diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index ae2c3dc9957e..70b77fe21b9f 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -2594,15 +2594,15 @@ static int pin_down_extent(struct btrfs_trans_handle *trans,
 			   struct btrfs_block_group *cache,
 			   u64 bytenr, u64 num_bytes, int reserved)
 {
+	const u64 reserved_bytes = (reserved ? num_bytes : 0);
+
 	spin_lock(&cache->space_info->lock);
 	spin_lock(&cache->lock);
 	cache->pinned += num_bytes;
-	btrfs_space_info_update_bytes_pinned(cache->space_info, num_bytes);
-	if (reserved) {
-		cache->reserved -= num_bytes;
-		cache->space_info->bytes_reserved -= num_bytes;
-	}
+	cache->reserved -= reserved_bytes;
 	spin_unlock(&cache->lock);
+	cache->space_info->bytes_reserved -= reserved_bytes;
+	btrfs_space_info_update_bytes_pinned(cache->space_info, num_bytes);
 	spin_unlock(&cache->space_info->lock);
 
 	btrfs_set_extent_bit(&trans->transaction->pinned_extents, bytenr,