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platform/x86: wmi: add context pointer field to struct wmi_device_id

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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>
This commit is contained in:
Mattias Jacobsson 2019-05-27 18:21:29 +02:00 committed by Andy Shevchenko
parent 3e58167ac3
commit a48e23385f
2 changed files with 23 additions and 0 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

22
drivers/platform/x86/wmi.c
View file

@ -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)
{

1
include/linux/mod_devicetable.h
View file

@ -798,6 +798,7 @@ struct tee_client_device_id {
*/
struct wmi_device_id {
const char guid_string[UUID_STRING_LEN+1];
const void *context;
};
#endif /* LINUX_MOD_DEVICETABLE_H */