From 1a24bc71fda8ecb6f3247786a54c325020571dcc Mon Sep 17 00:00:00 2001
From: David du Colombier <0intro@gmail.com>
Date: Fri, 24 Jan 2003 00:00:00 +0000
Subject: [PATCH] Plan 9 from Bell Labs 2003-01-24

---
 port/devuart.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/port/devuart.c b/port/devuart.c
index b7690bbfa5643430aee580ab185876453aa4bad5..9cd99bba1a47e8a4b1e8250ac853aa410ffb6d30 100644
--- a/port/devuart.c
+++ b/port/devuart.c
@@ -350,6 +350,7 @@ uartctl(Uart *p, char *cmd)
 		switch(*f[i]){
 		case 'B':
 		case 'b':
+			sleep(&p->r, uartdrained, p);
 			if((*p->phys->baud)(p, n) < 0)
 				return -1;
 			break;
@@ -359,6 +360,7 @@ uartctl(Uart *p, char *cmd)
 			break;
 		case 'D':
 		case 'd':
+			sleep(&p->r, uartdrained, p);
 			(*p->phys->dtr)(p, n);
 			break;
 		case 'E':
@@ -379,19 +381,23 @@ uartctl(Uart *p, char *cmd)
 			break;
 		case 'i':
 		case 'I':
+			sleep(&p->r, uartdrained, p);
 			(*p->phys->fifo)(p, n);
 			break;
 		case 'K':
 		case 'k':
+			sleep(&p->r, uartdrained, p);
 			(*p->phys->dobreak)(p, n);
 			break;
 		case 'L':
 		case 'l':
+			sleep(&p->r, uartdrained, p);
 			if((*p->phys->bits)(p, n) < 0)
 				return -1;
 			break;
 		case 'm':
 		case 'M':
+			sleep(&p->r, uartdrained, p);
 			(*p->phys->modemctl)(p, n);
 			break;
 		case 'n':
@@ -401,6 +407,7 @@ uartctl(Uart *p, char *cmd)
 			break;
 		case 'P':
 		case 'p':
+			sleep(&p->r, uartdrained, p);
 			if((*p->phys->parity)(p, *(f[i]+1)) < 0)
 				return -1;
 			break;
@@ -413,10 +420,12 @@ uartctl(Uart *p, char *cmd)
 			break;
 		case 'R':
 		case 'r':
+			sleep(&p->r, uartdrained, p);
 			(*p->phys->rts)(p, n);
 			break;
 		case 'S':
 		case 's':
+			sleep(&p->r, uartdrained, p);
 			if((*p->phys->stop)(p, n) < 0)
 				return -1;
 			break;
@@ -477,7 +486,6 @@ uartwrite(Chan *c, void *buf, long n, vlong)
 		}
 
 		/* let output drain */
-		sleep(&p->r, uartdrained, p);
 		if(uartctl(p, cmd) < 0)
 			error(Ebadarg);