From: Ben Gras <ben@minix3.org>
Date: Thu, 10 Jul 2014 19:07:43 +0000 (+0200)
Subject: i386 rs232: do full write in out_int
X-Git-Tag: v3.3.0~134
X-Git-Url: http://zhaoyanbai.com/repos/Bv9ARM.ch13.html?a=commitdiff_plain;h=ebe3309a133cef1e70e36e6071b9f326291ff69d;p=minix.git

i386 rs232: do full write in out_int

	. in kvm, this does the full output without truncating
	  and gets rid of the messy 'enough!' case
---

diff --git a/drivers/tty/arch/i386/rs232.c b/drivers/tty/arch/i386/rs232.c
index 0e29628e3..d65107740 100644
--- a/drivers/tty/arch/i386/rs232.c
+++ b/drivers/tty/arch/i386/rs232.c
@@ -820,7 +820,7 @@ static void out_int(register rs232_t *rs)
  * Notify TTY when the buffer goes empty.
  */
 
-  if (rs->ostate >= (ODEVREADY | OQUEUED | OSWREADY)) {
+  while (txready(rs) && rs->ostate >= (ODEVREADY | OQUEUED | OSWREADY)) {
 	/* Bit test allows ORAW and requires the others. */
 	sys_outb(rs->xmit_port, *rs->otail);
 	if (++rs->otail == bufend(rs->obuf)) rs->otail = rs->obuf;