From 33f550cb65c950068ff04c331daeeda3547d2e50 Mon Sep 17 00:00:00 2001
From: zhkag <zhkag@foxmail.com>
Date: Wed, 21 Jun 2023 10:22:42 +0000
Subject: [Kernel] message 可以返回消息的实际大小 (#7709)
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---
 documentation/device/uart/uart.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'documentation/device/uart/uart.md')

diff --git a/documentation/device/uart/uart.md b/documentation/device/uart/uart.md
index d49a005019..92ca9b4bf8 100644
--- a/documentation/device/uart/uart.md
+++ b/documentation/device/uart/uart.md
@@ -575,7 +575,7 @@ static void serial_thread_entry(void *parameter)
         rt_memset(&msg, 0, sizeof(msg));
         /* Read messages from the message queue*/
         result = rt_mq_recv(&rx_mq, &msg, sizeof(msg), RT_WAITING_FOREVER);
-        if (result == RT_EOK)
+        if (result >= 0)
         {
             /*Read data from the serial port*/
             rx_length = rt_device_read(msg.dev, 0, rx_buffer, msg.size);
-- 
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