diff --git a/fs/dax.c b/fs/dax.c
index 4155a6107fa1..7ab248ed21aa 100644
--- a/fs/dax.c
+++ b/fs/dax.c
@@ -1241,6 +1241,9 @@ dax_iomap_rw(struct kiocb *iocb, struct iov_iter *iter,
 	loff_t done = 0;
 	int ret;
 
+	if (!iomi.len)
+		return 0;
+
 	if (iov_iter_rw(iter) == WRITE) {
 		lockdep_assert_held_write(&iomi.inode->i_rwsem);
 		iomi.flags |= IOMAP_WRITE;