From patchwork Fri Mar 17 18:48:10 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Logan Gunthorpe X-Patchwork-Id: 9631323 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id CD16B602D6 for ; Fri, 17 Mar 2017 18:53:47 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id C183C28506 for ; Fri, 17 Mar 2017 18:53:47 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id B621A28522; Fri, 17 Mar 2017 18:53:47 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 2F7FF28506 for ; Fri, 17 Mar 2017 18:53:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751618AbdCQSvA (ORCPT ); Fri, 17 Mar 2017 14:51:00 -0400 Received: from ale.deltatee.com ([207.54.116.67]:56504 "EHLO ale.deltatee.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751174AbdCQSuZ (ORCPT ); Fri, 17 Mar 2017 14:50:25 -0400 Received: from cgy1-donard.priv.deltatee.com ([172.16.1.31]) by ale.deltatee.com with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.84_2) (envelope-from ) id 1cowvs-0002ZA-Se; Fri, 17 Mar 2017 12:49:02 -0600 Received: from gunthorp by cgy1-donard.priv.deltatee.com with local (Exim 4.84_2) (envelope-from ) id 1cowvp-0000pw-7t; Fri, 17 Mar 2017 12:48:57 -0600 From: Logan Gunthorpe To: Greg Kroah-Hartman , Dan Williams , Hans Verkuil , Alexander Viro , Alexandre Belloni , Jason Gunthorpe , Johannes Thumshirn , Dmitry Torokhov , Linus Walleij , Jarkko Sakkinen , "James E.J. Bottomley" , "Martin K. Petersen" , David Woodhouse , Brian Norris , Boris Brezillon , Marek Vasut , Cyrille Pitchen Cc: linux-pci@vger.kernel.org, linux-scsi@vger.kernel.org, rtc-linux@googlegroups.com, linux-mtd@lists.infradead.org, linux-media@vger.kernel.org, linux-iio@vger.kernel.org, linux-rdma@vger.kernel.org, linux-gpio@vger.kernel.org, linux-input@vger.kernel.org, linux-nvdimm@lists.01.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, Logan Gunthorpe Date: Fri, 17 Mar 2017 12:48:10 -0600 Message-Id: <1489776503-3151-4-git-send-email-logang@deltatee.com> X-Mailer: git-send-email 2.1.4 In-Reply-To: <1489776503-3151-1-git-send-email-logang@deltatee.com> References: <1489776503-3151-1-git-send-email-logang@deltatee.com> X-SA-Exim-Connect-IP: 172.16.1.31 X-SA-Exim-Rcpt-To: gregkh@linuxfoundation.org, dan.j.williams@intel.com, hans.verkuil@cisco.com, viro@zeniv.linux.org.uk, jgunthorpe@obsidianresearch.com, jthumshirn@suse.de, linus.walleij@linaro.org, jarkko.sakkinen@linux.intel.com, jejb@linux.vnet.ibm.com, martin.petersen@oracle.com, dwmw2@infradead.org, alexandre.belloni@free-electrons.com, boris.brezillon@free-electrons.com, dmitry.torokhov@gmail.com, computersforpeace@gmail.com, marek.vasut@gmail.com, cyrille.pitchen@atmel.com, rtc-linux@googlegroups.com, linux-mtd@lists.infradead.org, linux-nvdimm@lists.01.org, linux-pci@vger.kernel.org, linux-scsi@vger.kernel.org, linux-media@vger.kernel.org, linux-iio@vger.kernel.org, linux-rdma@vger.kernel.org, linux-gpio@vger.kernel.org, linux-input@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, logang@deltatee.com X-SA-Exim-Mail-From: gunthorp@deltatee.com Subject: [PATCH v5 03/16] device-dax: utilize new cdev_device_add helper function X-SA-Exim-Version: 4.2.1 (built Mon, 26 Dec 2011 16:24:06 +0000) X-SA-Exim-Scanned: Yes (on ale.deltatee.com) Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Replace the open coded registration of the cdev and dev with the new device_add_cdev() helper. The helper replaces a common pattern by taking the proper reference against the parent device and adding both the cdev and the device. Signed-off-by: Logan Gunthorpe Reviewed-by: Dan Williams Reviewed-by: Johannes Thumshirn --- drivers/dax/dax.c | 18 +++++------------- 1 file changed, 5 insertions(+), 13 deletions(-) diff --git a/drivers/dax/dax.c b/drivers/dax/dax.c index a5ed59a..e5f8555 100644 --- a/drivers/dax/dax.c +++ b/drivers/dax/dax.c @@ -677,8 +677,6 @@ static void dax_dev_release(struct device *dev) static void kill_dax_dev(struct dax_dev *dax_dev) { - struct cdev *cdev = &dax_dev->cdev; - /* * Note, rcu is not protecting the liveness of dax_dev, rcu is * ensuring that any fault handlers that might have seen @@ -689,7 +687,6 @@ static void kill_dax_dev(struct dax_dev *dax_dev) dax_dev->alive = false; synchronize_rcu(); unmap_mapping_range(dax_dev->inode->i_mapping, 0, 0, 1); - cdev_del(cdev); } static void unregister_dax_dev(void *dev) @@ -699,7 +696,8 @@ static void unregister_dax_dev(void *dev) dev_dbg(dev, "%s\n", __func__); kill_dax_dev(dax_dev); - device_unregister(dev); + cdev_device_del(&dax_dev->cdev, dev); + put_device(dev); } struct dax_dev *devm_create_dax_dev(struct dax_region *dax_region, @@ -750,18 +748,13 @@ struct dax_dev *devm_create_dax_dev(struct dax_region *dax_region, goto err_inode; } - /* device_initialize() so cdev can reference kobj parent */ + /* from here on we're committed to teardown via dax_dev_release() */ device_initialize(dev); cdev = &dax_dev->cdev; cdev_init(cdev, &dax_fops); cdev->owner = parent->driver->owner; - cdev->kobj.parent = &dev->kobj; - rc = cdev_add(&dax_dev->cdev, dev_t, 1); - if (rc) - goto err_cdev; - /* from here on we're committed to teardown via dax_dev_release() */ dax_dev->num_resources = count; dax_dev->alive = true; dax_dev->region = dax_region; @@ -773,7 +766,8 @@ struct dax_dev *devm_create_dax_dev(struct dax_region *dax_region, dev->groups = dax_attribute_groups; dev->release = dax_dev_release; dev_set_name(dev, "dax%d.%d", dax_region->id, dax_dev->id); - rc = device_add(dev); + + rc = cdev_device_add(cdev, dev); if (rc) { kill_dax_dev(dax_dev); put_device(dev); @@ -786,8 +780,6 @@ struct dax_dev *devm_create_dax_dev(struct dax_region *dax_region, return dax_dev; - err_cdev: - iput(dax_dev->inode); err_inode: ida_simple_remove(&dax_minor_ida, minor); err_minor: