[PATCH 2/9] block: cleanup the !zoned case in blk_revalidate_disk_zones

From: Damien Le Moal <damien.lemoal@wdc.com>
To: linux-block@vger.kernel.org, Jens Axboe <axboe@kernel.dk>,
	linux-scsi@vger.kernel.org,
	"Martin K . Petersen" <martin.petersen@oracle.com>,
	dm-devel@redhat.com, Mike Snitzer <snitzer@redhat.com>,
	linux-f2fs-devel@lists.sourceforge.net,
	Jaegeuk Kim <jaegeuk@kernel.org>, Chao Yu <yuchao0@huawei.com>
Subject: [PATCH 2/9] block: cleanup the !zoned case in blk_revalidate_disk_zones
Date: Fri,  8 Nov 2019 10:56:55 +0900	[thread overview]
Message-ID: <20191108015702.233102-3-damien.lemoal@wdc.com> (raw)
In-Reply-To: <20191108015702.233102-1-damien.lemoal@wdc.com>

From: Christoph Hellwig <hch@lst.de>

blk_revalidate_disk_zones is never called for non-zoned devices.  Just
return early and warn instead of trying to handle this case.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com>
---
 block/blk-zoned.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/block/blk-zoned.c b/block/blk-zoned.c
index dae787f67019..523a28d7a15c 100644
--- a/block/blk-zoned.c
+++ b/block/blk-zoned.c
@@ -520,6 +520,9 @@ int blk_revalidate_disk_zones(struct gendisk *disk)
 	sector_t sector = 0;
 	int ret = 0;
 
+	if (WARN_ON_ONCE(!blk_queue_is_zoned(q)))
+		return -EIO;
+
 	/*
 	 * BIO based queues do not use a scheduler so only q->nr_zones
 	 * needs to be updated so that the sysfs exposed value is correct.
@@ -535,10 +538,8 @@ int blk_revalidate_disk_zones(struct gendisk *disk)
 	 */
 	noio_flag = memalloc_noio_save();
 
-	if (!blk_queue_is_zoned(q) || !nr_zones) {
-		nr_zones = 0;
+	if (!nr_zones)
 		goto update;
-	}
 
 	/* Allocate bitmaps */
 	ret = -ENOMEM;
-- 
2.23.0

