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Btrfs: fix wrong mirror number tuning

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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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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;
/*