From a8a2ea7b389673f3f3fa0996b8129e986d8c3f3d Mon Sep 17 00:00:00 2001
From: Chen Yi Qun <chenyiqun@espressif.com>
Date: Fri, 28 Aug 2020 16:09:46 +0800
Subject: [PATCH] UART: Add return in uart_wait_tx_done

uart_wait_tx_done quit due to timeout but without return ESP_ERR_TIMEOUT.
---
 components/driver/uart.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/components/driver/uart.c b/components/driver/uart.c
index 195da2ebab..3fbdeabee9 100644
--- a/components/driver/uart.c
+++ b/components/driver/uart.c
@@ -1025,6 +1025,7 @@ esp_err_t uart_wait_tx_done(uart_port_t uart_num, TickType_t ticks_to_wait)
         uart_hal_disable_intr_mask(&(uart_context[uart_num].hal), UART_INTR_TX_DONE);
         UART_EXIT_CRITICAL(&(uart_context[uart_num].spinlock));
         xSemaphoreGive(p_uart_obj[uart_num]->tx_mux);
+        return ESP_ERR_TIMEOUT;
     }
     xSemaphoreGive(p_uart_obj[uart_num]->tx_mux);
     return ESP_OK;