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-rw-r--r--Documentation/wmi/devices/msi-wmi-platform.rst4
1 files changed, 4 insertions, 0 deletions
diff --git a/Documentation/wmi/devices/msi-wmi-platform.rst b/Documentation/wmi/devices/msi-wmi-platform.rst
index 31a136942892..73197b31926a 100644
--- a/Documentation/wmi/devices/msi-wmi-platform.rst
+++ b/Documentation/wmi/devices/msi-wmi-platform.rst
@@ -138,6 +138,10 @@ input data, the meaning of which depends on the subfeature being accessed.
The output buffer contains a single byte which signals success or failure (``0x00`` on failure)
and 31 bytes of output data, the meaning if which depends on the subfeature being accessed.
+.. note::
+ The ACPI control method responsible for handling the WMI method calls is not thread-safe.
+ This is a firmware bug that needs to be handled inside the driver itself.
+
WMI method Get_EC()
-------------------