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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>
This commit is contained in:
Zhao Lei 2015-12-18 21:56:08 +08:00 committed by David Sterba
parent c37f49c7ef
commit 8e9aa51f54
1 changed files with 3 additions and 1 deletions
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4
fs/btrfs/reada.c
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@ -303,8 +303,10 @@ static struct reada_zone *reada_find_zone(struct btrfs_fs_info *fs_info,
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);