From: Michael Grzeschik <m.grzeschik@xxxxxxxxxxxxxx> Non control endpoints have an undefined maxpacket size on udc start. Some gadget drivers check for the maxpacket size before they enable the endpoint, which leads to a wrong state. Signed-off-by: Michael Grzeschik <m.grzeschik@xxxxxxxxxxxxxx> Signed-off-by: Marc Kleine-Budde <mkl@xxxxxxxxxxxxxx> --- drivers/usb/chipidea/udc.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/drivers/usb/chipidea/udc.c b/drivers/usb/chipidea/udc.c index e4db7af..75a96ec 100644 --- a/drivers/usb/chipidea/udc.c +++ b/drivers/usb/chipidea/udc.c @@ -1455,7 +1455,12 @@ static int init_eps(struct ci13xxx *ci) mEp->ep.name = mEp->name; mEp->ep.ops = &usb_ep_ops; - mEp->ep.maxpacket = CTRL_PAYLOAD_MAX; + /* + * for ep0: maxP defined in desc, for other + * eps, maxP is set by epautoconfig() called + * by gadget layer + */ + mEp->ep.maxpacket = (unsigned short)~0; INIT_LIST_HEAD(&mEp->qh.queue); mEp->qh.ptr = dma_pool_alloc(ci->qh_pool, GFP_KERNEL, @@ -1475,6 +1480,7 @@ static int init_eps(struct ci13xxx *ci) else ci->ep0in = mEp; + mEp->ep.maxpacket = CTRL_PAYLOAD_MAX; continue; } -- 1.7.10.4 -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
