asus-wmi: use ASUS_WMI_METHODID_DSTS2 as default DSTS ID.

commit 63a78bb1051b240417daad3a3fa9c1bb10646dca upstream.

According to responses from the BIOS team, ASUS_WMI_METHODID_DSTS2
(0x53545344) will be used as future DSTS ID. In addition, calling
asus_wmi_evaluate_method(ASUS_WMI_METHODID_DSTS2, 0, 0, NULL) returns
ASUS_WMI_UNSUPPORTED_METHOD in new ASUS laptop PCs. This patch fixes
no DSTS ID will be assigned in this case.

Signed-off-by: Alex Hung <alex.hung@canonical.com>
Signed-off-by: Matthew Garrett <mjg@redhat.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>

diff --git a/drivers/platform/x86/asus-wmi.c b/drivers/platform/x86/asus-wmi.c
index d1049ee..26fba2d 100644 (file)
--- a/drivers/platform/x86/asus-wmi.c
+++ b/drivers/platform/x86/asus-wmi.c
@@ -1431,14 +1431,9 @@ static int asus_wmi_platform_init(struct asus_wmi *asus)
         */
        if (!asus_wmi_evaluate_method(ASUS_WMI_METHODID_DSTS, 0, 0, NULL))
                asus->dsts_id = ASUS_WMI_METHODID_DSTS;
-       else if (!asus_wmi_evaluate_method(ASUS_WMI_METHODID_DSTS2, 0, 0, NULL))
+       else
                asus->dsts_id = ASUS_WMI_METHODID_DSTS2;
 
-       if (!asus->dsts_id) {
-               pr_err("Can't find DSTS");
-               return -ENODEV;
-       }
-
        /* CWAP allow to define the behavior of the Fn+F2 key,
         * this method doesn't seems to be present on Eee PCs */
        if (asus->driver->wapf >= 0)