Signed-off-by: Mattia Dongili <malattia@xxxxxxxx>
---
drivers/misc/sony-laptop.c | 20 +++++++++++++++++++-
1 files changed, 19 insertions(+), 1 deletions(-)
diff --git a/drivers/misc/sony-laptop.c b/drivers/misc/sony-laptop.c
index ecac39b..4b15f0c 100644
--- a/drivers/misc/sony-laptop.c
+++ b/drivers/misc/sony-laptop.c
@@ -864,6 +864,15 @@ static int sony_nc_add(struct acpi_device *device)
sony_nc_acpi_handle = device->handle;
+ /* read device status */
+ result = acpi_bus_get_status(device);
+ /* bail IFF the above call was successful and the device is not present */
+ if (!result && !device->status.present) {
+ dprintk("Device not present\n");
+ result = -ENODEV;
+ goto outwalk;
+ }
+
if (debug) {
status = acpi_walk_namespace(ACPI_TYPE_METHOD, sony_nc_acpi_handle,
1, sony_walk_callback, NULL, NULL);
@@ -874,6 +883,15 @@ static int sony_nc_add(struct acpi_device *device)
}
}
+ /* try to _INI the device if such method exists (ACPI spec 3.0-6.5.1
+ * should be respected as we already checked for the device presence above */
+ if (ACPI_SUCCESS(acpi_get_handle(sony_nc_acpi_handle, METHOD_NAME__INI, &handle))) {
+ dprintk("Invoking _INI\n");
+ if (ACPI_FAILURE(acpi_evaluate_object(sony_nc_acpi_handle, METHOD_NAME__INI,
+ NULL, NULL)))
+ dprintk("_INI Method failed\n");
+ }
+
/* setup input devices and helper fifo */
result = sony_laptop_setup_input();
if (result) {
@@ -886,7 +904,7 @@ static int sony_nc_add(struct acpi_device *device)
ACPI_DEVICE_NOTIFY,
sony_acpi_notify, NULL);
if (ACPI_FAILURE(status)) {
- printk(KERN_WARNING DRV_PFX "unable to install notify handler\n");
+ printk(KERN_WARNING DRV_PFX "unable to install notify handler (%u)\n", status);
result = -ENODEV;
goto outinput;
}
--
1.5.2.3
-
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