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[82.149.12.148]) by smtp.gmail.com with ESMTPSA id d25-20020aa7d5d9000000b005288f0e547esm7697627eds.55.2023.09.19.10.58.45 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 19 Sep 2023 10:58:46 -0700 (PDT) From: Jernej =?utf-8?B?xaBrcmFiZWM=?= To: Jonathan Cameron , Uwe =?ISO-8859-1?Q?Kleine=2DK=F6nig?= Cc: Lars-Peter Clausen , Chen-Yu Tsai , Samuel Holland , "Rafael J. Wysocki" , Damien Le Moal , Mark Brown , Ido Schimmel , Heiko Stuebner , Daniel Lezcano , Rob Herring , linux-iio@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-sunxi@lists.linux.dev, kernel@pengutronix.de Subject: Re: [PATCH 24/49] iio: adc: sun4i-gpadc-iio: Convert to platform remove callback returning void Date: Tue, 19 Sep 2023 19:58:44 +0200 Message-ID: <2243607.iZASKD2KPV@jernej-laptop> In-Reply-To: <20230919174931.1417681-25-u.kleine-koenig@pengutronix.de> References: <20230919174931.1417681-1-u.kleine-koenig@pengutronix.de> <20230919174931.1417681-25-u.kleine-koenig@pengutronix.de> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="iso-8859-1" Precedence: bulk List-ID: X-Mailing-List: linux-iio@vger.kernel.org Dne torek, 19. september 2023 ob 19:49:06 CEST je Uwe Kleine-K=F6nig napisa= l(a): > 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(). >=20 > Trivially convert this driver from always returning zero in the remove > callback to the void returning variant. >=20 > Signed-off-by: Uwe Kleine-K=F6nig Acked-by: Jernej Skrabec Best regards, Jernej > --- > drivers/iio/adc/sun4i-gpadc-iio.c | 8 +++----- > 1 file changed, 3 insertions(+), 5 deletions(-) >=20 > diff --git a/drivers/iio/adc/sun4i-gpadc-iio.c > b/drivers/iio/adc/sun4i-gpadc-iio.c index 25bba96367a8..100ecced5fc1 1006= 44 > --- a/drivers/iio/adc/sun4i-gpadc-iio.c > +++ b/drivers/iio/adc/sun4i-gpadc-iio.c > @@ -669,7 +669,7 @@ static int sun4i_gpadc_probe(struct platform_device > *pdev) return ret; > } >=20 > -static int sun4i_gpadc_remove(struct platform_device *pdev) > +static void sun4i_gpadc_remove(struct platform_device *pdev) > { > struct iio_dev *indio_dev =3D platform_get_drvdata(pdev); > struct sun4i_gpadc_iio *info =3D iio_priv(indio_dev); > @@ -678,12 +678,10 @@ static int sun4i_gpadc_remove(struct platform_device > *pdev) pm_runtime_disable(&pdev->dev); >=20 > if (!IS_ENABLED(CONFIG_THERMAL_OF)) > - return 0; > + return; >=20 > if (!info->no_irq) > iio_map_array_unregister(indio_dev); > - > - return 0; > } >=20 > static const struct platform_device_id sun4i_gpadc_id[] =3D { > @@ -702,7 +700,7 @@ static struct platform_driver sun4i_gpadc_driver =3D { > }, > .id_table =3D sun4i_gpadc_id, > .probe =3D sun4i_gpadc_probe, > - .remove =3D sun4i_gpadc_remove, > + .remove_new =3D sun4i_gpadc_remove, > }; > MODULE_DEVICE_TABLE(of, sun4i_gpadc_of_id);