kernel: Add assert to detect negative timeouts

Add assert when negative (except K_FOREVER) is passed as timeout.
Add negative timeout correction to 0.

Signed-off-by: Krzysztof Chruscinski <[email protected]>

Author: nordic-krch

kernel/sched.c

@@ -368,7 +368,16 @@ static void pend(struct k_thread *thread, _wait_q_t *wait_q, s32_t timeout)
 	}
 
 	if (timeout != K_FOREVER) {
-		s32_t ticks = _TICK_ALIGN + k_ms_to_ticks_ceil32(timeout);
+		s32_t ticks;
+
+		__ASSERT(timeout >= 0,
+			"Only non-negative values are accepted.");
+
+		if (timeout < 0) {
+			timeout = 0;
+		}
+
+		ticks = _TICK_ALIGN + k_ms_to_ticks_ceil32(timeout);
 
 		z_add_thread_timeout(thread, ticks);
 	}