From: David van Moolenbroek <david@minix3.org>
Date: Fri, 4 Oct 2013 23:40:58 +0000 (+0200)
Subject: TTY: fix earlier PTY select "improvement"
X-Git-Tag: v3.3.0~533
X-Git-Url: http://zhaoyanbai.com/repos/?a=commitdiff_plain;h=b058039a350e8a150b95a143e52104a8f1711b81;p=minix.git

TTY: fix earlier PTY select "improvement"

It was just plain wrong.

Change-Id: Ieab4b4f01d9461e05e0d0ba6427a99d863d6b98d
---

diff --git a/drivers/tty/pty.c b/drivers/tty/pty.c
index 6f3d0fcdb..22b108f42 100644
--- a/drivers/tty/pty.c
+++ b/drivers/tty/pty.c
@@ -269,7 +269,7 @@ static int select_try_pty(tty_t *tp, int ops)
 	/* Write won't block on error. */
 	if (pp->state & TTY_CLOSED) r |= CDEV_OP_WR;
 	else if (pp->wrleft != 0 || pp->wrcum != 0) r |= CDEV_OP_WR;
-	else if (tp->tty_inleft > 0) r |= CDEV_OP_WR;	/* There's a reader. */
+	else if (tp->tty_incount < buflen(tp->tty_inbuf)) r |= CDEV_OP_WR;
   }
 
   if (ops & CDEV_OP_RD) {