HID: Send Report ID when numbered reports are sent over the control endpoint.

The Report ID wasn't sent as part of the payload for reports which were sent
over the control endpoint. This is required by section 8.1 of the HID spec.

Signed-off-by: Alan Ott <alan@signal11.us>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

1 files changed, 10 insertions, 3 deletions

diff --git a/drivers/hid/usbhid/hid-core.c b/drivers/hid/usbhid/hid-core.c
index 1ebd3244eb85..b729c0286679 100644
--- a/drivers/hid/usbhid/hid-core.c
+++ b/drivers/hid/usbhid/hid-core.c
@@ -827,14 +827,21 @@ static int usbhid_output_raw_report(struct hid_device *hid, __u8 *buf, size_t co
                                 ret++;
                 }
         } else {
+                int skipped_report_id = 0;
+                if (buf[0] == 0x0) {
+                        /* Don't send the Report ID */
+                        buf++;
+                        count--;
+                        skipped_report_id = 1;
+                }
                 ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
                         HID_REQ_SET_REPORT,
                         USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
                         ((report_type + 1) << 8) | *buf,
-                        interface->desc.bInterfaceNumber, buf + 1, count - 1,
+                        interface->desc.bInterfaceNumber, buf, count,
                         USB_CTRL_SET_TIMEOUT);
-                /* count also the report id */
-                if (ret > 0)
+                /* count also the report id, if this was a numbered report. */
+                if (ret > 0 && skipped_report_id)
                         ret++;
         }