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From:   Michal Suchanek <msuchanek@suse.de>
To:     linux-scsi@vger.kernel.org, linux-block@vger.kernel.org
Cc:     Michal Suchanek <msuchanek@suse.de>,
        Jonathan Corbet <corbet@lwn.net>, Jens Axboe <axboe@kernel.dk>,
        "James E.J. Bottomley" <jejb@linux.ibm.com>,
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        "J. Bruce Fields" <bfields@redhat.com>,
        Mauro Carvalho Chehab <mchehab+samsung@kernel.org>,
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        Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>,
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        linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org,
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        Christoph Hellwig <hch@infradead.org>,
        Matthew Wilcox <willy@infradead.org>
Subject: [PATCH v4 06/10] bdev: reset first_open when looping in __blkget_dev
Date:   Thu, 21 Nov 2019 18:13:13 +0100
Message-Id: <3d315cdc2847db0942168ef3df920acb55b9e5fd.1574355709.git.msuchanek@suse.de>
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It is not clear that no other thread cannot open the block device when
__blkget_dev drops it and loop to restart label. Reset first_open to
false when looping.

Signed-off-by: Michal Suchanek <msuchanek@suse.de>
---
 fs/block_dev.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/fs/block_dev.c b/fs/block_dev.c
index 9c073dbdc1b0..a3083fbada8b 100644
--- a/fs/block_dev.c
+++ b/fs/block_dev.c
@@ -1525,7 +1525,7 @@ static int __blkdev_get(struct block_device *bdev, fmode_t mode, int for_part)
 	int ret;
 	int partno;
 	int perm = 0;
-	bool first_open = false;
+	bool first_open;
 
 	if (mode & FMODE_READ)
 		perm |= MAY_READ;
@@ -1545,6 +1545,7 @@ static int __blkdev_get(struct block_device *bdev, fmode_t mode, int for_part)
  restart:
 
 	ret = -ENXIO;
+	first_open = false;
 	disk = bdev_get_gendisk(bdev, &partno);
 	if (!disk)
 		goto out;
-- 
2.23.0