Patch "Input: goodix - disable IRQs while suspended" has been added to the 4.14-stable tree

[<gregkh@linuxfoundation.org>]

This is a note to let you know that I've just added the patch titled

    Input: goodix - disable IRQs while suspended

to the 4.14-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:
     input-goodix-disable-irqs-while-suspended.patch
and it can be found in the queue-4.14 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From foo@baz Mon Apr  9 13:58:16 CEST 2018
From: Hans de Goede <hdegoede@redhat.com>
Date: Fri, 12 Jan 2018 00:36:48 -0800
Subject: Input: goodix - disable IRQs while suspended

From: Hans de Goede <hdegoede@redhat.com>


[ Upstream commit faec44b6838312484d63e82286087cf2d5ebb891 ]

We should not try to do any i2c transfers before the controller is
resumed (which happens before our resume method gets called).

So we need to disable our IRQ while suspended to enforce this. The
code paths for devices with GPIOs for the int and reset pins already
disable the IRQ the through goodix_free_irq().

This commit also disables the IRQ while suspended for devices without
GPIOs for the int and reset pins.

This fixes the i2c bus sometimes getting stuck after a suspend/resume
causing the touchscreen to sometimes not work after a suspend/resume.
This has been tested on a GPD pocked device.

BugLink: https://github.com/nexus511/gpd-ubuntu-packages/issues/10
BugLink: https://www.reddit.com/r/GPDPocket/comments/7niut2/fix_for_broken_touch_after_resume_all_linux/
Tested-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Bastien Nocera <hadess@hadess.net>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/input/touchscreen/goodix.c |    8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

--- a/drivers/input/touchscreen/goodix.c
+++ b/drivers/input/touchscreen/goodix.c
@@ -808,8 +808,10 @@ static int __maybe_unused goodix_suspend
 	int error;
 
 	/* We need gpio pins to suspend/resume */
-	if (!ts->gpiod_int || !ts->gpiod_rst)
+	if (!ts->gpiod_int || !ts->gpiod_rst) {
+		disable_irq(client->irq);
 		return 0;
+	}
 
 	wait_for_completion(&ts->firmware_loading_complete);
 
@@ -849,8 +851,10 @@ static int __maybe_unused goodix_resume(
 	struct goodix_ts_data *ts = i2c_get_clientdata(client);
 	int error;
 
-	if (!ts->gpiod_int || !ts->gpiod_rst)
+	if (!ts->gpiod_int || !ts->gpiod_rst) {
+		enable_irq(client->irq);
 		return 0;
+	}
 
 	/*
 	 * Exit sleep mode by outputting HIGH level to INT pin


Patches currently in stable-queue which might be from hdegoede@redhat.com are

queue-4.14/acpi-video-default-lcd_only-to-true-on-win8-ready-and-newer-machines.patch
queue-4.14/input-goodix-disable-irqs-while-suspended.patch
queue-4.14/asoc-intel-cht_bsw_rt5645-analog-mic-support.patch
queue-4.14/power-supply-axp288_charger-properly-stop-work-on-probe-error-remove.patch
queue-4.14/pinctrl-baytrail-enable-glitch-filter-for-gpios-used-as-interrupts.patch