tree 6fdb039ab1960d335bb981df75a8839d5421933b
parent fba4b697710eb2a4bee456b9d39e9239c66f8bee
author Liu Bo <bo.li.liu@oracle.com> 1466645509 -0700
committer David Sterba <dsterba@suse.com> 1469533945 +0200

Btrfs: cleanup BUG_ON in merge_bio

One can use btrfs-corrupt-block to hit BUG_ON() in merge_bio(),
thus this aims to stop anyone to panic the whole system by using
 their btrfs.

Since the error in merge_bio can only come from __btrfs_map_block()
when chunk tree mapping has something insane and __btrfs_map_block()
has already had printed the reason, we can just return errors in
merge_bio.

Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>