linux-kernel - Re: [PATCH AUTOSEL 4.19 4/7] Input: amimouse - convert to platform remove callback returning void

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Date: Tue, 9 Jan 2024 22:50:04 +0100
From: Uwe Kleine-König <u.kleine-koenig@...gutronix.de>
To: Pavel Machek <pavel@....cz>
Cc: Sasha Levin <sashal@...nel.org>, linux-kernel@...r.kernel.org, 
	stable@...r.kernel.org, Dmitry Torokhov <dmitry.torokhov@...il.com>, 
	linux-input@...r.kernel.org
Subject: Re: [PATCH AUTOSEL 4.19 4/7] Input: amimouse - convert to platform
 remove callback returning void

On Tue, Jan 09, 2024 at 12:44:55PM +0100, Pavel Machek wrote:
> Hi!
> 
> > From: Uwe Kleine-König <u.kleine-koenig@...gutronix.de>
> > 
> > [ Upstream commit 42b8ff47720258d1f6a4412e780a480c139773a0 ]
> > 
> > The .remove() callback for a platform driver returns an int which makes
> > many driver authors wrongly assume it's possible to do error handling by
> > returning an error code. However the value returned is ignored (apart
> > from emitting a warning) and this typically results in resource leaks.
> > 
> > To improve here there is a quest to make the remove callback return
> > void. In the first step of this quest all drivers are converted to
> > .remove_new(), which already returns void. Eventually after all drivers
> > are converted, .remove_new() will be renamed to .remove().
> > 
> > Trivially convert this driver from always returning zero in the remove
> > callback to the void returning variant.
> 
> We don't really need this for -stable.

Agreed! These patches shouldn't get backported to stable. Even if they
are a dependency (which isn't the case for this patch AFAICT),
backporting of later patches isn't hard even when dropping these
patches.

Best regards
Uwe


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

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