linux-kernel - Re: [PATCH v2] HID: core: check whether usage page item is after usage id item

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Date:   Wed, 9 Oct 2019 19:59:48 +0200 (CEST)
From:   Jiri Kosina <jikos@...nel.org>
To:     Nicolas Saenz Julienne <nsaenzjulienne@...e.de>
cc:     Candle Sun <candlesea@...il.com>, benjamin.tissoires@...hat.com,
        orson.zhai@...soc.com, linux-input@...r.kernel.org,
        linux-kernel@...r.kernel.org, Candle Sun <candle.sun@...soc.com>,
        Nianfu Bai <nianfu.bai@...soc.com>
Subject: Re: [PATCH v2] HID: core: check whether usage page item is after
 usage id item

On Wed, 9 Oct 2019, Nicolas Saenz Julienne wrote:

> > diff --git a/drivers/hid/hid-core.c b/drivers/hid/hid-core.c
> > index 3eaee2c..3394222 100644
> > --- a/drivers/hid/hid-core.c
> > +++ b/drivers/hid/hid-core.c
> > @@ -35,6 +35,8 @@
> >  
> >  #include "hid-ids.h"
> >  
> > +#define GET_COMPLETE_USAGE(page, id) (((page) << 16) + ((id) & 0xffff))
> 
> Not sure I like the macro. I'd rather have the explicit code. That said, lets
> see what Benjamin has to say.

Not sure about Benjamin :) but I personally would ask for putting it 
somewhere into hid.h as static inline.

And even if it's for some reason insisted on this staying macro, please at 
least put it as close to the place(s) it's being used as possible, in 
order to maintain some code sanity.

Thanks,

-- 
Jiri Kosina
SUSE Labs