1 files changed, 6 insertions, 1 deletions

diff --git a/fs/ocfs2/dir.c b/fs/ocfs2/dir.c
index 67e6866a2a4f..c441ef1f2bad 100644
--- a/fs/ocfs2/dir.c
+++ b/fs/ocfs2/dir.c
@@ -403,7 +403,7 @@ static int ocfs2_extend_dir(struct ocfs2_super *osb,
                             struct buffer_head **new_de_bh)
 {
         int status = 0;
-        int credits, num_free_extents;
+        int credits, num_free_extents, drop_alloc_sem = 0;
         loff_t dir_i_size;
         struct ocfs2_dinode *fe = (struct ocfs2_dinode *) parent_fe_bh->b_data;
         struct ocfs2_alloc_context *data_ac = NULL;
@@ -452,6 +452,9 @@ static int ocfs2_extend_dir(struct ocfs2_super *osb,
                 credits = OCFS2_SIMPLE_DIR_EXTEND_CREDITS;
         }
 
+        down_write(&OCFS2_I(dir)->ip_alloc_sem);
+        drop_alloc_sem = 1;
+
         handle = ocfs2_start_trans(osb, credits);
         if (IS_ERR(handle)) {
                 status = PTR_ERR(handle);
@@ -497,6 +500,8 @@ static int ocfs2_extend_dir(struct ocfs2_super *osb,
         *new_de_bh = new_bh;
         get_bh(*new_de_bh);
 bail:
+        if (drop_alloc_sem)
+                up_write(&OCFS2_I(dir)->ip_alloc_sem);
         if (handle)
                 ocfs2_commit_trans(osb, handle);