The patch 
3dda3b3798f9: "platform/x86: Add custom surface3 platform
device for controlling LID" from Nov 25, 2016, leads to the following
static checker warning:
        drivers/platform/x86/surface3-wmi.c:168 s3_wmi_check_platform_device()
        error: uninitialized symbol 'ts_adev'.
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
 
 
 static int s3_wmi_check_platform_device(struct device *dev, void *data)
 {
-       struct acpi_device *adev, *ts_adev;
+       struct acpi_device *adev, *ts_adev = NULL;
        acpi_handle handle;
        acpi_status status;