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-rw-r--r--fs/iomap.c11
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) &&