[PATCH i-g-t v2] tests/intel/xe_pm_residency: Skip on igt_power_open failure

[Jonathan-Cavitt]

The xe_pm_residency at toggle-gt-c6 test fails when
gt_c6_power >= gt_c0_power.  These values are reported by
igt_power_get_mW, which will always report 0 in the case that
igt_power_open fails to open either the hwmon_fd or rapl.fd.  Since the
expected result will always be a failure in this case, skip the
assertion that gt_c6_power < gt_c0_power.

v2: Do not skip the full test, and instead only ignore the part that is
guaranteed to fail.

Signed-off-by: Jonathan-Cavitt <jonathan.cavitt at intel.com>
Reviewed-by: Kamil Konieczny <kamil.konieczny at linux.intel.com>
CC: Riana Tauro <riana.tauro at intel.com>
---
 tests/intel/xe_pm_residency.c | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/tests/intel/xe_pm_residency.c b/tests/intel/xe_pm_residency.c
index 772fe9b574..0f146bad1c 100644
--- a/tests/intel/xe_pm_residency.c
+++ b/tests/intel/xe_pm_residency.c
@@ -282,10 +282,14 @@ static void measure_power(struct igt_power *gpu, double *power)
 static void toggle_gt_c6(int fd, int n)
 {
 	double gt_c0_power, gt_c6_power;
-	int gt;
+	int gt, ret;
 	struct igt_power gpu;
 
-	igt_power_open(fd, &gpu, "gpu");
+	/*
+	 * igt_power_get_mW will always return 0 if igt_power_open fails,
+	 * so skip the power check in this case.
+	 */
+	ret = igt_power_open(fd, &gpu, "gpu");
 
 	do {
 		fw_handle = igt_debugfs_open(fd, "forcewake_all", O_RDONLY);
@@ -312,7 +316,7 @@ static void toggle_gt_c6(int fd, int n)
 	igt_info("GPU consumed %fmW in GT C6 and %fmW in GT C0\n", gt_c6_power, gt_c0_power);
 
 	/* FIXME: Remove dgfx check after hwmon is added */
-	if (!xe_has_vram(fd))
+	if (!xe_has_vram(fd) && !ret)
 		igt_assert_f(gt_c6_power < gt_c0_power,
 			     "Power consumed in GT C6 should be lower than GT C0\n");
 }
-- 
2.25.1