Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-09-20 23:13:00 +00:00
Code Issues Packages Projects Releases Wiki Activity

ACPI: acpi_pad: Still evaluate _OST when _PUR evaluation fails

Browse Source 
The ACPI specification says that if no action was performed when
processing the _PUR object, _OST should still be evaluated, albeit
with a different status code.

Evaluate _OST even when evaluating _PUR fails, to signal the firmware
that no action was performed.

Compile-tested only.

Signed-off-by: Armin Wolf <W_Armin@gmx.de>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Armin Wolf 2024-06-09 23:09:08 +02:00 committed by Rafael J. Wysocki
parent 83a7eefedc
commit 117478c9d7
1 changed files with 15 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

19
drivers/acpi/acpi_pad.c
View File

@ -25,6 +25,10 @@
#define ACPI_PROCESSOR_AGGREGATOR_CLASS "acpi_pad"
#define ACPI_PROCESSOR_AGGREGATOR_DEVICE_NAME "Processor Aggregator"
#define ACPI_PROCESSOR_AGGREGATOR_NOTIFY 0x80
#define ACPI_PROCESSOR_AGGREGATOR_STATUS_SUCCESS 0
#define ACPI_PROCESSOR_AGGREGATOR_STATUS_NO_ACTION 1
static DEFINE_MUTEX(isolated_cpus_lock);
static DEFINE_MUTEX(round_robin_lock);
@ -382,16 +386,23 @@ static void acpi_pad_handle_notify(acpi_handle handle)
.length = 4,
.pointer = (void *)&idle_cpus,
};
u32 status;
mutex_lock(&isolated_cpus_lock);
num_cpus = acpi_pad_pur(handle);
if (num_cpus < 0) {
mutex_unlock(&isolated_cpus_lock);
return;
/* The ACPI specification says that if no action was performed when
* processing the _PUR object, _OST should still be evaluated, albeit
* with a different status code.
*/
status = ACPI_PROCESSOR_AGGREGATOR_STATUS_NO_ACTION;
} else {
status = ACPI_PROCESSOR_AGGREGATOR_STATUS_SUCCESS;
acpi_pad_idle_cpus(num_cpus);
}
acpi_pad_idle_cpus(num_cpus);
idle_cpus = acpi_pad_idle_cpus_num();
acpi_evaluate_ost(handle, ACPI_PROCESSOR_AGGREGATOR_NOTIFY, 0, &param);
acpi_evaluate_ost(handle, ACPI_PROCESSOR_AGGREGATOR_NOTIFY, status, &param);
mutex_unlock(&isolated_cpus_lock);
}