From: Andreas Larsson <andreas@gaisler.com>
Date: Thu, 27 Mar 2014 15:15:58 +0000 (+0100)
Subject: usb: gadget: gr_udc: Return error code when trying to set ep.maxpacket > ep.maxpacket... 
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=b38d27e5527c33a2a1f5bb3aee39b755e57dea86;p=linux-beck.git

usb: gadget: gr_udc: Return error code when trying to set ep.maxpacket > ep.maxpacket_limit

Make gr_ep_enable fail properly when a call requests a larger ep.maxpacket than
ep.maxpacket_limit.

Signed-off-by: Andreas Larsson <andreas@gaisler.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
---

diff --git a/drivers/usb/gadget/gr_udc.c b/drivers/usb/gadget/gr_udc.c
index 253e608b57f9..72458be7763a 100644
--- a/drivers/usb/gadget/gr_udc.c
+++ b/drivers/usb/gadget/gr_udc.c
@@ -1542,6 +1542,10 @@ static int gr_ep_enable(struct usb_ep *_ep,
 	} else if (max == 0) {
 		dev_err(dev->dev, "Max payload cannot be set to 0\n");
 		return -EINVAL;
+	} else if (max > ep->ep.maxpacket_limit) {
+		dev_err(dev->dev, "Requested max payload %d > limit %d\n",
+			max, ep->ep.maxpacket_limit);
+		return -EINVAL;
 	}
 
 	spin_lock(&ep->dev->lock);