The _UID object is optional, but is required when the device has no
other way to report a persistent unique device ID.
This patch is required for ACPI 5.0 ACPI enumerated IP cores.
Signed-off-by: Lv Zheng <lv.zheng@xxxxxxxxx>
---
drivers/acpi/scan.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
index d730a93..bb7fe47 100644
--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -327,6 +327,8 @@ static void acpi_device_release(struct device *dev)
struct acpi_device *acpi_dev = to_acpi_device(dev);
acpi_free_ids(acpi_dev);
+ if (acpi_dev->pnp.unique_id)
+ kfree(acpi_dev->pnp.unique_id);
kfree(acpi_dev);
}
@@ -1162,6 +1164,9 @@ static void acpi_device_set_id(struct acpi_device *device)
device->pnp.bus_address = info->address;
device->flags.bus_address = 1;
}
+ if (info->valid & ACPI_VALID_UID) {
+ device->pnp.unique_id = kstrdup(info->unique_id.string, GFP_KERNEL);
+ }
kfree(info);
--
1.7.10
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