Messages in this thread Patch in this message | | | Date | Thu, 14 Jun 2012 16:46:45 +0900 | From | Yasuaki Ishimatsu <> | Subject | [PATCH] acpi : create sun sysfs file in container device |
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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@jp.fujitsu.com>
--- 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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