From mboxrd@z Thu Jan  1 00:00:00 1970
From: =?UTF-8?q?Uwe=20Kleine-K=C3=B6nig?= <u.kleine-koenig@pengutronix.de>
Date: Tue,  6 Mar 2018 10:44:43 +0100
Message-Id: <20180306094444.4875-1-u.kleine-koenig@pengutronix.de>
MIME-Version: 1.0
Content-Type: text/plain; charset="utf-8"
Content-Transfer-Encoding: 8bit
Subject: [OSS-Tools] [PATCH 1/2] serial: open port with O_NONBLOCK
List-Id: Pengutronix Public Open-Source-Development <oss-tools.pengutronix.de>
List-Unsubscribe: <http://metis.pengutronix.de/cgi-bin/mailman/options/oss-tools>, 
 <mailto:oss-tools-request@pengutronix.de?subject=unsubscribe>
List-Archive: <http://metis.pengutronix.de/cgi-bin/mailman/private/oss-tools/>
List-Post: <mailto:oss-tools@pengutronix.de>
List-Help: <mailto:oss-tools-request@pengutronix.de?subject=help>
List-Subscribe: <http://metis.pengutronix.de/cgi-bin/mailman/listinfo/oss-tools>, 
 <mailto:oss-tools-request@pengutronix.de?subject=subscribe>
To: oss-tools@pengutronix.de

I don't know when this is necessary, but sometimes the pl2303 on an
espressobin board blocks on open() otherwise. kermit uses O_NONBLOCK,
too.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
---
 serial.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/serial.c b/serial.c
index 00b817d9c94f..0778fe1d8698 100644
--- a/serial.c
+++ b/serial.c
@@ -203,7 +203,7 @@ struct ios_ops * serial_init(char *device)
 	close(fd);
 force:
 	/* open the device */
-	fd = open(device, O_RDWR);
+	fd = open(device, O_RDWR | O_NONBLOCK);
 	ops->fd = fd;
 
 	if (fd < 0) {
-- 
2.16.1