[SRU] [G/Unstable/OEM-5.10] [PATCH 0/7] Prevent thermal shutdown during boot process

[Kai-Heng Feng]

BugLink: https://bugs.launchpad.net/bugs/1906168

[Impact]
Surprising thermal shutdown at boot on Intel based mobile workstations.

[Fix]
Since these thermal devcies are not in ACPI ThermalZone, OS shouldn't
shutdown the system.

These critial temperatures are for usespace to handle, so let kernel
know it shouldn't handle it.

[Test]
Use reboot stress as a reproducer. 5% chance to see a surprising
shutdown at boot.

With the fix applied, the thermal shutdown is no longer reproducible.

[Where problems could occur]
For ACPI based platforms, we still have "acpitz" to protect systems from
overheating. If these acpitz sensors don't work, then the system could
face real overheating issue.

Daniel Lezcano (5):
  thermal/core: Emit a warning if the thermal zone is updated without
    ops
  thermal/core: Add critical and hot ops
  thermal/drivers/acpi: Use hot and critical ops
  thermal/drivers/rcar: Remove notification usage
  thermal/core: Remove notify ops

Kai-Heng Feng (2):
  thermal: int340x: Fix unexpected shutdown at critical temperature
  thermal: intel: pch: Fix unexpected shutdown at critical temperature

 drivers/acpi/thermal.c                        | 30 ++++++------
 .../int340x_thermal/int340x_thermal_zone.c    |  6 +++
 drivers/thermal/intel/intel_pch_thermal.c     |  6 +++
 drivers/thermal/rcar_thermal.c                | 19 -------
 drivers/thermal/thermal_core.c                | 49 +++++++++++--------
 include/linux/thermal.h                       |  5 +-
 6 files changed, 58 insertions(+), 57 deletions(-)

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2.29.2