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

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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>
This commit is contained in:
Andreas Larsson 2014-03-27 16:15:58 +01:00 committed by Felipe Balbi
parent 5bddbd72c6
commit b38d27e552
1 changed files with 4 additions and 0 deletions
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4
drivers/usb/gadget/gr_udc.c
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@ -1542,6 +1542,10 @@ static int gr_ep_enable(struct usb_ep *_ep,
} else if (max == 0) { } else if (max == 0) {
dev_err(dev->dev, "Max payload cannot be set to 0\n"); dev_err(dev->dev, "Max payload cannot be set to 0\n");
return -EINVAL; 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); spin_lock(&ep->dev->lock);