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ACPI: scan: Make acpi_processor_add() check the device enabled bit

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Modify acpi_processor_add() return an error if _STA returns the enabled
bit clear for the given processor device, so as to avoid using processors
that don't decode their resources, as per the ACPI specification. [1]

Link: https://uefi.org/specs/ACPI/6.5/06_Device_Configuration.html#sta-device-status # [1]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Rafael J. Wysocki 2024-02-26 17:40:52 +01:00
parent 514bcabc05
commit 1b4f02a34f
3 changed files with 9 additions and 0 deletions
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3
drivers/acpi/acpi_processor.c
View File

@ -381,6 +381,9 @@ static int acpi_processor_add(struct acpi_device *device,
struct device *dev;
int result = 0;
if (!acpi_device_is_enabled(device))
return -ENODEV;
pr = kzalloc(sizeof(struct acpi_processor), GFP_KERNEL);
if (!pr)
return -ENOMEM;

1
drivers/acpi/internal.h
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@ -121,6 +121,7 @@ int acpi_device_setup_files(struct acpi_device *dev);
void acpi_device_remove_files(struct acpi_device *dev);
void acpi_device_add_finalize(struct acpi_device *device);
void acpi_free_pnp_ids(struct acpi_device_pnp *pnp);
bool acpi_device_is_enabled(const struct acpi_device *adev);
bool acpi_device_is_present(const struct acpi_device *adev);
bool acpi_device_is_battery(struct acpi_device *adev);
bool acpi_device_is_first_physical_node(struct acpi_device *adev,

5
drivers/acpi/scan.c
View File

@ -1945,6 +1945,11 @@ bool acpi_device_is_present(const struct acpi_device *adev)
return adev->status.present || adev->status.functional;
}
bool acpi_device_is_enabled(const struct acpi_device *adev)
{
return adev->status.present && adev->status.enabled;
}
static bool acpi_scan_handler_matching(struct acpi_scan_handler *handler,
const char *idstr,
const struct acpi_device_id **matchid)