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block: refactor blk_drop_partitions

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Move the busy check and disk-wide sync into the only caller, so that
the remainder can be shared with del_gendisk.  Also pass the gendisk
instead of the bdev as that is all that is needed.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20210406062303.811835-5-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig
2021-04-06 08:22:55 +02:00
committed by Jens Axboe
parent 473338be3a
commit d3c4a43d92
5 changed files with 10 additions and 26 deletions
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8
fs/block_dev.c
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@@ -1243,9 +1243,11 @@ int bdev_disk_changed(struct block_device *bdev, bool invalidate)
clear_bit(GD_NEED_PART_SCAN, &bdev->bd_disk->state);
rescan:
ret = blk_drop_partitions(bdev);
if (ret)
return ret;
if (bdev->bd_part_count)
return -EBUSY;
sync_blockdev(bdev);
invalidate_bdev(bdev);
blk_drop_partitions(disk);
/*
* Historically we only set the capacity to zero for devices that