| Message ID | 20210324141115.9384-2-fabian@ritter-vogt.de |
|---|---|
| State | New |
| Headers | show |
| Series | Fix the fotg210-udc driver | expand |
diff --git a/drivers/usb/gadget/udc/fotg210-udc.c b/drivers/usb/gadget/udc/fotg210-udc.c index 596fe26a7c56..482d867ac96f 100644 --- a/drivers/usb/gadget/udc/fotg210-udc.c +++ b/drivers/usb/gadget/udc/fotg210-udc.c @@ -346,7 +346,7 @@ static void fotg210_start_dma(struct fotg210_ep *ep, if (req->req.length - req->req.actual > ep->ep.maxpacket) length = ep->ep.maxpacket; else - length = req->req.length; + length = req->req.length - req->req.actual; } d = dma_map_single(dev, buffer, length,
For a 75 Byte request, it would send the first 64 separately, then detect that the remaining 11 Byte fit into a single DMA, but due to this bug set the length to the original 75 Bytes. This leads to a DMA failure (which is ignored...) and the request completes without the remaining bytes having been sent. Fixes: b84a8dee23fd ("usb: gadget: add Faraday fotg210_udc driver") Signed-off-by: Fabian Vogt <fabian@ritter-vogt.de> --- drivers/usb/gadget/udc/fotg210-udc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)