diff options
| -rw-r--r-- | drivers/acpi/scan.c | 16 | ||||
| -rw-r--r-- | include/acpi/acpi_bus.h | 1 |
2 files changed, 17 insertions, 0 deletions
diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c index 2c80765670bc..e86e216894c4 100644 --- a/drivers/acpi/scan.c +++ b/drivers/acpi/scan.c @@ -19,6 +19,7 @@ #include <linux/dma-map-ops.h> #include <linux/platform_data/x86/apple.h> #include <linux/pgtable.h> +#include <linux/crc32.h> #include "internal.h" @@ -654,6 +655,19 @@ static int acpi_tie_acpi_dev(struct acpi_device *adev) return 0; } +static void acpi_store_pld_crc(struct acpi_device *adev) +{ + struct acpi_pld_info *pld; + acpi_status status; + + status = acpi_get_physical_device_location(adev->handle, &pld); + if (ACPI_FAILURE(status)) + return; + + adev->pld_crc = crc32(~0, pld, sizeof(*pld)); + ACPI_FREE(pld); +} + static int __acpi_device_add(struct acpi_device *device, void (*release)(struct device *)) { @@ -712,6 +726,8 @@ static int __acpi_device_add(struct acpi_device *device, if (device->wakeup.flags.valid) list_add_tail(&device->wakeup_list, &acpi_wakeup_device_list); + acpi_store_pld_crc(device); + mutex_unlock(&acpi_device_lock); if (device->parent) diff --git a/include/acpi/acpi_bus.h b/include/acpi/acpi_bus.h index 480f9207a4c6..3a1280649ddf 100644 --- a/include/acpi/acpi_bus.h +++ b/include/acpi/acpi_bus.h @@ -358,6 +358,7 @@ struct acpi_gpio_mapping; /* Device */ struct acpi_device { + u32 pld_crc; int device_type; acpi_handle handle; /* no handle for fixed hardware */ struct fwnode_handle fwnode; |