From a48e23385fcf397e69e2a75d72a81c545ec8bec2 Mon Sep 17 00:00:00 2001 From: Mattias Jacobsson <2pi@mok.nu> Date: Mon, 27 May 2019 18:21:29 +0200 Subject: 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 --- drivers/platform/x86/wmi.c | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+) (limited to 'drivers/platform') diff --git a/drivers/platform/x86/wmi.c b/drivers/platform/x86/wmi.c index b08ffb769cbe..f3be1c008856 100644 --- a/drivers/platform/x86/wmi.c +++ b/drivers/platform/x86/wmi.c @@ -146,6 +146,28 @@ static bool find_guid(const char *guid_string, struct wmi_block **out) return false; } +static const void *find_guid_context(struct wmi_block *wblock, + struct wmi_driver *wdriver) +{ + const struct wmi_device_id *id; + uuid_le guid_input; + + if (wblock == NULL || wdriver == NULL) + return NULL; + if (wdriver->id_table == NULL) + return NULL; + + id = wdriver->id_table; + while (*id->guid_string) { + if (uuid_le_to_bin(id->guid_string, &guid_input)) + continue; + if (!memcmp(wblock->gblock.guid, &guid_input, 16)) + return id->context; + id++; + } + return NULL; +} + static int get_subobj_info(acpi_handle handle, const char *pathname, struct acpi_device_info **info) { -- cgit v1.2.3