| From | Greg Kroah-Hartman <> | Subject | [PATCH 5.11 11/41] block: return -EBUSY when there are open partitions in blkdev_reread_part | Date | Mon, 26 Apr 2021 09:29:58 +0200 |
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From: Christoph Hellwig <hch@lst.de>
[ Upstream commit 68e6582e8f2dc32fd2458b9926564faa1fb4560e ]
The switch to go through blkdev_get_by_dev means we now ignore the return value from bdev_disk_changed in __blkdev_get. Add a manual check to restore the old semantics.
Fixes: 4601b4b130de ("block: reopen the device in blkdev_reread_part") Reported-by: Karel Zak <kzak@redhat.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Link: https://lore.kernel.org/r/20210421160502.447418-1-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk> Signed-off-by: Sasha Levin <sashal@kernel.org> --- block/ioctl.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/block/ioctl.c b/block/ioctl.c index ff241e663c01..8ba1ed8defd0 100644 --- a/block/ioctl.c +++ b/block/ioctl.c @@ -89,6 +89,8 @@ static int blkdev_reread_part(struct block_device *bdev, fmode_t mode) return -EINVAL; if (!capable(CAP_SYS_ADMIN)) return -EACCES; + if (bdev->bd_part_count) + return -EBUSY; /* * Reopen the device to revalidate the driver state and force a -- 2.30.2
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