Re: WMI driver no longer load after switching to generic UUID library

[Linus Torvalds]

Andy?

Looking at that commit, it does look like what wmi_parse_guid +
wmi_swap_bytes did was to implement a LE uuid. So the conversion looks
correct, but the fact that it breaks something obviously means that
there's something missing. What's going on?

And dammit, how I hate uuid's and the idiotic byte ordering issue.
It's possibly the only idiotic standard that is even worse than xml.

            Linus

On Sun, May 29, 2016 at 11:35 AM, Kui Zhang <kuizhang@xxxxxxxxx> wrote:
> Hello,
>
> After commit 538d7eb86d58 ("drivers/platform/x86/wmi.c: use generic UUID library")
>
> some keyboard functions stopped working:
>
> clevo-wmi - git://git.code.sf.net/p/clevo-wmi/code
> [   83.877887] Clevo Get GUID not found
>
> /*
> #define CLWMI_GET_GUID "ABBC0F6D-8EA1-11d1-00A0-C90629100000"
>
> ...
>     if(!wmi_has_guid(CLWMI_GET_GUID)) {
>         pr_err("Clevo Get GUID not found\n");
>         return -ENODEV;
>     }
>
>
> */
>
> clevo-xsm-wmi - https://bitbucket.org/lynthium/clevo-xsm-wmi.git
> insmod: ERROR: could not insert module clevo-xsm-wmi.ko: No such device
>
> /*
>
> #define CLEVO_GET_GUID    "ABBC0F6D-8EA1-11D1-00A0-C90629100000"
>
> ...
>
>     if (!wmi_has_guid(CLEVO_GET_GUID)) {
>         CLEVO_XSM_INFO("No known WMI control method GUID found\n");
>         return -ENODEV;
>     }
>
> */
>
>
> thanks
> Kui.Z