ACPI: Do not singal PRM support if not enabled

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If the OS confirms PRM (Platform Runtime Mechanism) support through
the \_SB._OSC PRM bit, the BIOS may start relying on the presence of
PRM support in the OS, so prevent the PRM bit from being set in the
\_SB._OSC capabilities bitmask when PRM support is not built in so
as to avoid confusing the BIOS in that case.

Fixes: 60faa8f1ac ("ACPI: Add \_SB._OSC bit for PRM")
Signed-off-by: Aubrey Li <aubrey.li@linux.intel.com>
[ rjw: Rewrite subject and changelog, replace #ifdef with if (IS_ENABLED()) ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

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Aubrey Li 2021-07-02 15:03:50 +08:00 • committed by Rafael J. Wysocki

parent bd7a94c0fa

commit 392ed6a789

1 changed files with 2 additions and 1 deletions

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drivers/acpi/bus.c

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