HID: uhid: forward output request to user-space

If the hid-driver wants to send standardized data to the device it uses a
linux input_event. We forward this to the user-space transport-level
driver so they can perform the requested action on the device.

Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

1 files changed, 18 insertions, 0 deletions

diff --git a/drivers/hid/uhid.c b/drivers/hid/uhid.c
index 0226ba3f5307..4dd693e1c8b8 100644
--- a/drivers/hid/uhid.c
+++ b/drivers/hid/uhid.c
@@ -112,6 +112,24 @@ static void uhid_hid_close(struct hid_device *hid)
 static int uhid_hid_input(struct input_dev *input, unsigned int type,
                           unsigned int code, int value)
 {
+        struct hid_device *hid = input_get_drvdata(input);
+        struct uhid_device *uhid = hid->driver_data;
+        unsigned long flags;
+        struct uhid_event *ev;
+
+        ev = kzalloc(sizeof(*ev), GFP_ATOMIC);
+        if (!ev)
+                return -ENOMEM;
+
+        ev->type = UHID_OUTPUT_EV;
+        ev->u.output_ev.type = type;
+        ev->u.output_ev.code = code;
+        ev->u.output_ev.value = value;
+
+        spin_lock_irqsave(&uhid->qlock, flags);
+        uhid_queue(uhid, ev);
+        spin_unlock_irqrestore(&uhid->qlock, flags);
+
         return 0;
 }