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block: return -EBUSY when there are open partitions in blkdev_reread_…
…part 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: 4601b4b ("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>
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