From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.kernel.org (mail.kernel.org. [198.145.29.99]) by gmr-mx.google.com with ESMTPS id q7si1881803pgf.3.2021.07.06.03.27.05 for (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Tue, 06 Jul 2021 03:27:05 -0700 (PDT) Date: Tue, 6 Jul 2021 12:26:31 +0200 From: Mauro Carvalho Chehab Subject: Re: [PATCH] bus: Make remove callback return void Message-ID: <20210706122631.463bc671@coco.lan> In-Reply-To: <20210706095037.1425211-1-u.kleine-koenig@pengutronix.de> References: <20210706095037.1425211-1-u.kleine-koenig@pengutronix.de> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable To: Uwe =?UTF-8?B?S2xlaW5lLUvDtm5pZw==?= Cc: Greg Kroah-Hartman , kernel@pengutronix.de, linux-kernel@vger.kernel.org, Russell King , Thomas Bogendoerfer , "James E.J. Bottomley" , Helge Deller , Geoff Levand , Michael Ellerman , Benjamin Herrenschmidt , Paul Mackerras , "Rafael J. Wysocki" , Len Brown , William Breathitt Gray , =?UTF-8?B?UmFmYcWCIE1pxYJlY2tp?= , Maxime Ripard , Chen-Yu Tsai , Jernej Skrabec , Alison Schofield , Vishal Verma , Ira Weiny , Ben Widawsky , Dan Williams , Dave Jiang , Vinod Koul , Stefan Richter , Sudeep Holla , Cristian Marussi , Wu Hao , Tom Rix , Moritz Fischer , Jiri Kosina , Benjamin Tissoires , Srinivas Pandruvada , "K. Y. Srinivasan" , Haiyang Zhang , Stephen Hemminger , Wei Liu , Dexuan Cui , Alexander Shishkin , Wolfram Sang , Alexandre Belloni , Dmitry Torokhov , Samuel Iglesias Gonsalvez , Jens Taprogge , Johannes Thumshirn , Maxim Levitsky , Alex Dubov , Ulf Hansson , Lee Jones , Tomas Winkler , Arnd Bergmann , Jakub Kicinski , "David S. Miller" , Jon Mason , Allen Hubbe , Kishon Vijay Abraham I , Lorenzo Pieralisi , Krzysztof =?UTF-8?B?V2lsY3p5xYRza2k=?= , Bjorn Helgaas , Dominik Brodowski , Maximilian Luz , Hans de Goede , Mark Gross , Matt Porter , Alexandre Bounine , Ohad Ben-Cohen , Bjorn Andersson , Mathieu Poirier , "Martin K. Petersen" , Thorsten Scherer , Srinivas Kandagatla , Andy Gross , Mark Brown , Stephen Boyd , Michael Buesch , Sven Van Asbroeck , Johan Hovold , Alex Elder , Andreas Noever , Michael Jamet , Mika Westerberg , Yehezkel Bernat , Rob Herring , Jiri Slaby , Heikki Krogerus , "Michael S. Tsirkin" , Jason Wang , Kirti Wankhede , Alex Williamson , Cornelia Huck , Martyn Welch , Manohar Vanga , Boris Ostrovsky , Juergen Gross , Stefano Stabellini , Johannes Berg , Jaroslav Kysela , Takashi Iwai , Marc Zyngier , Tyrel Datwyler , Vladimir Zapolskiy , Samuel Holland , Qinglang Miao , Alexey Kardashevskiy , Kai-Heng Feng , Joey Pabalan , Pali =?UTF-8?B?Um9ow6Fy?= , Adrian Hunter , Frank Li , Mike Christie , Bodo Stroesser , Hannes Reinecke , David Woodhouse , SeongJae Park , Julien Grall , linux-arm-kernel@lists.infradead.org, linux-mips@vger.kernel.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-acpi@vger.kernel.org, linux-wireless@vger.kernel.org, linux-sunxi@lists.linux.dev, linux-cxl@vger.kernel.org, nvdimm@lists.linux.dev, dmaengine@vger.kernel.org, linux1394-devel@lists.sourceforge.net, linux-fpga@vger.kernel.org, linux-input@vger.kernel.org, linux-hyperv@vger.kernel.org, linux-i2c@vger.kernel.org, linux-i3c@lists.infradead.org, industrypack-devel@lists.sourceforge.net, linux-media@vger.kernel.org, linux-mmc@vger.kernel.org, netdev@vger.kernel.org, linux-ntb@googlegroups.com, linux-pci@vger.kernel.org, platform-driver-x86@vger.kernel.org, linux-remoteproc@vger.kernel.org, linux-scsi@vger.kernel.org, alsa-devel@alsa-project.org, linux-arm-msm@vger.kernel.org, linux-spi@vger.kernel.org, linux-staging@lists.linux.dev, greybus-dev@lists.linaro.org, target-devel@vger.kernel.org, linux-usb@vger.kernel.org, linux-serial@vger.kernel.org, virtualization@lists.linux-foundation.org, kvm@vger.kernel.org, xen-devel@lists.xenproject.org List-ID: Em Tue, 6 Jul 2021 11:50:37 +0200 Uwe Kleine-K=C3=B6nig escreveu: > The driver core ignores the return value of this callback because there > is only little it can do when a device disappears. >=20 > This is the final bit of a long lasting cleanup quest where several > buses were converted to also return void from their remove callback. > Additionally some resource leaks were fixed that were caused by drivers > returning an error code in the expectation that the driver won't go > away. >=20 > With struct bus_type::remove returning void it's prevented that newly > implemented buses return an ignored error code and so don't anticipate > wrong expectations for driver authors. >=20 > Signed-off-by: Uwe Kleine-K=C3=B6nig > --- > Hello, >=20 > this patch depends on "PCI: endpoint: Make struct pci_epf_driver::remove > return void" that is not yet applied, see > https://lore.kernel.org/r/20210223090757.57604-1-u.kleine-koenig@pengutro= nix.de. >=20 > I tested it using allmodconfig on amd64 and arm, but I wouldn't be > surprised if I still missed to convert a driver. So it would be great to > get this into next early after the merge window closes. >=20 > I send this mail to all people that get_maintainer.pl emits for this > patch. I wonder how many recipents will refuse this mail because of the > long Cc: list :-) >=20 > Best regards > Uwe >=20 > diff --git a/drivers/media/pci/bt8xx/bttv-gpio.c b/drivers/media/pci/bt8x= x/bttv-gpio.c > index b730225ca887..a2b18e2bed1b 100644 > --- a/drivers/media/pci/bt8xx/bttv-gpio.c > +++ b/drivers/media/pci/bt8xx/bttv-gpio.c > @@ -46,14 +46,13 @@ static int bttv_sub_probe(struct device *dev) > return sub->probe ? sub->probe(sdev) : -ENODEV; > } > =20 > -static int bttv_sub_remove(struct device *dev) > +static void bttv_sub_remove(struct device *dev) > { > struct bttv_sub_device *sdev =3D to_bttv_sub_dev(dev); > struct bttv_sub_driver *sub =3D to_bttv_sub_drv(dev->driver); > =20 > if (sub->remove) > sub->remove(sdev); > - return 0; > } > =20 Acked-by: Mauro Carvalho Chehab # for drivers/media Thanks, Mauro