[PATCH v2 2/4] tests/amdgpu/amd_abm: Make set_abm_level return type int

[Mario Limonciello <mario.limonciello@xxxxxxx>]

From: Mario Limonciello <superm1@xxxxxxxxxx>

In order to bubble of cases of expeted errors on set_abm_level()
change the return type to int.

Signed-off-by: Mario Limonciello <mario.limonciello@xxxxxxx>
---
 tests/amdgpu/amd_abm.c | 33 +++++++++++++++++++++++----------
 1 file changed, 23 insertions(+), 10 deletions(-)

diff --git a/tests/amdgpu/amd_abm.c b/tests/amdgpu/amd_abm.c
index 2882c2c18..f74c3012c 100644
--- a/tests/amdgpu/amd_abm.c
+++ b/tests/amdgpu/amd_abm.c
@@ -104,10 +104,11 @@ static int backlight_write_brightness(int value)
 	return 0;
 }
 
-static void set_abm_level(data_t *data, igt_output_t *output, int level)
+static int set_abm_level(data_t *data, igt_output_t *output, int level)
 {
 	char buf[PATH_MAX];
 	int fd;
+	int ret;
 
 	igt_assert(snprintf(buf, PATH_MAX, PANEL_POWER_SAVINGS_PATH,
 			    output->name) < PATH_MAX);
@@ -116,8 +117,12 @@ static void set_abm_level(data_t *data, igt_output_t *output, int level)
 
 	igt_assert(fd != -1);
 
-	igt_assert_eq(snprintf(buf, sizeof(buf), "%d", level),
-		      write(fd, buf, 1));
+	snprintf(buf, sizeof(buf), "%d", level);
+	ret = write(fd, buf, 1);
+	if (ret < 0) {
+		close(fd);
+		return ret;
+	}
 
 	igt_assert_eq(close(fd), 0);
 
@@ -129,6 +134,7 @@ static void set_abm_level(data_t *data, igt_output_t *output, int level)
 			 DRM_MODE_DPMS_OFF);
 	kmstest_set_connector_dpms(data->drm_fd, output->config.connector,
 			 DRM_MODE_DPMS_ON);
+	return 0;
 }
 
 static int backlight_read_max_brightness(int *result)
@@ -192,7 +198,8 @@ static void backlight_dpms_cycle(data_t *data)
 		ret = backlight_read_max_brightness(&max_brightness);
 		igt_assert_eq(ret, 0);
 
-		set_abm_level(data, output, 0);
+		ret = set_abm_level(data, output, 0);
+		igt_assert_eq(ret, 0);
 		backlight_write_brightness(max_brightness / 2);
 		usleep(100000);
 		pwm_1 = read_target_backlight_pwm(data->drm_fd, output->name);
@@ -223,7 +230,8 @@ static void backlight_monotonic_basic(data_t *data)
 
 		brightness_step = max_brightness / 10;
 
-		set_abm_level(data, output, 0);
+		ret = set_abm_level(data, output, 0);
+		igt_assert_eq(ret, 0);
 		backlight_write_brightness(max_brightness);
 		usleep(100000);
 		prev_pwm = read_target_backlight_pwm(data->drm_fd, output->name);
@@ -257,7 +265,8 @@ static void backlight_monotonic_abm(data_t *data)
 
 		brightness_step = max_brightness / 10;
 		for (i = 1; i < 5; i++) {
-			set_abm_level(data, output, 0);
+			ret = set_abm_level(data, output, 0);
+			igt_assert_eq(ret, 0);
 			backlight_write_brightness(max_brightness);
 			usleep(100000);
 			prev_pwm = read_target_backlight_pwm(data->drm_fd, output->name);
@@ -289,14 +298,16 @@ static void abm_enabled(data_t *data)
 		ret = backlight_read_max_brightness(&max_brightness);
 		igt_assert_eq(ret, 0);
 
-		set_abm_level(data, output, 0);
+		ret = set_abm_level(data, output, 0);
+		igt_assert_eq(ret, 0);
 		backlight_write_brightness(max_brightness);
 		usleep(100000);
 		prev_pwm = read_target_backlight_pwm(data->drm_fd, output->name);
 		pwm_without_abm = prev_pwm;
 
 		for (i = 1; i < 5; i++) {
-			set_abm_level(data, output, i);
+			ret = set_abm_level(data, output, i);
+			igt_assert_eq(ret, 0);
 			usleep(100000);
 			pwm = read_target_backlight_pwm(data->drm_fd, output->name);
 			igt_assert(pwm <= prev_pwm);
@@ -323,7 +334,8 @@ static void abm_gradual(data_t *data)
 
 		igt_assert_eq(ret, 0);
 
-		set_abm_level(data, output, 0);
+		ret = set_abm_level(data, output, 0);
+		igt_assert_eq(ret, 0);
 		backlight_write_brightness(max_brightness);
 
 		sleep(convergence_delay);
@@ -331,7 +343,8 @@ static void abm_gradual(data_t *data)
 		curr = read_current_backlight_pwm(data->drm_fd, output->name);
 
 		igt_assert_eq(prev_pwm, curr);
-		set_abm_level(data, output, 4);
+		ret = set_abm_level(data, output, 4);
+		igt_assert_eq(ret, 0);
 		for (i = 0; i < 10; i++) {
 			usleep(100000);
 			pwm = read_current_backlight_pwm(data->drm_fd, output->name);
-- 
2.43.0