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fotg210-udc: Complete OUT requests on short packets

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[ Upstream commit 75bb93be0027123b5db6cbcce89eb62f0f6b3c5b ]

A short packet indicates the end of a transfer and marks the request as
complete.

Fixes: b84a8dee23fd ("usb: gadget: add Faraday fotg210_udc driver")
Signed-off-by: Fabian Vogt <fabian@ritter-vogt.de>
Link: https://lore.kernel.org/r/20210324141115.9384-8-fabian@ritter-vogt.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Fabian Vogt 2021-03-24 15:11:15 +01:00 committed by Greg Kroah-Hartman
parent 4028f50666
commit 8e3f1894b8
1 changed files with 6 additions and 2 deletions
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8
drivers/usb/gadget/udc/fotg210-udc.c
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@ -856,12 +856,16 @@ static void fotg210_out_fifo_handler(struct fotg210_ep *ep)
{
struct fotg210_request *req = list_entry(ep->queue.next,
struct fotg210_request, queue);
int disgr1 = ioread32(ep->fotg210->reg + FOTG210_DISGR1);
fotg210_start_dma(ep, req);
/* finish out transfer */
/* Complete the request when it's full or a short packet arrived.
* Like other drivers, short_not_ok isn't handled.
*/
if (req->req.length == req->req.actual ||
req->req.actual < ep->ep.maxpacket)
(disgr1 & DISGR1_SPK_INT(ep->epnum - 1)))
fotg210_done(ep, req, 0);
}