From mboxrd@z Thu Jan 1 00:00:00 1970 From: Peter Hurley Subject: [PATCH v2] serial: core: Preserve termios c_cflag for console resume Date: Wed, 9 Jul 2014 09:21:14 -0400 Message-ID: <1404912074-9729-2-git-send-email-peter@hurleysoftware.com> References: <1404912074-9729-1-git-send-email-peter@hurleysoftware.com> Return-path: Received: from mailout32.mail01.mtsvc.net ([216.70.64.70]:48585 "EHLO n23.mail01.mtsvc.net" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1755550AbaGINV3 (ORCPT ); Wed, 9 Jul 2014 09:21:29 -0400 In-Reply-To: <1404912074-9729-1-git-send-email-peter@hurleysoftware.com> Sender: linux-serial-owner@vger.kernel.org List-Id: linux-serial@vger.kernel.org To: Greg Kroah-Hartman Cc: One Thousand Gnomes , linux-kernel@vger.kernel.org, linux-serial@vger.kernel.org, Peter Hurley , Alan Cox When a tty is opened for the serial console, the termios c_cflag settings are inherited from the console line settings. However, if the tty is subsequently closed, the termios settings are lost. This results in a garbled console if the console is later suspended and resumed. Preserve the termios c_cflag for the serial console when the tty is shutdown; this reflects the most recent line settings. Fixes: Bugzilla #69751, 'serial console does not wake from S3' Reported-by: Valerio Vanni Cc: Alan Cox Signed-off-by: Peter Hurley --- drivers/tty/serial/serial_core.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c index b68550d..aab7190 100644 --- a/drivers/tty/serial/serial_core.c +++ b/drivers/tty/serial/serial_core.c @@ -239,6 +239,9 @@ static void uart_shutdown(struct tty_struct *tty, struct uart_state *state) /* * Turn off DTR and RTS early. */ + if (uart_console(uport) && tty) + uport->cons->cflag = tty->termios.c_cflag; + if (!tty || (tty->termios.c_cflag & HUPCL)) uart_clear_mctrl(uport, TIOCM_DTR | TIOCM_RTS); -- 2.0.0