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

29129a98 · Alan Ott <[email protected]> · 2010-06-30 09:50:36 -04:00

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 <[email protected]>
Signed-off-by: Jiri Kosina <[email protected]>

Commit: 29129a98e6fc892d63bf7b8efcb458a258fe1683
Parents: 1f45e324

Changes

1 files changed · +10 −3

File	Status	Add	Del	Content
drivers/hid/usbhid/hid-core.c	modified	+10	−3	View file

drivers/hid/usbhid/hid-core.c

View file

diff --git a/drivers/hid/usbhid/hid-core.c b/drivers/hid/usbhid/hid-core.c
index 1ebd324..b729c02 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++;
 	}
 