[PATCH v2] drm/tests: Split up test cases in igt_check_drm_format_min_pitch

[Maíra Canal]

The igt_check_drm_format_min_pitch() function had a lot of
KUNIT_EXPECT_* calls, all of which ended up allocating and initializing
various test assertion structures on the stack.

This behavior was producing -Wframe-larger-than warnings on PowerPC, i386,
and MIPS architectures, such as:

drivers/gpu/drm/tests/drm_format_test.c: In function 'igt_check_drm_format_min_pitch':
drivers/gpu/drm/tests/drm_format_test.c:271:1: error: the frame size of
3712 bytes is larger than 2048 bytes

So, the igt_check_drm_format_min_pitch() test case was split into three
smaller functions: one testing single plane formats, one testing
multi-planar formats, and the other testing tiled formats.

Fixes: 0421bb0baa84 ("drm: selftest: convert drm_format selftest to KUnit")
Reported-by: kernel test robot <lkp@xxxxxxxxx>
Reported-by: Guenter Roeck <linux@xxxxxxxxxxxx>
Signed-off-by: Maíra Canal <mairacanal@xxxxxxxxxx>
Tested-by: Guenter Roeck <linux@xxxxxxxxxxxx>
Reviewed-by: André Almeida <andrealmeid@xxxxxxxxxx>
---
v1 -> v2:
- Add Guenter's Tested-by tag.
- Add André's Reviewed-by tag.
- Replace "multiple planes" for "multi-planar" (André Almeida).
- Add Fixes tag (Melissa Wen).
---
 drivers/gpu/drm/tests/drm_format_test.c | 16 ++++++++++++++--
 1 file changed, 14 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/tests/drm_format_test.c b/drivers/gpu/drm/tests/drm_format_test.c
index 056cb8599d6d..afb4bca72187 100644
--- a/drivers/gpu/drm/tests/drm_format_test.c
+++ b/drivers/gpu/drm/tests/drm_format_test.c
@@ -91,7 +91,7 @@ static void igt_check_drm_format_block_height(struct kunit *test)
 	KUNIT_EXPECT_FALSE(test, drm_format_info_block_height(info, -1));
 }
 
-static void igt_check_drm_format_min_pitch(struct kunit *test)
+static void igt_check_drm_format_min_pitch_for_single_plane(struct kunit *test)
 {
 	const struct drm_format_info *info = NULL;
 
@@ -175,6 +175,11 @@ static void igt_check_drm_format_min_pitch(struct kunit *test)
 			(uint64_t)UINT_MAX * 4);
 	KUNIT_EXPECT_EQ(test, drm_format_info_min_pitch(info, 0, (UINT_MAX - 1)),
 			(uint64_t)(UINT_MAX - 1) * 4);
+}
+
+static void igt_check_drm_format_min_pitch_for_multi_planar(struct kunit *test)
+{
+	const struct drm_format_info *info = NULL;
 
 	/* Test 2 planes format */
 	info = drm_format_info(DRM_FORMAT_NV12);
@@ -249,6 +254,11 @@ static void igt_check_drm_format_min_pitch(struct kunit *test)
 			(uint64_t)(UINT_MAX - 1) / 2);
 	KUNIT_EXPECT_EQ(test, drm_format_info_min_pitch(info, 2, (UINT_MAX - 1) / 2),
 			(uint64_t)(UINT_MAX - 1) / 2);
+}
+
+static void igt_check_drm_format_min_pitch_for_tiled_format(struct kunit *test)
+{
+	const struct drm_format_info *info = NULL;
 
 	/* Test tiled format */
 	info = drm_format_info(DRM_FORMAT_X0L2);
@@ -273,7 +283,9 @@ static void igt_check_drm_format_min_pitch(struct kunit *test)
 static struct kunit_case drm_format_tests[] = {
 	KUNIT_CASE(igt_check_drm_format_block_width),
 	KUNIT_CASE(igt_check_drm_format_block_height),
-	KUNIT_CASE(igt_check_drm_format_min_pitch),
+	KUNIT_CASE(igt_check_drm_format_min_pitch_for_single_plane),
+	KUNIT_CASE(igt_check_drm_format_min_pitch_for_multi_planar),
+	KUNIT_CASE(igt_check_drm_format_min_pitch_for_tiled_format),
 	{ }
 };
 
-- 
2.37.1