[SRU][J/oracle, F/oracle-5.15][PATCH 0/1] UBUNTU: SAUCE: Revert "rtc: rtc-cmos: Do not check ACPI_FADT_LOW_POWER_S0"

[Cory Todd]

From: Cory Todd <cory.todd at canonical.com>

SRU Justification:

BugLink: https://bugs.launchpad.net/bugs/2011854

[Impact]
On amd64, the RTC alarm interrupt and update interrupt can be enabled but
will never fire.

[Fix]
Revert the commit that disables the use of HPET. These systems do not have
a functional CMOS RTC and have been relying on HPET for these interrupts
to work.

[Test Plan]
1. Provision three vms: both instance types reporting the regression
   and another instance type not reporting a regression.
2. Install and boot test kernel
3. Run ltp rtc01 regression test, all cases pass

[Where Problems Could Occur]
The BIOS on these systems could be updated and these interrupts would
continue to use HPET even though a functional CMOS RTC might be available.

Cory Todd (1):
  UBUNTU: SAUCE: Revert "rtc: rtc-cmos: Do not check
    ACPI_FADT_LOW_POWER_S0"

 drivers/rtc/rtc-cmos.c | 3 +++
 1 file changed, 3 insertions(+)

--
2.40.0