From: Johan Hovold <johan@kernel.org>
To: Rob Herring <robh@kernel.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Jiri Slaby <jslaby@suse.com>,
linux-serial@vger.kernel.org, linux-kernel@vger.kernel.org,
Johan Hovold <johan@kernel.org>
Subject: [PATCH 7/8] serdev: ttyport: ignore carrier detect to avoid hangups
Date: Fri, 3 Nov 2017 15:30:58 +0100 [thread overview]
Message-ID: <20171103143059.20749-8-johan@kernel.org> (raw)
In-Reply-To: <20171103143059.20749-1-johan@kernel.org>
Serdev currently does not support hangups so make sure to set CLOCAL to
prevent loss of carrier from triggering one.
Note however that not all tty drivers honour CLOCAL.
Signed-off-by: Johan Hovold <johan@kernel.org>
---
drivers/tty/serdev/serdev-ttyport.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/tty/serdev/serdev-ttyport.c b/drivers/tty/serdev/serdev-ttyport.c
index a8ddcd2ac5ea..727664ef456c 100644
--- a/drivers/tty/serdev/serdev-ttyport.c
+++ b/drivers/tty/serdev/serdev-ttyport.c
@@ -141,6 +141,8 @@ static int ttyport_open(struct serdev_controller *ctrl)
ktermios.c_cflag &= ~(CSIZE | PARENB);
ktermios.c_cflag |= CS8;
ktermios.c_cflag |= CRTSCTS;
+ /* Hangups are not supported so make sure to ignore carrier detect. */
+ ktermios.c_cflag |= CLOCAL;
tty_set_termios(tty, &ktermios);
set_bit(SERPORT_ACTIVE, &serport->flags);
--
2.15.0
next prev parent reply other threads:[~2017-11-03 14:30 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-11-03 14:30 [PATCH 0/8] serdev: receive_buf and locking fixes Johan Hovold
2017-11-03 14:30 ` [PATCH 1/8] serdev: ttyport: add missing receive_buf sanity checks Johan Hovold
2017-11-03 14:30 ` [PATCH 2/8] serdev: fix receive_buf return value when no callback Johan Hovold
2017-11-03 14:30 ` [PATCH 3/8] serdev: document driver callbacks Johan Hovold
2017-11-03 14:30 ` [PATCH 4/8] serdev: ttyport: fix NULL-deref on hangup Johan Hovold
2017-11-03 14:30 ` [PATCH 5/8] serdev: ttyport: fix tty locking in close Johan Hovold
2017-11-03 14:30 ` [PATCH 6/8] serdev: ttyport: release tty lock sooner on open Johan Hovold
2017-11-03 14:30 ` Johan Hovold [this message]
2017-11-03 14:30 ` [PATCH 8/8] serdev: ttyport: do not used keyed wakeup in write_wakeup Johan Hovold
2017-11-28 15:04 ` Greg Kroah-Hartman
2017-11-28 15:16 ` Johan Hovold
2017-11-28 19:39 ` Greg Kroah-Hartman
2017-11-29 9:48 ` Johan Hovold
2017-12-15 19:26 ` Greg Kroah-Hartman
2017-12-18 11:03 ` Johan Hovold
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