btrfs: reada: Add missed segment checking in reada_find_zone
In rechecking zone-in-tree, we still need to check zone include
our logical address.
Signed-off-by: Zhao Lei <zhaolei@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.com>
diff --git a/fs/btrfs/reada.c b/fs/btrfs/reada.c
index 7448080..7e5d4ac 100644
--- a/fs/btrfs/reada.c
+++ b/fs/btrfs/reada.c
@@ -303,8 +303,10 @@
kfree(zone);
ret = radix_tree_gang_lookup(&dev->reada_zones, (void **)&zone,
logical >> PAGE_CACHE_SHIFT, 1);
- if (ret == 1)
+ if (ret == 1 && logical >= zone->start && logical <= zone->end)
kref_get(&zone->refcnt);
+ else
+ zone = NULL;
}
spin_unlock(&fs_info->reada_lock);