Date: Mon, 06 Aug 2001 10:55:05 -0700 From: Mike Smith <msmith@freebsd.org> To: Assem Salama <assem@twcny.rr.com> Cc: freebsd-hackers@freebsd.org Subject: Re: detach Message-ID: <200108061755.f76Ht5i01556@mass.dis.org> In-Reply-To: Your message of "Mon, 06 Aug 2001 12:16:37 EDT." <3B6EC2E5.CF2077FC@twcny.rr.com>
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> Hello,
> I have a question. I'm trying to make a module for a PCI card. My
> problem is my 'detach' function never get's called when I unload the
> module. Al my other functions get called correctly. Here is my source:
Detach != unload.
The detach method is called by your parent to kick you out. If you want
to be notified when your module is unloaded, you need a module event
handler which finds all your instances and detaches them itself.
Use devclass_find_devices() to locate your instances, and then run across
all the detach routines. If any of them return nonzero, you should
refuse to unload.
This is because there isn't a 1:1 correspondence between a loaded module
and a driver instance.
>
> #define DRIVERNAME "ide_mod"
>
> #ifdef DEBUG
> #define PRINTD(STR) uprintf("%s: %s",DRIVERNAME,
> STR);
> #else
> #define PRINTD(STR)
> #endif
>
> static int ide_mod_detach(device_t dev)
> {
> PRINTD("Inside detach ... \n");
> return 0;
> }
>
>
> static device_method_t ide_mod_methods[] =
> {
> /* device methods */
> DEVMETHOD(device_probe, ide_mod_probe),
> DEVMETHOD(device_attach, ide_mod_attach),
> DEVMETHOD(device_detach, ide_mod_detach),
> {0, 0}
> };
>
> static driver_t ide_mod_driver = {
> "ide_mod",
> ide_mod_methods,
> sizeof(ide_mod_softc),
> };
>
> static devclass_t ide_mod_devclas;
>
> /* all our macros */
> DRIVER_MODULE(ide_mod, atapci, ide_mod_driver, ide_mod_devclas, 0, 0);
>
>
> Thanks,
> Assem Salama
>
>
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