[PATCH v5 2/3] generic/413: skip dax to nondax dio test if needed

[Xiong Zhou <xzhou@redhat.com>]

Since not all devices support dax has struct page backend,
which will not support this test.

Signed-off-by: Xiong Zhou <xzhou@redhat.com>
---
 tests/generic/413 | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/tests/generic/413 b/tests/generic/413
index a1cc514..b86c10f 100755
--- a/tests/generic/413
+++ b/tests/generic/413
@@ -88,6 +88,14 @@ t_nondax_to_dax()
 t_dax_to_nondax()
 {
 	prep_files
+	# dax to nondax dio needs struct page backend, which is
+	# not always avaiable among various devices. Skip this
+	# subtest if not compatible.
+	if ! src/t_mmap_dio $SCRATCH_MNT/tf_s \
+	   $TEST_DIR/tf_d $1 "test" > /dev/null 2>&1 ; then
+		return
+	fi
+
 	src/t_mmap_dio $SCRATCH_MNT/tf_s \
 		$TEST_DIR/tf_d $1 "dio dax to nondax"
 
-- 
1.8.3.1