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:
60faa8f1ac6e ("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>
capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_HOTPLUG_OST_SUPPORT;
capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_PCLPI_SUPPORT;
- capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_PRM_SUPPORT;
+ if (IS_ENABLED(CONFIG_ACPI_PRMT))
+ capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_PRM_SUPPORT;
#ifdef CONFIG_ARM64
capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_GENERIC_INITIATOR_SUPPORT;