linux-kernel - [PATCH 03/19] block: cleanup del

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Message-Id: <20200830062445.1199128-4-hch@lst.de>
Date:   Sun, 30 Aug 2020 08:24:29 +0200
From:   Christoph Hellwig <hch@....de>
To:     Jens Axboe <axboe@...nel.dk>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Denis Efremov <efremov@...ux.com>,
        "David S. Miller" <davem@...emloft.net>,
        Song Liu <song@...nel.org>, Al Viro <viro@...iv.linux.org.uk>,
        linux-block@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-ide@...r.kernel.org, linux-raid@...r.kernel.org,
        linux-scsi@...r.kernel.org, linux-m68k@...ts.linux-m68k.org
Subject: [PATCH 03/19] block: cleanup del_gendisk a bit

Merge three hidden gendisk checks into one.

Signed-off-by: Christoph Hellwig <hch@....de>
---
 block/genhd.c | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/block/genhd.c b/block/genhd.c
index cb9a51be35b053..df6485223a2c3d 100644
--- a/block/genhd.c
+++ b/block/genhd.c
@@ -973,22 +973,22 @@ void del_gendisk(struct gendisk *disk)
 	disk->flags &= ~GENHD_FL_UP;
 	up_write(&disk->lookup_sem);
 
-	if (!(disk->flags & GENHD_FL_HIDDEN))
+	WARN_ON(!disk->queue);
+
+	if (!(disk->flags & GENHD_FL_HIDDEN)) {
 		sysfs_remove_link(&disk_to_dev(disk)->kobj, "bdi");
-	if (disk->queue) {
+
 		/*
 		 * Unregister bdi before releasing device numbers (as they can
 		 * get reused and we'd get clashes in sysfs).
 		 */
-		if (!(disk->flags & GENHD_FL_HIDDEN))
-			bdi_unregister(disk->queue->backing_dev_info);
+		bdi_unregister(disk->queue->backing_dev_info);
 		blk_unregister_queue(disk);
+		blk_unregister_region(disk_devt(disk), disk->minors);
 	} else {
-		WARN_ON(1);
+		blk_unregister_queue(disk);
 	}
 
-	if (!(disk->flags & GENHD_FL_HIDDEN))
-		blk_unregister_region(disk_devt(disk), disk->minors);
 	/*
 	 * Remove gendisk pointer from idr so that it cannot be looked up
 	 * while RCU period before freeing gendisk is running to prevent
-- 
2.28.0