Even if container device has _SUN method, the method is ignored. So we cannot
know slot-unique ID number of the container device. The patch creates "sun"
file in sysfs so that we can recognize it.
Signed-off-by: Yasuaki Ishimatsu <isimatu.yasuaki@xxxxxxxxxxxxxx>
---
drivers/acpi/container.c | 36 +++++++++++++++++++++++++++++++++---
1 file changed, 33 insertions(+), 3 deletions(-)
Index: linux-3.5-rc1/drivers/acpi/container.c
===================================================================
--- linux-3.5-rc1.orig/drivers/acpi/container.c 2012-06-14 15:35:31.045500166 +0900
+++ linux-3.5-rc1/drivers/acpi/container.c 2012-06-14 16:40:13.010405144 +0900
@@ -32,6 +32,7 @@
#include <linux/slab.h>
#include <linux/types.h>
#include <linux/acpi.h>
+#include <linux/device.h>
#include <acpi/acpi_bus.h>
#include <acpi/acpi_drivers.h>
#include <acpi/container.h>
@@ -93,10 +94,30 @@ static int is_device_present(acpi_handle
}
/*******************************************************************/
+
+static ssize_t acpi_device_sun_show(struct device *dev,
+ struct device_attribute *attr, char *buf) {
+ struct acpi_device *device = to_acpi_device(dev);
+ acpi_status status;
+ unsigned long long sun;
+
+ status = acpi_evaluate_integer(device->handle, "_SUN", NULL, &sun);
+ if (ACPI_FAILURE(status))
+ return 0;
+
+ return sprintf(buf, "%llu\n", sun);
+}
+
+static DEVICE_ATTR(sun, 0444, acpi_device_sun_show, NULL);
+
+/*******************************************************************/
+
static int acpi_container_add(struct acpi_device *device)
{
struct acpi_container *container;
-
+ acpi_status status;
+ acpi_handle temp;
+ int result = 0;
if (!device) {
printk(KERN_ERR PREFIX "device is NULL\n");
@@ -115,13 +136,22 @@ static int acpi_container_add(struct acp
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device <%s> bid <%s>\n",
acpi_device_name(device), acpi_device_bid(device)));
- return 0;
+ status = acpi_get_handle(device->handle, "_SUN", &temp);
+ if (ACPI_SUCCESS(status))
+ result = device_create_file(&device->dev, &dev_attr_sun);
+
+ return result;
}
static int acpi_container_remove(struct acpi_device *device, int type)
{
- acpi_status status = AE_OK;
+ acpi_status status;
struct acpi_container *pc = NULL;
+ acpi_handle temp;
+
+ status = acpi_get_handle(device->handle, "_SUN", &temp);
+ if (ACPI_SUCCESS(status))
+ device_remove_file(&device->dev, &dev_attr_sun);
pc = acpi_driver_data(device);
kfree(pc);
--
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