linux-kernel - [PATCH] FunctionFS: add HID descriptor support.

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Date:	Wed, 30 May 2012 20:43:37 +0200
From:	Koen Beel <koen.beel@...il.com>
To:	balbi@...com, gregkh@...uxfoundation.org, mina86@...a86.com
Cc:	linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
	Koen Beel <koen.beel.barco@...il.com>,
	Koen Beel <koen.beel@...co.com>
Subject: [PATCH] FunctionFS: 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@...co.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 dcd1c7f..8adc79d 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;
-- 
1.7.9.5

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