From: Christoph Hellwig hch@lst.de
[ Upstream commit cb6b771b05c3026a85ed4817c1b87c5e6f41d136 ]
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 Signed-off-by: Sasha Levin sashal@kernel.org --- block/partition-generic.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/block/partition-generic.c b/block/partition-generic.c index 5f3b2a959aa51..ebe4c2e9834bd 100644 --- a/block/partition-generic.c +++ b/block/partition-generic.c @@ -468,7 +468,7 @@ int blk_drop_partitions(struct gendisk *disk, struct block_device *bdev)
if (!disk_part_scan_enabled(disk)) return 0; - if (bdev->bd_part_count || bdev->bd_openers) + if (bdev->bd_part_count || bdev->bd_openers > 1) return -EBUSY; res = invalidate_partition(disk, 0); if (res)