[errno code][-RT_ERROR] fix that use RT_ERROR without -

examples/rt-link/rtlink_dev_example.c

@@ -311,18 +311,18 @@ void create_thead_to_test_speed(rt_uint8_t mutil_num)
     }
 }
 
-static void rtlink_dwrite(int argc, char *argv[])
+static rt_err_t rtlink_dwrite(int argc, char *argv[])
 {
     char *data = RT_NULL;
     rt_size_t length = 0;
     rt_uint16_t count = 0;
-    rt_size_t ret = RT_ERROR;
+    rt_size_t ret = -RT_ERROR;
 
     rt_device_t dev = rt_device_find(RTLINK01);
     if (dev == RT_NULL)
     {
         LOG_E("device not find!");
-        return ;
+        return ret;
     }
 
     if (argc == 1)
@@ -352,6 +352,7 @@ static void rtlink_dwrite(int argc, char *argv[])
             LOG_E("Invalid parameter.");
         }
     }
+    return ret;
 }
 MSH_CMD_EXPORT(rtlink_dwrite, rtlink device interface example);
 

examples/test/device_test.c

@@ -465,7 +465,7 @@ __return:
         rt_free(write_buffer);
     }
     rt_device_close(device);
-    return RT_ERROR;
+    return -RT_ERROR;
 }
 
 int device_test(const char * device_name)
@@ -477,7 +477,7 @@ int device_test(const char * device_name)
     if( device == RT_NULL)
     {
         rt_kprintf("device %s: not found!\r\n", device_name);
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     // step 2:init device
@@ -505,7 +505,7 @@ int device_test(const char * device_name)
         return _block_device_test(device);
     default:
         rt_kprintf("unkown device type : %02X",device->type);
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 }
 

examples/test/rtc_test.c

@@ -27,7 +27,7 @@ int rtc_test(void)
     if(ret != RT_EOK)
     {
         rt_kprintf("[RTC Test]Set RTC Date failed\n");
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     rt_thread_delay(RT_TICK_PER_SECOND);
@@ -36,7 +36,7 @@ int rtc_test(void)
     if(ret != RT_EOK)
     {
         rt_kprintf("[RTC Test]Set RTC Time failed\n");
-        return RT_ERROR;
+        return -RT_ERROR;
     }
 
     rt_thread_delay(RT_TICK_PER_SECOND);

examples/utest/testcases/kernel/thread_tc.c

@@ -1,4 +1,4 @@
-/*
+ /*
  * Copyright (c) 2006-2021, RT-Thread Development Team
  *
  * SPDX-License-Identifier: Apache-2.0
@@ -97,7 +97,7 @@ static void test_static_thread(void)
 {
     rt_err_t ret_init = -RT_ERROR;
     rt_err_t ret_startup = -RT_ERROR;
-    rt_err_t ret_detach = - RT_ERROR;
+    rt_err_t ret_detach = -RT_ERROR;
 
     ret_init = rt_thread_init(&thread2,
                               "thread2",