From: Michael Grzeschik Date: Wed, 12 Sep 2012 11:58:00 +0000 (+0300) Subject: usb: chipidea: udc: fix setup of endpoint maxpacket size X-Git-Tag: v3.5.5~108 X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=9a3855f7b0b7e47bb77db5f1e1000c68ae549cc6;p=karo-tx-linux.git usb: chipidea: udc: fix setup of endpoint maxpacket size commit 7f67c38bdcb6d8bce02e10521fbf1618b586319f upstream. This patch changes the setup of the endpoint maxpacket size. All non control endpoints are initialized with an undefined ((unsigned short)~0) maxpacket size. The maxpacket size of Endpoint 0 will be kept at CTRL_PAYLOAD_MAX. Some gadget drivers check for the maxpacket size before they enable the endpoint, which leads to a wrong state in these drivers. Signed-off-by: Michael Grzeschik Acked-by: Felipe Balbi Signed-off-by: Marc Kleine-Budde Signed-off-by: Alexander Shishkin Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/usb/chipidea/udc.c b/drivers/usb/chipidea/udc.c index eaecfc41e7b0..001df4dbc814 100644 --- a/drivers/usb/chipidea/udc.c +++ b/drivers/usb/chipidea/udc.c @@ -1468,7 +1468,12 @@ static int init_eps(struct ci13xxx *udc) 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(udc->qh_pool, GFP_KERNEL, @@ -1488,6 +1493,7 @@ static int init_eps(struct ci13xxx *udc) else udc->ep0in = mEp; + mEp->ep.maxpacket = CTRL_PAYLOAD_MAX; continue; }