Re: [PATCHv5 2/4] wiegand: add Wiegand bus driver

["Martin Zaťovič" <m.zatovic1@gmail.com>]

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