linux-kernel - [PATCH 3.17 17/25] usb: gadget: f_fs: signedness bug in __ffs_func_bind_do

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Date:	Mon, 13 Oct 2014 04:25:10 +0200
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org, Michal Nazarewicz <mina86@...a86.com>,
	Dan Carpenter <dan.carpenter@...cle.com>,
	Felipe Balbi <balbi@...com>
Subject: [PATCH 3.17 17/25] usb: gadget: f_fs: signedness bug in __ffs_func_bind_do_descs()

3.17-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Dan Carpenter <dan.carpenter@...cle.com>

commit 85b06f5e53d17c15844ef3cd45d0c7107f0ae45c upstream.

We need "idx" to be signed for the error handling to work.

Fixes: 6d5c1c77bbf9 ('usb: gadget: f_fs: fix the redundant ep files problem')
Acked-by: Michal Nazarewicz <mina86@...a86.com>
Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>
Signed-off-by: Felipe Balbi <balbi@...com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/usb/gadget/function/f_fs.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

--- a/drivers/usb/gadget/function/f_fs.c
+++ b/drivers/usb/gadget/function/f_fs.c
@@ -2393,7 +2393,8 @@ static int __ffs_func_bind_do_descs(enum
 	struct usb_endpoint_descriptor *ds = (void *)desc;
 	struct ffs_function *func = priv;
 	struct ffs_ep *ffs_ep;
-	unsigned ep_desc_id, idx;
+	unsigned ep_desc_id;
+	int idx;
 	static const char *speed_names[] = { "full", "high", "super" };
 
 	if (type != FFS_DESCRIPTOR)


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