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path: root/drivers/acpi/glue.c
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Diffstat (limited to 'drivers/acpi/glue.c')
-rw-r--r--drivers/acpi/glue.c20
1 files changed, 20 insertions, 0 deletions
diff --git a/drivers/acpi/glue.c b/drivers/acpi/glue.c
index eda0978b57c..06f8634fe58 100644
--- a/drivers/acpi/glue.c
+++ b/drivers/acpi/glue.c
@@ -142,6 +142,7 @@ EXPORT_SYMBOL(acpi_get_physical_device);
static int acpi_bind_one(struct device *dev, acpi_handle handle)
{
+ struct acpi_device *acpi_dev;
acpi_status status;
if (dev->archdata.acpi_handle) {
@@ -157,6 +158,16 @@ static int acpi_bind_one(struct device *dev, acpi_handle handle)
}
dev->archdata.acpi_handle = handle;
+ status = acpi_bus_get_device(handle, &acpi_dev);
+ if (!ACPI_FAILURE(status)) {
+ int ret;
+
+ ret = sysfs_create_link(&dev->kobj, &acpi_dev->dev.kobj,
+ "firmware_node");
+ ret = sysfs_create_link(&acpi_dev->dev.kobj, &dev->kobj,
+ "physical_node");
+ }
+
return 0;
}
@@ -165,8 +176,17 @@ static int acpi_unbind_one(struct device *dev)
if (!dev->archdata.acpi_handle)
return 0;
if (dev == acpi_get_physical_device(dev->archdata.acpi_handle)) {
+ struct acpi_device *acpi_dev;
+
/* acpi_get_physical_device increase refcnt by one */
put_device(dev);
+
+ if (!acpi_bus_get_device(dev->archdata.acpi_handle,
+ &acpi_dev)) {
+ sysfs_remove_link(&dev->kobj, "firmware_node");
+ sysfs_remove_link(&acpi_dev->dev.kobj, "physical_node");
+ }
+
acpi_detach_data(dev->archdata.acpi_handle,
acpi_glue_data_handler);
dev->archdata.acpi_handle = NULL;