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Date: Mon, 15 Sep 2014 15:08:04 -0700 From: Kamal Mostafa <kamal@...onical.com> To: linux-kernel@...r.kernel.org, stable@...r.kernel.org, kernel-team@...ts.ubuntu.com Cc: Peter Hurley <peter@...leysoftware.com>, Greg Kroah-Hartman <gregkh@...uxfoundation.org>, Kamal Mostafa <kamal@...onical.com> Subject: [PATCH 3.13 074/187] serial: core: Preserve termios c_cflag for console resume 3.13.11.7 -stable review patch. If anyone has any objections, please let me know. ------------------ From: Peter Hurley <peter@...leysoftware.com> commit ae84db9661cafc63d179e1d985a2c5b841ff0ac4 upstream. 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 <valerio.vanni@...ind.it> Acked-by: Alan Cox <alan@...ux.intel.com> Signed-off-by: Peter Hurley <peter@...leysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org> Signed-off-by: Kamal Mostafa <kamal@...onical.com> --- 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 0f02351..b5180c1 100644 --- a/drivers/tty/serial/serial_core.c +++ b/drivers/tty/serial/serial_core.c @@ -235,6 +235,9 @@ 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); -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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