serial: open port with O_NONBLOCK

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>

1 files changed, 1 insertions, 1 deletions

diff --git a/serial.c b/serial.c
index 00b817d..0778fe1 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) {