From 7b1b44ea74c7d936bac1509cbe0a4637c7635f94 Mon Sep 17 00:00:00 2001
From: anarkia1976 <stefano.villa1976@gmail.com>
Date: Mon, 29 Jun 2015 16:41:07 +0200
Subject: [PATCH] drivers: usb: keyboard/mouse: Added Boot mode patch

---
 drivers/usb/gadget/f_hid.c | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/drivers/usb/gadget/f_hid.c b/drivers/usb/gadget/f_hid.c
index fa52b72..4b49e6e 100644
--- a/drivers/usb/gadget/f_hid.c
+++ b/drivers/usb/gadget/f_hid.c
@@ -403,7 +403,12 @@ static int hidg_setup(struct usb_function *f,
 	case ((USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8
 		  | HID_REQ_GET_PROTOCOL):
 		VDBG(cdev, "get_protocol\n");
-		goto stall;
+		length = min_t(unsigned, length, 1);
+		if (hidg->bInterfaceSubClass == USB_INTERFACE_SUBCLASS_BOOT)
+			((u8 *) req->buf)[0] = 0;	/* Boot protocol */
+		else
+			((u8 *) req->buf)[0] = 1;	/* Report protocol */
+		goto respond;
 		break;
 
 	case ((USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8
@@ -417,6 +422,14 @@ static int hidg_setup(struct usb_function *f,
 	case ((USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8
 		  | HID_REQ_SET_PROTOCOL):
 		VDBG(cdev, "set_protocol\n");
+		length = 0;
+		if (hidg->bInterfaceSubClass == USB_INTERFACE_SUBCLASS_BOOT) {
+			if (value == 0)		/* Boot protocol */
+				goto respond;
+		} else {
+			if (value == 1)		/* Report protocol */
+				goto respond;
+		}
 		goto stall;
 		break;