From patchwork Thu Sep 17 16:57:11 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 1366290 X-Patchwork-Delegate: davem@davemloft.net Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=23.128.96.18; helo=vger.kernel.org; envelope-from=linux-ide-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=lst.de Authentication-Results: ozlabs.org; dkim=pass (2048-bit key; secure) header.d=infradead.org header.i=@infradead.org header.a=rsa-sha256 header.s=casper.20170209 header.b=X6yFktcv; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by ozlabs.org (Postfix) with ESMTP id 4Bsk6v2RJyz9sPB for ; Fri, 18 Sep 2020 03:12:39 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727033AbgIQRLy (ORCPT ); Thu, 17 Sep 2020 13:11:54 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55982 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726952AbgIQRKl (ORCPT ); Thu, 17 Sep 2020 13:10:41 -0400 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id DF3FDC06174A; Thu, 17 Sep 2020 10:10:38 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=Content-Transfer-Encoding:MIME-Version: References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To: Content-Type:Content-ID:Content-Description; bh=mK3IFrmKleYuDfPBu63jJazzBdauHkYdgkU6Y/JSZC8=; b=X6yFktcvg5hw7cyC0dZfNIdN/Z GDJEti+OILxMrNcBRjnmpoB0cgxZwsisX+gZjKVzxA2UUGOmGkItf4rFAbk91SB3zI3mytK0ijef9 FdXWLarqrOn4DvMwEySPQvY7EIoBWJHTd5gwEUC7Ze11XeyFCQQmWDHqXlEfAjaDawuDC/i6lNIZ2 kd5MpEmVfkNsRz3bpgEmrfuivqbfu1ugD0F1EpxdbeEuM8rz7mNMkqWIT5vp3TcO44MXTkr3yYRMN c9eb3cAqbq8uv1SANeDpuOmr3ITZql1w/I2TwuEB4oX9MQUt2fKBBv4vbESO6v6FXz2ZIvWRUyGTG yYANbuyA==; Received: from 089144214092.atnat0023.highway.a1.net ([89.144.214.92] helo=localhost) by casper.infradead.org with esmtpsa (Exim 4.92.3 #3 (Red Hat Linux)) id 1kIxQS-0001AF-5b; Thu, 17 Sep 2020 17:10:28 +0000 From: Christoph Hellwig To: Jens Axboe Cc: Josef Bacik , Minchan Kim , Stefan Haberland , Jan Hoeppner , Joseph Qi , "Rafael J. Wysocki" , Pavel Machek , Len Brown , Andrew Morton , linux-kernel@vger.kernel.org, nbd@other.debian.org, linux-ide@vger.kernel.org, linux-s390@vger.kernel.org, linux-fsdevel@vger.kernel.org, ocfs2-devel@oss.oracle.com, linux-pm@vger.kernel.org, linux-mm@kvack.org, linux-block@vger.kernel.org Subject: [PATCH 05/14] pktcdvd: use blkdev_get_by_dev instead of open coding it Date: Thu, 17 Sep 2020 18:57:11 +0200 Message-Id: <20200917165720.3285256-6-hch@lst.de> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200917165720.3285256-1-hch@lst.de> References: <20200917165720.3285256-1-hch@lst.de> MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by casper.infradead.org. See http://www.infradead.org/rpr.html Precedence: bulk List-ID: X-Mailing-List: linux-ide@vger.kernel.org Replace bdget + blkdev_get by blkdev_get_by_dev. Signed-off-by: Christoph Hellwig --- drivers/block/pktcdvd.c | 25 +++++++++++-------------- 1 file changed, 11 insertions(+), 14 deletions(-) diff --git a/drivers/block/pktcdvd.c b/drivers/block/pktcdvd.c index bc870a5f15f77b..467dbd06b7cdb1 100644 --- a/drivers/block/pktcdvd.c +++ b/drivers/block/pktcdvd.c @@ -2110,16 +2110,18 @@ static int pkt_open_dev(struct pktcdvd_device *pd, fmode_t write) int ret; long lba; struct request_queue *q; + struct block_device *bdev; /* * We need to re-open the cdrom device without O_NONBLOCK to be able * to read/write from/to it. It is already opened in O_NONBLOCK mode - * so bdget() can't fail. + * so open should not fail. */ - bdget(pd->bdev->bd_dev); - ret = blkdev_get(pd->bdev, FMODE_READ | FMODE_EXCL, pd); - if (ret) + bdev = blkdev_get_by_dev(pd->bdev->bd_dev, FMODE_READ | FMODE_EXCL, pd); + if (IS_ERR(bdev)) { + ret = PTR_ERR(bdev); goto out; + } ret = pkt_get_last_written(pd, &lba); if (ret) { @@ -2163,7 +2165,7 @@ static int pkt_open_dev(struct pktcdvd_device *pd, fmode_t write) return 0; out_putdev: - blkdev_put(pd->bdev, FMODE_READ | FMODE_EXCL); + blkdev_put(bdev, FMODE_READ | FMODE_EXCL); out: return ret; } @@ -2500,7 +2502,6 @@ static int pkt_seq_show(struct seq_file *m, void *p) static int pkt_new_dev(struct pktcdvd_device *pd, dev_t dev) { int i; - int ret = 0; char b[BDEVNAME_SIZE]; struct block_device *bdev; @@ -2523,12 +2524,9 @@ static int pkt_new_dev(struct pktcdvd_device *pd, dev_t dev) } } - bdev = bdget(dev); - if (!bdev) - return -ENOMEM; - ret = blkdev_get(bdev, FMODE_READ | FMODE_NDELAY, NULL); - if (ret) - return ret; + bdev = blkdev_get_by_dev(dev, FMODE_READ | FMODE_NDELAY, NULL); + if (IS_ERR(bdev)) + return PTR_ERR(bdev); if (!blk_queue_scsi_passthrough(bdev_get_queue(bdev))) { blkdev_put(bdev, FMODE_READ | FMODE_NDELAY); return -EINVAL; @@ -2546,7 +2544,6 @@ static int pkt_new_dev(struct pktcdvd_device *pd, dev_t dev) pd->cdrw.thread = kthread_run(kcdrwd, pd, "%s", pd->name); if (IS_ERR(pd->cdrw.thread)) { pkt_err(pd, "can't start kernel thread\n"); - ret = -ENOMEM; goto out_mem; } @@ -2558,7 +2555,7 @@ static int pkt_new_dev(struct pktcdvd_device *pd, dev_t dev) blkdev_put(bdev, FMODE_READ | FMODE_NDELAY); /* This is safe: open() is still holding a reference. */ module_put(THIS_MODULE); - return ret; + return -ENOMEM; } static int pkt_ioctl(struct block_device *bdev, fmode_t mode, unsigned int cmd, unsigned long arg)