[Intel-gfx] [PATCH i-g-t v2] intel_gvtg_test: Handle system(3) return value.

[Tvrtko Ursulin]

From: Tvrtko Ursulin <tvrtko.ursulin at intel.com>

Avoid the build warning by checking the pkill either did not find
any guests or managed to send a signal to all of them.

v2: Inspect system(3) return value properly. (Petri Latvala)

Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin at intel.com>
---
 tools/intel_gvtg_test.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/tools/intel_gvtg_test.c b/tools/intel_gvtg_test.c
index 7a29fbdde7cd..659b7956725c 100644
--- a/tools/intel_gvtg_test.c
+++ b/tools/intel_gvtg_test.c
@@ -144,7 +144,10 @@ static void create_guest(void)
 
 static void destroy_all_guest(void)
 {
-    system("pkill qemu");
+	int ret = system("pkill qemu");
+
+	igt_assert(ret >= 0 && WIFEXITED(ret));
+	igt_assert(WEXITSTATUS(ret) == 0 || WEXITSTATUS(ret) == 1);
 }
 
 static void remove_vgpu(void)
-- 
2.14.1