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

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Message-ID: <CAPnx3XNGBw+SKSFA3DhhHFZZ17f54DMfYjKOcqYTb3N-PWGKpw@mail.gmail.com>
Date:   Thu, 10 Oct 2019 11:19:28 +0800
From:   Candle Sun <candlesea@...il.com>
To:     Jiri Kosina <jikos@...nel.org>
Cc:     Nicolas Saenz Julienne <nsaenzjulienne@...e.de>,
        Benjamin Tissoires <benjamin.tissoires@...hat.com>,
        orson.zhai@...soc.com,
        "open list:HID CORE LAYER" <linux-input@...r.kernel.org>,
        lkml <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 Thu, Oct 10, 2019 at 2:00 AM Jiri Kosina <jikos@...nel.org> wrote:
>
> 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
>

Thanks Nicolas and Jiri,
If macro is not good, I will change it to static function. But the
funciton is only used in hid-core.c,
maybe placing it into hid.h is not good?

Regards,
Candle