block: fix busy device checking in blk_drop_partitions again
authorChristoph Hellwig <hch@lst.de>
Fri, 10 Apr 2020 12:31:47 +0000 (14:31 +0200)
committerJens Axboe <axboe@kernel.dk>
Fri, 10 Apr 2020 14:34:11 +0000 (08:34 -0600)
commitcb6b771b05c3026a85ed4817c1b87c5e6f41d136
tree03e1d21771f992652483dbed00567badce2204a9
parentd9a9755a83d706fec22e4364b2f91568dfb8c4ea
block: fix busy device checking in blk_drop_partitions again

The previous fix had an off by one in the bd_openers checking, counting
the callers blkdev_get.

Fixes: d3ef5536274f ("block: fix busy device checking in blk_drop_partitions")
Reported-by: Qian Cai <cai@lca.pw>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Tested-by: Qian Cai <cai@lca.pw>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
block/partitions/core.c