thermal: core: Reset previous low and high trip during thermal zone init
authorManaf Meethalavalappu Pallikunhi <manafm@codeaurora.org>
Tue, 2 Nov 2021 20:00:40 +0000 (01:30 +0530)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Wed, 8 Dec 2021 07:46:54 +0000 (08:46 +0100)
commitad4d6cd6a2e3bcf409868f25be250c7b319e8a2c
tree1487ffeeff1d176536c416aa6766d810ecc976fa
parente4e7b95df3e224ff2a1f9c7bc25c5e2fa81ce7d8
thermal: core: Reset previous low and high trip during thermal zone init

[ Upstream commit 99b63316c39988039965693f5f43d8b4ccb1c86c ]

During the suspend is in process, thermal_zone_device_update bails out
thermal zone re-evaluation for any sensor trip violation without
setting next valid trip to that sensor. It assumes during resume
it will re-evaluate same thermal zone and update trip. But when it is
in suspend temperature goes down and on resume path while updating
thermal zone if temperature is less than previously violated trip,
thermal zone set trip function evaluates the same previous high and
previous low trip as new high and low trip. Since there is no change
in high/low trip, it bails out from thermal zone set trip API without
setting any trip. It leads to a case where sensor high trip or low
trip is disabled forever even though thermal zone has a valid high
or low trip.

During thermal zone device init, reset thermal zone previous high
and low trip. It resolves above mentioned scenario.

Signed-off-by: Manaf Meethalavalappu Pallikunhi <manafm@codeaurora.org>
Reviewed-by: Thara Gopinath <thara.gopinath@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
drivers/thermal/thermal_core.c