From 560f1187990c6c548756bf2f1183aa19d9c97413 Mon Sep 17 00:00:00 2001
From: Koen Beel <koen.beel@gmail.com>
Date: Wed, 30 May 2012 20:43:37 +0200
Subject: [PATCH] usb: gadget: ffs: add HID descriptor support.

When writing the descriptors to the ep0 file of functionfs, the HID descriptors where not recognized which caused the initialization from user space to fail.

Signed-off-by: Koen Beel <koen.beel@barco.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
---
 drivers/usb/gadget/f_fs.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/usb/gadget/f_fs.c b/drivers/usb/gadget/f_fs.c
index dcd1c7fbb01..8adc79d1b40 100644
--- a/drivers/usb/gadget/f_fs.c
+++ b/drivers/usb/gadget/f_fs.c
@@ -21,6 +21,7 @@
 #include <linux/blkdev.h>
 #include <linux/pagemap.h>
 #include <linux/export.h>
+#include <linux/hid.h>
 #include <asm/unaligned.h>
 
 #include <linux/usb/composite.h>
@@ -1671,6 +1672,12 @@ static int __must_check ffs_do_desc(char *data, unsigned len,
 	}
 		break;
 
+	case HID_DT_HID:
+		pr_vdebug("hid descriptor\n");
+		if (length != sizeof(struct hid_descriptor))
+			goto inv_length;
+		break;
+
 	case USB_DT_OTG:
 		if (length != sizeof(struct usb_otg_descriptor))
 			goto inv_length;