diff --git a/fs/ext4/file.c b/fs/ext4/file.c
index c457c8517f0fd..73a4b711be025 100644
--- a/fs/ext4/file.c
+++ b/fs/ext4/file.c
@@ -476,6 +476,11 @@ static ssize_t ext4_dio_write_checks(struct kiocb *iocb, struct iov_iter *from,
 	 * required to change security info in file_modified(), for extending
 	 * I/O, any form of non-overwrite I/O, and unaligned I/O to unwritten
 	 * extents (as partial block zeroing may be required).
+	 *
+	 * Note that unaligned writes are allowed under shared lock so long as
+	 * they are pure overwrites. Otherwise, concurrent unaligned writes risk
+	 * data corruption due to partial block zeroing in the dio layer, and so
+	 * the I/O must occur exclusively.
 	 */
 	if (*ilock_shared &&
 	    ((!IS_NOSEC(inode) || *extend || !overwrite ||
@@ -492,21 +497,12 @@ static ssize_t ext4_dio_write_checks(struct kiocb *iocb, struct iov_iter *from,
 
 	/*
 	 * Now that locking is settled, determine dio flags and exclusivity
-	 * requirements. Unaligned writes are allowed under shared lock so long
-	 * as they are pure overwrites. Set the iomap overwrite only flag as an
-	 * added precaution in this case. Even though this is unnecessary, we
-	 * can detect and warn on unexpected -EAGAIN if an unsafe unaligned
-	 * write is ever submitted.
-	 *
-	 * Otherwise, concurrent unaligned writes risk data corruption due to
-	 * partial block zeroing in the dio layer, and so the I/O must occur
-	 * exclusively. The inode lock is already held exclusive if the write is
-	 * non-overwrite or extending, so drain all outstanding dio and set the
-	 * force wait dio flag.
+	 * requirements. We don't use DIO_OVERWRITE_ONLY because we enforce
+	 * behavior already. The inode lock is already held exclusive if the
+	 * write is non-overwrite or extending, so drain all outstanding dio and
+	 * set the force wait dio flag.
 	 */
-	if (*ilock_shared && unaligned_io) {
-		*dio_flags = IOMAP_DIO_OVERWRITE_ONLY;
-	} else if (!*ilock_shared && (unaligned_io || *extend)) {
+	if (!*ilock_shared && (unaligned_io || *extend)) {
 		if (iocb->ki_flags & IOCB_NOWAIT) {
 			ret = -EAGAIN;
 			goto out;
@@ -608,7 +604,6 @@ static ssize_t ext4_dio_write_iter(struct kiocb *iocb, struct iov_iter *from)
 		iomap_ops = &ext4_iomap_overwrite_ops;
 	ret = iomap_dio_rw(iocb, from, iomap_ops, &ext4_dio_write_ops,
 			   dio_flags, NULL, 0);
-	WARN_ON_ONCE(ret == -EAGAIN && !(iocb->ki_flags & IOCB_NOWAIT));
 	if (ret == -ENOTBLK)
 		ret = 0;