Make gr_ep_enable fail properly when a call requests a larger ep.maxpacket than
ep.maxpacket_limit.
Signed-off-by: Andreas Larsson <andreas@xxxxxxxxxxx>
---
Differences since v1: none
drivers/usb/gadget/gr_udc.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/usb/gadget/gr_udc.c b/drivers/usb/gadget/gr_udc.c
index 253e608..72458be 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);
--
1.7.10.4
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