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Message-ID: <ZOdSudrhg/9u3a9N@fedora>
Date: Thu, 24 Aug 2023 14:53:13 +0200
From: Martin Zaťovič <m.zatovic1@...il.com>
To: Greg KH <gregkh@...uxfoundation.org>
Cc: linux-kernel@...r.kernel.org, robh+dt@...nel.org,
krzysztof.kozlowski+dt@...aro.org, conor+dt@...nel.org,
linus.walleij@...aro.org, quic_jhugo@...cinc.com,
nipun.gupta@....com, tzimmermann@...e.de, ogabbay@...nel.org,
mathieu.poirier@...aro.org, axboe@...nel.dk,
damien.lemoal@...nsource.wdc.com, linux@...y.sk, arnd@...db.de,
yangyicong@...ilicon.com, benjamin.tissoires@...hat.com,
masahiroy@...nel.org, jacek.lawrynowicz@...ux.intel.com,
geert+renesas@...der.be, devicetree@...r.kernel.org,
andriy.shevchenko@...el.com
Subject: Re: [PATCHv5 2/4] wiegand: add Wiegand bus driver
On Thu, Aug 24, 2023 at 01:40:35PM +0200, Greg KH wrote:
> On Thu, Aug 24, 2023 at 01:10:13PM +0200, Martin Zaťovič wrote:
> > +static inline void wiegand_controller_put(void *ptr)
>
> Why is this a void *? It should be "struct wiegand_controller *"
It is a void* because it is being passed to devm_add_action_or_reset()
and this function only accepts a pointer to a function that accepts a void*
parameter. I am not sure if there is a way around it.
>
> Please never use void * if at all possible.
>
> > +static inline void wiegand_unregister_driver(struct wiegand_driver *wdrv)
> > +{
> > + if (wdrv)
>
> How could this ever be true?
>
> > + driver_unregister(&wdrv->driver);
> > +}
> > +
> > +static inline struct wiegand_driver *to_wiegand_driver(struct device_driver *drv)
> > +{
> > + return drv ? container_of(drv, struct wiegand_driver, driver) : NULL;
>
> How could drv be NULL?
>
> And you should make this a const *, right?
Will fix the other issues. Thank you!
>
> thanks,
>
> greg k-h
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