chipidea udc: ctrl traffic on endpoint 8

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Hi Peter,

we recently see a lot of warnings with the chipidea udc.
The driver is running as g_ether gadget.

cat drivers/usb/chipidea/udc.c
...

        if (i != 0) {
                dev_warn(ci->dev, "ctrl traffic at endpoint %d\n", i);
                continue;
        }
...


Do you know if this condition is correct anyway? It checks
for fifonumbers different to zero. As I know fifo zero is
ep0out. The core has the ep0in fifo on position 8, that
should also handle ctrl traffic IMHO.

Regards,
Michael

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