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

From: M. Warner Losh (imp_at_bsdimp.com)
Date: 09/30/04

  • Next message: M. Warner Losh: "Re: Device probe issue with an em(4) compatible device" 
    Date: Wed, 29 Sep 2004 18:00:43 -0600 (MDT)
To: bcg@intelli7.com

    In message: <1096476707.2670.1088.camel@localhost.localdomain>
                Brenden Grace <bcg@intelli7.com> writes:
    : 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?

    Ths solution is to have em's probe return a small negative number, and
    your probe return a larger negative number (eg, -10 for the em probe
    and -5 for yours).

    However, is there any reason you're writing a driver for a device
    that's compatible with em? why not use em?

    Warner
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