btrfs: alloc_chunk: do not refurbish num_bytes

The variable num_bytes is used to store the chunk length of the chunk
that we're allocating. Do not reuse it for something really different in
the same function.

Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: Hans van Kranenburg <hans.van.kranenburg@mendix.com>
Signed-off-by: David Sterba <dsterba@suse.com>

1 files changed, 3 insertions, 4 deletions

diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index bb76263c3ad4..405d8977a2b5 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -4869,10 +4869,9 @@ static int __btrfs_alloc_chunk(struct btrfs_trans_handle *trans,
         if (ret)
                 goto error_del_extent;
 
-        for (i = 0; i < map->num_stripes; i++) {
-                num_bytes = map->stripes[i].dev->bytes_used + stripe_size;
-                btrfs_device_set_bytes_used(map->stripes[i].dev, num_bytes);
-        }
+        for (i = 0; i < map->num_stripes; i++)
+                btrfs_device_set_bytes_used(map->stripes[i].dev,
+                                map->stripes[i].dev->bytes_used + stripe_size);
 
         atomic64_sub(stripe_size * map->num_stripes, &info->free_chunk_space);