Commit d693bbd4 authored by Neal Liu's avatar Neal Liu Committed by Greg Kroah-Hartman
Browse files

usb: aspeed-vhub: fix ep0 OUT ack received wrong length issue 



If multiple devices in vhub are enumerated simultaneously, ep0 OUT
ack might received wrong data length. Using expected data length
instead.

Acked-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: default avatarNeal Liu <neal_liu@aspeedtech.com>
Link: https://lore.kernel.org/r/20211208100545.1441397-4-neal_liu@aspeedtech.com


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 347f3f54

drivers/usb/gadget/udc/aspeed-vhub/ep0.c

+7 −0
Original line number Diff line number Diff line
@@ -251,6 +251,13 @@ static void ast_vhub_ep0_do_receive(struct ast_vhub_ep *ep, struct ast_vhub_req 
		len = remain;

		rc = -EOVERFLOW;

	}



	/* Hardware return wrong data len */

	if (len < ep->ep.maxpacket && len != remain) {

		EPDBG(ep, "using expected data len instead\n");

		len = remain;

	}



	if (len && req->req.buf)

		memcpy(req->req.buf + req->req.actual, ep->buf, len);

	req->req.actual += len;