
    > the tree to return a negative number for _any_ device that accepts a
    > PCI_ANY_ID value?

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