1 files changed, 6 insertions, 5 deletions

diff --git a/fs/iomap.c b/fs/iomap.c
index 64ce240217a1..72f3864a2e6b 100644
--- a/fs/iomap.c
+++ b/fs/iomap.c
@@ -1596,12 +1596,13 @@ iomap_dio_bio_actor(struct inode *inode, loff_t pos, loff_t length,
 
         if (iomap->flags & IOMAP_F_NEW) {
                 need_zeroout = true;
-        } else {
+        } else if (iomap->type == IOMAP_MAPPED) {
                 /*
-                 * Use a FUA write if we need datasync semantics, this
-                 * is a pure data IO that doesn't require any metadata
-                 * updates and the underlying device supports FUA. This
-                 * allows us to avoid cache flushes on IO completion.
+                 * Use a FUA write if we need datasync semantics, this is a pure
+                 * data IO that doesn't require any metadata updates (including
+                 * after IO completion such as unwritten extent conversion) and
+                 * the underlying device supports FUA. This allows us to avoid
+                 * cache flushes on IO completion.
                  */
                 if (!(iomap->flags & (IOMAP_F_SHARED|IOMAP_F_DIRTY)) &&
                     (dio->flags & IOMAP_DIO_WRITE_FUA) &&