[PATCH 4.19 129/361] thermal: da9062/61: Prevent hardware access during system suspend

From: Greg Kroah-Hartman
Date: Sun Nov 11 2018 - 19:08:35 EST


4.19-stable review patch. If anyone has any objections, please let me know.

------------------

From: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>

[ Upstream commit 760eea43f8c6d48684f1f34b8a02fddc1456e849 ]

The workqueue used for monitoring the hardware may run while the device
is already suspended. Fix this by using the freezable system workqueue
instead, cfr. commit 51e20d0e3a60cf46 ("thermal: Prevent polling from
happening during system suspend").

Fixes: 608567aac3206ae8 ("thermal: da9062/61: Thermal junction temperature monitoring driver")
Signed-off-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
Acked-by: Steve Twiss <stwiss.opensource@xxxxxxxxxxx>
Signed-off-by: Eduardo Valentin <edubezval@xxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/thermal/da9062-thermal.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

--- a/drivers/thermal/da9062-thermal.c
+++ b/drivers/thermal/da9062-thermal.c
@@ -106,7 +106,7 @@ static void da9062_thermal_poll_on(struc
THERMAL_EVENT_UNSPECIFIED);

delay = msecs_to_jiffies(thermal->zone->passive_delay);
- schedule_delayed_work(&thermal->work, delay);
+ queue_delayed_work(system_freezable_wq, &thermal->work, delay);
return;
}

@@ -125,7 +125,7 @@ static irqreturn_t da9062_thermal_irq_ha
struct da9062_thermal *thermal = data;

disable_irq_nosync(thermal->irq);
- schedule_delayed_work(&thermal->work, 0);
+ queue_delayed_work(system_freezable_wq, &thermal->work, 0);

return IRQ_HANDLED;
}