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 08:03:19 +0000 (09:03 +0100)
commitbc8c423a286a47195bbb7e8a57d67bef60d7419f
tree8fb47ffbba4db55445c809ed611e55421d0a778c
parent8e4d2ac4348a55d6ac9a3bc8a5bc044c7bca6d71
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