linux-kernel - Re: [PATCH v2 2/2] siox: Make remove callback return void

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Message-ID: <20201125070627.ragkxfs56czkcrfv@pengutronix.de>
Date:   Wed, 25 Nov 2020 08:06:27 +0100
From:   Uwe Kleine-König <u.kleine-koenig@...gutronix.de>
To:     Thorsten Scherer <thorsten.scherer@...elmann.de>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-kernel@...r.kernel.org,
        Pengutronix Kernel Team <kernel@...gutronix.de>
Subject: Re: [PATCH v2 2/2] siox: Make remove callback return void

On Tue, Nov 24, 2020 at 09:58:45PM +0100, Thorsten Scherer wrote:
> Hello,
> 
> On Tue, Nov 24, 2020 at 03:18:34PM +0100, Uwe Kleine-König wrote:
> > The driver core ignores the return value of the remove callback, so
> > don't give siox drivers the chance to provide a value.
> >
> > All siox drivers only allocate devm-managed resources in
> > .probe, so there is no .remove callback to fix.
> >
> > Signed-off-by: Uwe Kleine-König <u.kleine-koenig@...gutronix.de>
> > ---
> >  drivers/siox/siox-core.c | 5 ++---
> >  include/linux/siox.h     | 2 +-
> >  2 files changed, 3 insertions(+), 4 deletions(-)
> >
> > diff --git a/drivers/siox/siox-core.c b/drivers/siox/siox-core.c
> > index b56cdcb52967..1794ff0106bc 100644
> > --- a/drivers/siox/siox-core.c
> > +++ b/drivers/siox/siox-core.c
> > @@ -525,12 +525,11 @@ static int siox_remove(struct device *dev)
> 
> Shouldn't this return void?

This is the callback used for struct device_driver::remove (and after
patch 2 struct bus_type::remove) which still has to return int. But in
the long run I want to change these to void, too.

Best regards and thanks for your feedback
Uwe

-- 
Pengutronix e.K.                           | Uwe Kleine-König            |
Industrial Linux Solutions                 | https://www.pengutronix.de/ |

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