From patchwork Wed May 5 20:14:49 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Uwe_Kleine-K=C3=B6nig?= X-Patchwork-Id: 12240957 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1BE2AC433B4 for ; Wed, 5 May 2021 20:15:02 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D8406613C3 for ; Wed, 5 May 2021 20:15:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230165AbhEEUP5 (ORCPT ); Wed, 5 May 2021 16:15:57 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59242 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233979AbhEEUP5 (ORCPT ); Wed, 5 May 2021 16:15:57 -0400 Received: from metis.ext.pengutronix.de (metis.ext.pengutronix.de [IPv6:2001:67c:670:201:290:27ff:fe1d:cc33]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5B313C061574 for ; Wed, 5 May 2021 13:15:00 -0700 (PDT) Received: from ptx.hi.pengutronix.de ([2001:67c:670:100:1d::c0]) by metis.ext.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1leNv4-0007fA-5f; Wed, 05 May 2021 22:14:54 +0200 Received: from ukl by ptx.hi.pengutronix.de with local (Exim 4.92) (envelope-from ) id 1leNv2-0006m5-Sc; Wed, 05 May 2021 22:14:52 +0200 From: =?utf-8?q?Uwe_Kleine-K=C3=B6nig?= To: "David S . Miller" , Jens Axboe , Jakub Kicinski , Greg Kroah-Hartman , Jiri Slaby Cc: sparclinux@vger.kernel.org, linux-block@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, kernel@pengutronix.de Subject: [PATCH] sparc/vio: make remove callback return void Date: Wed, 5 May 2021 22:14:49 +0200 Message-Id: <20210505201449.195627-1-u.kleine-koenig@pengutronix.de> X-Mailer: git-send-email 2.30.2 MIME-Version: 1.0 X-SA-Exim-Connect-IP: 2001:67c:670:100:1d::c0 X-SA-Exim-Mail-From: ukl@pengutronix.de X-SA-Exim-Scanned: No (on metis.ext.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-block@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org The driver core ignores the return value of struct bus_type::remove() because there is only little that can be done. To simplify the quest to make this function return void, let struct vio_driver::remove() return void, too. All users already unconditionally return 0, this commit makes it obvious that returning an error code is a bad idea and should prevent that future driver authors consider returning an error code. Note there are two nominally different implementations for a vio bus: one in arch/sparc/kernel/vio.c and the other in arch/powerpc/platforms/pseries/vio.c. This patch only addresses the former. Signed-off-by: Uwe Kleine-König Acked-by: David S. Miller --- arch/sparc/include/asm/vio.h | 2 +- arch/sparc/kernel/ds.c | 6 ------ arch/sparc/kernel/vio.c | 4 ++-- drivers/block/sunvdc.c | 3 +-- drivers/net/ethernet/sun/ldmvsw.c | 4 +--- drivers/net/ethernet/sun/sunvnet.c | 3 +-- drivers/tty/vcc.c | 4 +--- 7 files changed, 7 insertions(+), 19 deletions(-) diff --git a/arch/sparc/include/asm/vio.h b/arch/sparc/include/asm/vio.h index 059f0eb678e0..8a1a83bbb6d5 100644 --- a/arch/sparc/include/asm/vio.h +++ b/arch/sparc/include/asm/vio.h @@ -362,7 +362,7 @@ struct vio_driver { struct list_head node; const struct vio_device_id *id_table; int (*probe)(struct vio_dev *dev, const struct vio_device_id *id); - int (*remove)(struct vio_dev *dev); + void (*remove)(struct vio_dev *dev); void (*shutdown)(struct vio_dev *dev); unsigned long driver_data; struct device_driver driver; diff --git a/arch/sparc/kernel/ds.c b/arch/sparc/kernel/ds.c index 522e5b51050c..4a5bdb0df779 100644 --- a/arch/sparc/kernel/ds.c +++ b/arch/sparc/kernel/ds.c @@ -1236,11 +1236,6 @@ static int ds_probe(struct vio_dev *vdev, const struct vio_device_id *id) return err; } -static int ds_remove(struct vio_dev *vdev) -{ - return 0; -} - static const struct vio_device_id ds_match[] = { { .type = "domain-services-port", @@ -1251,7 +1246,6 @@ static const struct vio_device_id ds_match[] = { static struct vio_driver ds_driver = { .id_table = ds_match, .probe = ds_probe, - .remove = ds_remove, .name = "ds", }; diff --git a/arch/sparc/kernel/vio.c b/arch/sparc/kernel/vio.c index 4f57056ed463..348a88691219 100644 --- a/arch/sparc/kernel/vio.c +++ b/arch/sparc/kernel/vio.c @@ -105,10 +105,10 @@ static int vio_device_remove(struct device *dev) * routines to do so at the moment. TBD */ - return drv->remove(vdev); + drv->remove(vdev); } - return 1; + return 0; } static ssize_t devspec_show(struct device *dev, diff --git a/drivers/block/sunvdc.c b/drivers/block/sunvdc.c index 39aeebc6837d..1547d4345ad8 100644 --- a/drivers/block/sunvdc.c +++ b/drivers/block/sunvdc.c @@ -1071,7 +1071,7 @@ static int vdc_port_probe(struct vio_dev *vdev, const struct vio_device_id *id) return err; } -static int vdc_port_remove(struct vio_dev *vdev) +static void vdc_port_remove(struct vio_dev *vdev) { struct vdc_port *port = dev_get_drvdata(&vdev->dev); @@ -1094,7 +1094,6 @@ static int vdc_port_remove(struct vio_dev *vdev) kfree(port); } - return 0; } static void vdc_requeue_inflight(struct vdc_port *port) diff --git a/drivers/net/ethernet/sun/ldmvsw.c b/drivers/net/ethernet/sun/ldmvsw.c index 01ea0d6f8819..50bd4e3b0af9 100644 --- a/drivers/net/ethernet/sun/ldmvsw.c +++ b/drivers/net/ethernet/sun/ldmvsw.c @@ -404,7 +404,7 @@ static int vsw_port_probe(struct vio_dev *vdev, const struct vio_device_id *id) return err; } -static int vsw_port_remove(struct vio_dev *vdev) +static void vsw_port_remove(struct vio_dev *vdev) { struct vnet_port *port = dev_get_drvdata(&vdev->dev); unsigned long flags; @@ -430,8 +430,6 @@ static int vsw_port_remove(struct vio_dev *vdev) free_netdev(port->dev); } - - return 0; } static void vsw_cleanup(void) diff --git a/drivers/net/ethernet/sun/sunvnet.c b/drivers/net/ethernet/sun/sunvnet.c index 96b883f965f6..58ee89223951 100644 --- a/drivers/net/ethernet/sun/sunvnet.c +++ b/drivers/net/ethernet/sun/sunvnet.c @@ -510,7 +510,7 @@ static int vnet_port_probe(struct vio_dev *vdev, const struct vio_device_id *id) return err; } -static int vnet_port_remove(struct vio_dev *vdev) +static void vnet_port_remove(struct vio_dev *vdev) { struct vnet_port *port = dev_get_drvdata(&vdev->dev); @@ -533,7 +533,6 @@ static int vnet_port_remove(struct vio_dev *vdev) kfree(port); } - return 0; } static const struct vio_device_id vnet_port_match[] = { diff --git a/drivers/tty/vcc.c b/drivers/tty/vcc.c index 0a3a71e14df4..0c9b291ef307 100644 --- a/drivers/tty/vcc.c +++ b/drivers/tty/vcc.c @@ -668,7 +668,7 @@ static int vcc_probe(struct vio_dev *vdev, const struct vio_device_id *id) * * Return: status of removal */ -static int vcc_remove(struct vio_dev *vdev) +static void vcc_remove(struct vio_dev *vdev) { struct vcc_port *port = dev_get_drvdata(&vdev->dev); @@ -703,8 +703,6 @@ static int vcc_remove(struct vio_dev *vdev) kfree(port->domain); kfree(port); } - - return 0; } static const struct vio_device_id vcc_match[] = {