Btrfs: count devices correctly in readahead during RAID 5/6 replace

[linux-2.6-microblaze.git] / fs / btrfs / reada.c

diff --git a/fs/btrfs/reada.c b/fs/btrfs/reada.c
index 0e7beea..4645cd1 100644 (file)
--- a/fs/btrfs/reada.c
+++ b/fs/btrfs/reada.c
@@ -328,6 +328,7 @@ static struct reada_extent *reada_find_extent(struct btrfs_root *root,
        struct btrfs_device *prev_dev;
        u32 blocksize;
        u64 length;
+       int real_stripes;
        int nzones = 0;
        int i;
        unsigned long index = logical >> PAGE_CACHE_SHIFT;
@@ -369,7 +370,8 @@ static struct reada_extent *reada_find_extent(struct btrfs_root *root,
                goto error;
        }
 
-       for (nzones = 0; nzones < bbio->num_stripes; ++nzones) {
+       real_stripes = bbio->num_stripes - bbio->num_tgtdevs;
+       for (nzones = 0; nzones < real_stripes; ++nzones) {
                struct reada_zone *zone;
 
                dev = bbio->stripes[nzones].dev;