diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/kservice.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/src/kservice.c b/src/kservice.c index 7caf43ce28..0a74f05268 100644 --- a/src/kservice.c +++ b/src/kservice.c @@ -1116,7 +1116,7 @@ RTM_EXPORT(rt_console_get_device); * * @param name the name of new console device * - * @return the old console device handler + * @return the old console device handler on successful, or RT_NULL on failure. */ rt_device_t rt_console_set_device(const char *name) { @@ -1127,6 +1127,10 @@ rt_device_t rt_console_set_device(const char *name) /* find new console device */ new_device = rt_device_find(name); + + /* check whether it's a same device */ + if (new_device == old_device) return RT_NULL; + if (new_device != RT_NULL) { if (_console_device != RT_NULL) |