diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index 8e9fad8a3f045..54eed5a8a412b 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -2345,6 +2345,12 @@ static int extent_write_cache_pages(struct address_space *mapping,
 				continue;
 			}
 
+			if (!folio_test_dirty(folio)) {
+				/* Someone wrote it for us. */
+				folio_unlock(folio);
+				continue;
+			}
+
 			if (wbc->sync_mode != WB_SYNC_NONE) {
 				if (folio_test_writeback(folio))
 					submit_write_bio(bio_ctrl, 0);