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authorMattias Jacobsson <2pi@mok.nu>2019-05-27 19:21:29 +0300
committerAndy Shevchenko <andriy.shevchenko@linux.intel.com>2019-06-17 15:22:47 +0300
commita48e23385fcf397e69e2a75d72a81c545ec8bec2 (patch)
treeb6e0d215dac9ce32eb308ffe88c337c0b4d483e4 /drivers/platform
parent3e58167ac3703c9b15a8600ab559d239f3d4dd97 (diff)
downloadlinux-a48e23385fcf397e69e2a75d72a81c545ec8bec2.tar.xz
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>
Diffstat (limited to 'drivers/platform')
-rw-r--r--drivers/platform/x86/wmi.c22
1 files changed, 22 insertions, 0 deletions
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)
{