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[update] check whether it's a same console device.

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thread-liu 2020-10-30 10:32:44 +08:00
parent 7f50e7f22b
commit ea89767f2c
1 changed files with 5 additions and 1 deletions
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6
src/kservice.c
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@ -1116,7 +1116,7 @@ RTM_EXPORT(rt_console_get_device);
* *
* @param name the name of new console 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) 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 */ /* find new console device */
new_device = rt_device_find(name); 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 (new_device != RT_NULL)
{ {
if (_console_device != RT_NULL) if (_console_device != RT_NULL)