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03f159df3e
[ Upstream commit97b726eb1d] The WMI driver core only supports GUID strings containing only uppercase characters, however the GUID string used by the msi-wmi-platform driver contains a single lowercase character. This prevents the WMI driver core from matching said driver to its WMI device. Fix this by turning the lowercase character into a uppercase character. Also update the WMI driver development guide to warn about this. Reported-by: Antheas Kapenekakis <lkml@antheas.dev> Fixes:9c0beb6b29("platform/x86: wmi: Add MSI WMI Platform driver") Tested-by: Antheas Kapenekakis <lkml@antheas.dev> Signed-off-by: Armin Wolf <W_Armin@gmx.de> Link: https://patch.msgid.link/20251110111253.16204-3-W_Armin@gmx.de Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> Signed-off-by: Sasha Levin <sashal@kernel.org>