From 8b18522cfd3f321d52d389c7658a2992d6ea1d2c Mon Sep 17 00:00:00 2001
From: MLW <2544047213@qq.com>
Date: Sun, 3 Mar 2019 14:12:01 +0800
Subject: [PATCH] =?UTF-8?q?=E8=A7=A3=E5=86=B3=5Ftc=5Fflush=E5=8F=AF?=
 =?UTF-8?q?=E8=83=BD=E5=BC=95=E8=B5=B7=E7=9A=84=E7=BC=93=E5=86=B2=E5=8C=BA?=
 =?UTF-8?q?=E5=86=B2=E7=AA=81?=
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---
 components/drivers/serial/serial.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/components/drivers/serial/serial.c b/components/drivers/serial/serial.c
index a03e4a719e..094c403656 100644
--- a/components/drivers/serial/serial.c
+++ b/components/drivers/serial/serial.c
@@ -882,6 +882,7 @@ static int _get_baudrate(speed_t speed)
 
 static void _tc_flush(struct rt_serial_device *serial, int queue)
 {
+    rt_base_t level;
     int ch = -1;
     struct rt_serial_rx_fifo *rx_fifo = RT_NULL;
     struct rt_device *device = RT_NULL;
@@ -901,10 +902,12 @@ static void _tc_flush(struct rt_serial_device *serial, int queue)
             if((device->open_flag & RT_DEVICE_FLAG_INT_RX) || (device->open_flag & RT_DEVICE_FLAG_DMA_RX))
             {
                 RT_ASSERT(RT_NULL != rx_fifo);
+                level = rt_hw_interrupt_disable();
                 rt_memset(rx_fifo->buffer, 0, serial->config.bufsz);
                 rx_fifo->put_index = 0;
                 rx_fifo->get_index = 0;
                 rx_fifo->is_full = RT_FALSE;
+                rt_hw_interrupt_enable(level);
             }
             else
             {