diff --git a/fs/udf/file.c b/fs/udf/file.c
index dca0c3881e82df76352b4254c520b7bcc9ee2928..d567b8448dfca100c9c221488f86a3c3c4268cd7 100644
--- a/fs/udf/file.c
+++ b/fs/udf/file.c
@@ -201,12 +201,10 @@ long udf_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
 static int udf_release_file(struct inode *inode, struct file *filp)
 {
 	if (filp->f_mode & FMODE_WRITE) {
-		mutex_lock(&inode->i_mutex);
 		down_write(&UDF_I(inode)->i_data_sem);
 		udf_discard_prealloc(inode);
 		udf_truncate_tail_extent(inode);
 		up_write(&UDF_I(inode)->i_data_sem);
-		mutex_unlock(&inode->i_mutex);
 	}
 	return 0;
 }