If the child process returns -1, WEXITSTATUS converts to 255 because it
takes only 8 least significant bits. As a result, the test is not
considered failed when it should.

Signed-off-by: Igor Ryzhov <redacted>
---
 app/test/test_kni.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/app/test/test_kni.c b/app/test/test_kni.c
index 0df028696f36..70c81f4af0f4 100644
--- a/app/test/test_kni.c
+++ b/app/test/test_kni.c

@@ -214,7 +214,7 @@ test_kni_link_change(void)
 			p_ret = waitpid(pid, &status, WNOHANG);
 			if (p_ret != 0) {
 				if (WIFEXITED(status))
-					return WEXITSTATUS(status);
+					return WEXITSTATUS(status) ? -1 : 0;
 				return -1;
 			}
 			rte_delay_ms(10);

-- 
2.33.0