block: fix bdev_disk_changed for non-partitioned devices
We still have to set the capacity to 0 if invalidating or call
revalidate_disk if not even if the disk has no partitions. Fix
that by merging rescan_partitions into bdev_disk_changed and just
stubbing out blk_add_partitions and blk_drop_partitions for
non-partitioned devices.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
diff --git a/block/partition-generic.c b/block/partition-generic.c
index 2cbc23f..6148742 100644
--- a/block/partition-generic.c
+++ b/block/partition-generic.c
@@ -445,6 +445,8 @@ int blk_drop_partitions(struct gendisk *disk, struct block_device *bdev)
struct hd_struct *part;
int res;
+ if (!disk_part_scan_enabled(disk))
+ return 0;
if (bdev->bd_part_count || bdev->bd_super)
return -EBUSY;
res = invalidate_partition(disk, 0);
@@ -514,6 +516,9 @@ int blk_add_partitions(struct gendisk *disk, struct block_device *bdev)
struct parsed_partitions *state;
int ret = -EAGAIN, p, highest;
+ if (!disk_part_scan_enabled(disk))
+ return 0;
+
state = check_partition(disk, bdev);
if (!state)
return 0;