From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:43566 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751671AbeBBKoX (ORCPT ); Fri, 2 Feb 2018 05:44:23 -0500 Subject: Patch "serial: imx: Only wakeup via RTSDEN bit if the system has RTS/CTS" has been added to the 4.15-stable tree To: fabio.estevam@nxp.com, fugang.duan@nxp.com, gregkh@linuxfoundation.org, martin@kaiser.cx Cc: , From: Date: Fri, 02 Feb 2018 11:43:58 +0100 Message-ID: <151756823866198@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org List-ID: This is a note to let you know that I've just added the patch titled serial: imx: Only wakeup via RTSDEN bit if the system has RTS/CTS to the 4.15-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: serial-imx-only-wakeup-via-rtsden-bit-if-the-system-has-rts-cts.patch and it can be found in the queue-4.15 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. >>From 38b1f0fb42f772b8c9aac53593883a18ff5eb9d7 Mon Sep 17 00:00:00 2001 From: Fabio Estevam Date: Thu, 4 Jan 2018 15:58:34 -0200 Subject: serial: imx: Only wakeup via RTSDEN bit if the system has RTS/CTS From: Fabio Estevam commit 38b1f0fb42f772b8c9aac53593883a18ff5eb9d7 upstream. The wakeup mechanism via RTSDEN bit relies on the system using the RTS/CTS lines, so only allow such wakeup method when the system actually has RTS/CTS support. Fixes: bc85734b126f ("serial: imx: allow waking up on RTSD") Signed-off-by: Fabio Estevam Reviewed-by: Martin Kaiser Acked-by: Fugang Duan Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/imx.c | 14 ++++++++------ 1 file changed, 8 insertions(+), 6 deletions(-) --- a/drivers/tty/serial/imx.c +++ b/drivers/tty/serial/imx.c @@ -2238,12 +2238,14 @@ static void serial_imx_enable_wakeup(str val &= ~UCR3_AWAKEN; writel(val, sport->port.membase + UCR3); - val = readl(sport->port.membase + UCR1); - if (on) - val |= UCR1_RTSDEN; - else - val &= ~UCR1_RTSDEN; - writel(val, sport->port.membase + UCR1); + if (sport->have_rtscts) { + val = readl(sport->port.membase + UCR1); + if (on) + val |= UCR1_RTSDEN; + else + val &= ~UCR1_RTSDEN; + writel(val, sport->port.membase + UCR1); + } } static int imx_serial_port_suspend_noirq(struct device *dev) Patches currently in stable-queue which might be from fabio.estevam@nxp.com are queue-4.15/serial-imx-only-wakeup-via-rtsden-bit-if-the-system-has-rts-cts.patch