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@@ -217,6 +217,35 @@ static bool find_guid(const char *guid_string, struct wmi_block **out)
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return 0;
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}
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+static acpi_status wmi_method_enable(struct wmi_block *wblock, int enable)
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+{
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+ struct guid_block *block = NULL;
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+ char method[5];
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+ struct acpi_object_list input;
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+ union acpi_object params[1];
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+ acpi_status status;
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+ acpi_handle handle;
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+
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+ block = &wblock->gblock;
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+ handle = wblock->handle;
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+
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+ if (!block)
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+ return AE_NOT_EXIST;
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+
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+ input.count = 1;
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+ input.pointer = params;
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+ params[0].type = ACPI_TYPE_INTEGER;
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+ params[0].integer.value = enable;
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+
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+ snprintf(method, 5, "WE%02X", block->notify_id);
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+ status = acpi_evaluate_object(handle, method, &input, NULL);
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+
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+ if (status != AE_OK && status != AE_NOT_FOUND)
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+ return status;
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+ else
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+ return AE_OK;
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+}
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+
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/*
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* Exported WMI functions
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*/
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@@ -427,6 +456,7 @@ acpi_status wmi_install_notify_handler(const char *guid,
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wmi_notify_handler handler, void *data)
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{
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struct wmi_block *block;
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+ acpi_status status;
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if (!guid || !handler)
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return AE_BAD_PARAMETER;
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@@ -441,7 +471,9 @@ wmi_notify_handler handler, void *data)
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block->handler = handler;
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block->handler_data = data;
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- return AE_OK;
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+ status = wmi_method_enable(block, 1);
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+
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+ return status;
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}
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EXPORT_SYMBOL_GPL(wmi_install_notify_handler);
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@@ -453,6 +485,7 @@ EXPORT_SYMBOL_GPL(wmi_install_notify_handler);
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acpi_status wmi_remove_notify_handler(const char *guid)
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{
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struct wmi_block *block;
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+ acpi_status status;
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if (!guid)
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return AE_BAD_PARAMETER;
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@@ -464,10 +497,12 @@ acpi_status wmi_remove_notify_handler(const char *guid)
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if (!block->handler)
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return AE_NULL_ENTRY;
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+ status = wmi_method_enable(block, 0);
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+
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block->handler = NULL;
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block->handler_data = NULL;
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- return AE_OK;
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+ return status;
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}
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EXPORT_SYMBOL_GPL(wmi_remove_notify_handler);
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