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-rw-r--r--fs/btrfs/ioctl.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index a979ab7d3967..45910d4b8f65 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -1137,12 +1137,16 @@ int btrfs_defrag_file(struct inode *inode, struct file *file,
ra_index += max_cluster;
}
+ mutex_lock(&inode->i_mutex);
ret = cluster_pages_for_defrag(inode, pages, i, cluster);
- if (ret < 0)
+ if (ret < 0) {
+ mutex_unlock(&inode->i_mutex);
goto out_ra;
+ }
defrag_count += ret;
balance_dirty_pages_ratelimited_nr(inode->i_mapping, ret);
+ mutex_unlock(&inode->i_mutex);
if (newer_than) {
if (newer_off == (u64)-1)