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Message-Id: <20250203182322.384883-8-W_Armin@gmx.de> Date: Mon, 3 Feb 2025 19:23:22 +0100 From: Armin Wolf <W_Armin@....de> To: james@...iv.tech, markpearson@...ovo.com, jorge.lopez2@...com Cc: jdelvare@...e.com, linux@...ck-us.net, linux-hwmon@...r.kernel.org, linux-kernel@...r.kernel.org, hdegoede@...hat.com, ilpo.jarvinen@...ux.intel.com, platform-driver-x86@...r.kernel.org, corbet@....net, linux-doc@...r.kernel.org Subject: [PATCH 7/7] platform/x86: wmi: Update documentation regarding the GUID-based API Warn WMI driver developers to not use GUID-based and non-GUID-based functions for querying WMI data blocks and handling WMI events simultaneously on the same device, as this will corrupt the WMI device state and might thus lead to erratic behaviour. Signed-off-by: Armin Wolf <W_Armin@....de> --- Documentation/wmi/driver-development-guide.rst | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/Documentation/wmi/driver-development-guide.rst b/Documentation/wmi/driver-development-guide.rst index f7e1089a0559..99ef21fc1c1e 100644 --- a/Documentation/wmi/driver-development-guide.rst +++ b/Documentation/wmi/driver-development-guide.rst @@ -96,6 +96,10 @@ on a given machine. Because of this, WMI drivers should use the state container design pattern as described in Documentation/driver-api/driver-model/design-patterns.rst. +.. warning:: Using both GUID-based and non-GUID-based functions for querying WMI data blocks and + handling WMI events simultaneously on the same device is guaranteed to corrupt the + WMI device state and might lead to erratic behaviour. + WMI method drivers ------------------ -- 2.39.5
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