diff options
| -rw-r--r-- | sys/src/9/port/devuart.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/sys/src/9/port/devuart.c b/sys/src/9/port/devuart.c index 197e695f4..6cc9c46d8 100644 --- a/sys/src/9/port/devuart.c +++ b/sys/src/9/port/devuart.c @@ -318,9 +318,8 @@ uartdrained(void* arg) static void uartdrainoutput(Uart *p) { - if(!p->enabled) + if(!p->enabled || up == nil || !islo()) return; - p->drain = 1; if(waserror()){ p->drain = 0; |