Device probe issue with an em(4) compatible device

From: Brenden Grace (bcg_at_intelli7.com)
Date: 09/29/04

  • Next message: Steven Hartland: "Re: Device probe issue with an em(4) compatible device" 
    To: freebsd-hackers@freebsd.org
Date: Wed, 29 Sep 2004 12:51:47 -0400

    I have a somewhat limited knowledge of FreeBSD's device system, so
    forgive (and correct) me if I get any of this wrong.

    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?

    Thanks in advance for the clarification/help. 

    -- 
Brenden C. Grace
Intelli7
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