Re: [PATCH v4] ata/pata_buddha: Probe via modalias instead of initcall

Max Staudt
2019-08-12T14:26:26Z

On 08/12/2019 02:15 PM, Bartlomiej Zolnierkiewicz wrote:
>> What's a good way to do that, given that we now have module_exit()> defined and an exit function is void?
>
> What about something like this:
>
> static bool xsurf_present;
> ...
> static int __init pata_buddha_late_init(void)
> ...
> if (pata_buddha_probe(z, &xsurf_ent) == 0 &&
> xsurf_present == false)
> xsurf_present = true;
> ...
> static void __exit pata_buddha_exit(void)
> ...
> if (xsurf_present)
> return -EBUSY;
> ...
>
> ?

Okay, so we're talking about the same idea. Great!

Unfortunately, pata_buddha_exit() is void, and thus can't fail. According to Documentation/kernel-hacking/hacking.rst this is by design.

Any other ideas? We could also continue to disallow unloading completely until MFD support comes along.

Max