From db6d60b07967f6d75d74349b021b262cb8fee628 Mon Sep 17 00:00:00 2001
From: Josh Lloyd <j.nevercast@gmail.com>
Date: Wed, 20 Nov 2019 17:21:35 +1300
Subject: [PATCH] extmod/utime: Always invoke mp_hal_delay_ms when >= to 0ms.

This makes sleep_ms(0) useful as a "yield" so event processing and thread
switching can take place.

Fixes issue #5345.
---
 extmod/utime_mphal.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/extmod/utime_mphal.c b/extmod/utime_mphal.c
index d053cf128b..3d1cdfd820 100644
--- a/extmod/utime_mphal.c
+++ b/extmod/utime_mphal.c
@@ -48,7 +48,7 @@ MP_DEFINE_CONST_FUN_OBJ_1(mp_utime_sleep_obj, time_sleep);
 
 STATIC mp_obj_t time_sleep_ms(mp_obj_t arg) {
     mp_int_t ms = mp_obj_get_int(arg);
-    if (ms > 0) {
+    if (ms >= 0) {
         mp_hal_delay_ms(ms);
     }
     return mp_const_none;