diff options
| author | thread-liu <[email protected]> | 2020-10-30 10:32:44 +0800 |
|---|---|---|
| committer | thread-liu <[email protected]> | 2020-11-02 15:00:12 +0800 |
| commit | ea89767f2ce50078f6dc161189c4a15720ccee7f (patch) | |
| tree | d271e308f0aad43bf93bd60decd66f0657bdeeee | |
| parent | 7f50e7f22b305088ac7c0c1009c9385362cca371 (diff) | |
[update] check whether it's a same console device.
| -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) |