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usb: chipidea: udc: don't truncate requests to single tds

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It is not safe to truncate requests to the maximum possible size the
controller can handle with one td and to keep working. That patch fixes
that with proper error handling instead.

Reported-by: Felipe Balbi <[email protected]>
Signed-off-by: Michael Grzeschik <[email protected]>
Signed-off-by: Alexander Shishkin <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
This commit is contained in:
Michael Grzeschik 2013-03-30 12:54:08 +02:00 • committed by Greg Kroah-Hartman
commit 24dcade163
1 changed files with 2 additions and 2 deletions
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4
drivers/usb/chipidea/udc.c
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@ -1158,9 +1158,9 @@ static int ep_queue(struct usb_ep *ep, struct usb_request *req,
}
if (req->length > 4 * CI13XXX_PAGE_SIZE) {
req->length = 4 * CI13XXX_PAGE_SIZE;
retval = -EMSGSIZE;
dev_warn(mEp->ci->dev, "request length truncated\n");
dev_err(mEp->ci->dev, "request bigger than one td\n");
goto done;
}
/* push request */