btrfs-progs: fix uninitialized warning in btrfs_calc_stripe_index

chunk-recover.c: In function btrfs_calc_stripe_index
chunk-recover.c:1481: warning: index may be used uninitialized in this function

Signed-off-by: Anand Jain <anand.jain@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.cz>

diff --git a/chunk-recover.c b/chunk-recover.c
index aa38916..677b6c2 100644 (file)
--- a/chunk-recover.c
+++ b/chunk-recover.c
@@ -1491,7 +1491,7 @@ static int btrfs_calc_stripe_index(struct chunk_record *chunk, u64 logical)
                stripe_nr /= nr_data_stripes;
                index = (index + stripe_nr) % chunk->num_stripes;
        } else {
-               BUG_ON(1);
+               return -1;
        }
        return index;
 }
@@ -1554,6 +1554,7 @@ btrfs_rebuild_ordered_meta_chunk_stripes(struct recover_control *rc,
 again:
        er = container_of(cache, struct extent_record, cache);
        index = btrfs_calc_stripe_index(chunk, er->cache.start);
+       BUG_ON(index == -1);
        if (chunk->stripes[index].devid)
                goto next;
        list_for_each_entry_safe(devext, next, &devexts, chunk_list) {
@@ -1944,6 +1945,7 @@ next_csum:
        if (list_is_last(candidates.next, &candidates)) {
                index = btrfs_calc_stripe_index(chunk,
                        key.offset + csum_offset * blocksize);
+               BUG_ON(index == -1);
                if (chunk->stripes[index].devid)
                        goto next_stripe;
                ret = insert_stripe(&candidates, rc, chunk, index);