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ACPI: processor: idle: Add debug log for states with invalid entry methods

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According to ACPI spec, entry method in LPI sub-package must be a
buffer or an integer.

The driver will disable the state whose the entry method is invalid
by zeroing flags in struct acpi_lpi_state.

The entry method is very key in cpuidle. A debug log is very useful
for developers.

Signed-off-by: Huisong Li <lihuisong@huawei.com>
Reviewed-by: Jonathan Cameron <jonathan.cameron@huawei.com>
[ rjw: Subject and changelog edits, changed "illegal" to "invalid" ]
Link: https://patch.msgid.link/20251125064702.3666149-1-lihuisong@huawei.com
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Huisong Li
2025-11-25 14:47:02 +08:00
committed by Rafael J. Wysocki
parent f132e089fe
commit 9be3520157
1 changed files with 2 additions and 0 deletions
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2
drivers/acpi/processor_idle.c
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@@ -946,6 +946,8 @@ static int acpi_processor_evaluate_lpi(acpi_handle handle,
lpi_state->entry_method = ACPI_CSTATE_INTEGER;
lpi_state->address = obj->integer.value;
} else {
pr_debug("Entry method of state-%d is invalid, disable it.\n",
state_idx);
continue;
}