Thermal: do not clear passive state during system sleep
authorWei Wang <wvw@google.com>
Wed, 7 Nov 2018 22:36:11 +0000 (14:36 -0800)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Tue, 12 Feb 2019 18:47:03 +0000 (19:47 +0100)
commitf8a33ec5367e41e7a7641c5c75255d1355581e05
tree1c67d65e635b86fd3a3d55bd80789ebd44aedf0f
parented0526b271b9455b1db12e3788e5a612e0464ff7
Thermal: do not clear passive state during system sleep

[ Upstream commit 964f4843a455d2ffb199512b08be8d5f077c4cac ]

commit ff140fea847e ("Thermal: handle thermal zone device properly
during system sleep") added PM hook to call thermal zone reset during
sleep. However resetting thermal zone will also clear the passive state
and thus cancel the polling queue which leads the passive cooling device
state not being cleared properly after sleep.

thermal_pm_notify => thermal_zone_device_reset set passive to 0
thermal_zone_trip_update will skip update passive as `old_target ==
instance->target'.
monitor_thermal_zone => thermal_zone_device_set_polling will cancel
tz->poll_queue, so the cooling device state will not be changed
afterwards.

Reported-by: Kame Wang <kamewang@google.com>
Signed-off-by: Wei Wang <wvw@google.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
drivers/thermal/thermal_core.c