From: Greg KH <[email protected]> 3.5-stable review patch. If anyone has any objections, please let me know.
------------------ From: Michael Grzeschik <[email protected]> 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 <[email protected]> Acked-by: Felipe Balbi <[email protected]> Signed-off-by: Marc Kleine-Budde <[email protected]> Signed-off-by: Alexander Shishkin <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- drivers/usb/chipidea/udc.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) --- 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; } -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
