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Btrfs: fix wrong mirror number tuning 

Now reading the data from the target device of the replace operation is allowed,
so the mirror number that is greater than the stripes number of a chunk is valid,
we will tune it when we find there is no target device later. Fix it.

Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
This commit is contained in:
Miao Xie 2013-06-19 18:20:17 +08:00 committed by Josef Bacik
parent e6da5d2ec9
commit a70c6172e7
1 changed files with 0 additions and 3 deletions
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3
fs/btrfs/volumes.c
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@ -4420,9 +4420,6 @@ static int __btrfs_map_block(struct btrfs_fs_info *fs_info, int rw,
map = (struct map_lookup *)em->bdev;
offset = logical - em->start;
if (mirror_num > map->num_stripes)
mirror_num = 0;
stripe_len = map->stripe_len;
stripe_nr = offset;
/*