HID: uhid: add UHID_START and UHID_STOP events

We send UHID_START and UHID_STOP events to user-space when the HID core
starts/stops the device. This notifies user-space about driver readiness
and data-I/O can start now.

This directly forwards the callbacks from hid-core to user-space.

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

1 files changed, 7 insertions, 1 deletions

diff --git a/drivers/hid/uhid.c b/drivers/hid/uhid.c
index 0d011db30a46..2e7f3a023975 100644
--- a/drivers/hid/uhid.c
+++ b/drivers/hid/uhid.c
@@ -82,11 +82,17 @@ static int uhid_queue_event(struct uhid_device *uhid, __u32 event)
 
 static int uhid_hid_start(struct hid_device *hid)
 {
-        return 0;
+        struct uhid_device *uhid = hid->driver_data;
+
+        return uhid_queue_event(uhid, UHID_START);
 }
 
 static void uhid_hid_stop(struct hid_device *hid)
 {
+        struct uhid_device *uhid = hid->driver_data;
+
+        hid->claimed = 0;
+        uhid_queue_event(uhid, UHID_STOP);
 }
 
 static int uhid_hid_open(struct hid_device *hid)