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usb: gadget: gr_udc: Fix check for invalid number of microframes 

The value 0x3 (not 0x11) in the field for additional transaction/microframe
is reserved and should not be let through. Be clear in the error message about
what value caused the error return.

Reported-by: David Binderman <dcb314@hotmail.com>
Signed-off-by: Andreas Larsson <andreas@gaisler.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
This commit is contained in:
Andreas Larsson 2014-06-26 13:07:48 +02:00 committed by Felipe Balbi
parent 7adb5c876e
commit 6ee96cc000
1 changed files with 3 additions and 2 deletions
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5
drivers/usb/gadget/gr_udc.c
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@ -1532,8 +1532,9 @@ static int gr_ep_enable(struct usb_ep *_ep,
"%s mode: multiple trans./microframe not valid\n",
(mode == 2 ? "Bulk" : "Control"));
return -EINVAL;
} else if (nt == 0x11) {
dev_err(dev->dev, "Invalid value for trans./microframe\n");
} else if (nt == 0x3) {
dev_err(dev->dev,
"Invalid value 0x3 for additional trans./microframe\n");
return -EINVAL;
} else if ((nt + 1) * max > buffer_size) {
dev_err(dev->dev, "Hw buffer size %d < max payload %d * %d\n",