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@xxxxxxxxxxxxxx>
---
drivers/hid/uhid.c | 8 +++++++-
include/linux/uhid.h | 2 ++
2 files changed, 9 insertions(+), 1 deletion(-)
diff --git a/drivers/hid/uhid.c b/drivers/hid/uhid.c
index 0d011db..2e7f3a0 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)
diff --git a/include/linux/uhid.h b/include/linux/uhid.h
index 6eb42be..f8ce6f7 100644
--- a/include/linux/uhid.h
+++ b/include/linux/uhid.h
@@ -25,6 +25,8 @@
enum uhid_event_type {
UHID_CREATE,
UHID_DESTROY,
+ UHID_START,
+ UHID_STOP,
UHID_INPUT,
};
--
1.7.10.4
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