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platform/x86: wmi: add context pointer field to struct wmi_device_id
When using wmi_install_notify_handler() to initialize a WMI handler a data pointer can be supplied which will be passed on to the notification handler. No similar feature exist when handling WMI events via struct wmi_driver. Add a context field pointer to struct wmi_device_id and add a function find_guid_context() to retrieve that context pointer. Signed-off-by: Mattias Jacobsson <2pi@mok.nu> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
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3e58167ac3
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@ -146,6 +146,28 @@ static bool find_guid(const char *guid_string, struct wmi_block **out)
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return false;
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}
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static const void *find_guid_context(struct wmi_block *wblock,
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struct wmi_driver *wdriver)
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{
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const struct wmi_device_id *id;
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uuid_le guid_input;
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if (wblock == NULL || wdriver == NULL)
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return NULL;
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if (wdriver->id_table == NULL)
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return NULL;
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id = wdriver->id_table;
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while (*id->guid_string) {
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if (uuid_le_to_bin(id->guid_string, &guid_input))
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continue;
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if (!memcmp(wblock->gblock.guid, &guid_input, 16))
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return id->context;
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id++;
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}
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return NULL;
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}
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static int get_subobj_info(acpi_handle handle, const char *pathname,
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struct acpi_device_info **info)
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{
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@ -798,6 +798,7 @@ struct tee_client_device_id {
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*/
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struct wmi_device_id {
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const char guid_string[UUID_STRING_LEN+1];
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const void *context;
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};
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#endif /* LINUX_MOD_DEVICETABLE_H */
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