From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758110Ab2DXWgc (ORCPT ); Tue, 24 Apr 2012 18:36:32 -0400 Received: from mail-pz0-f51.google.com ([209.85.210.51]:49931 "EHLO mail-pz0-f51.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758095Ab2DXWg2 (ORCPT ); Tue, 24 Apr 2012 18:36:28 -0400 Message-Id: <20120424223245.581203740@linuxfoundation.org> User-Agent: quilt/0.60-19.1 Date: Tue, 24 Apr 2012 15:33:23 -0700 From: Greg KH To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: torvalds@linux-foundation.org, akpm@linux-foundation.org, alan@lxorguk.ukuu.org.uk, Felipe Balbi Subject: [ 42/62] usb: gadget: udc-core: stop UDC on device-initiated disconnect In-Reply-To: <20120424223305.GA7748@kroah.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 3.3-stable review patch. If anyone has any objections, please let me know. ------------------ From: Felipe Balbi commit 6d258a4c42089229b855fd706622029decf316d6 upstream. When we want to do device-initiated disconnect, let's make sure we stop the UDC in order to e.g. allow lower power states to be achieved by turning off unnecessary clocks and/or stoping PHYs. When reconnecting, call ->udc_start() again to make sure UDC is reinitialized. Signed-off-by: Felipe Balbi Signed-off-by: Greg Kroah-Hartman --- drivers/usb/gadget/udc-core.c | 4 ++++ 1 file changed, 4 insertions(+) --- a/drivers/usb/gadget/udc-core.c +++ b/drivers/usb/gadget/udc-core.c @@ -359,8 +359,12 @@ static ssize_t usb_udc_softconn_store(st struct usb_udc *udc = container_of(dev, struct usb_udc, dev); if (sysfs_streq(buf, "connect")) { + if (udc_is_newstyle(udc)) + usb_gadget_udc_start(udc->gadget, udc->driver); usb_gadget_connect(udc->gadget); } else if (sysfs_streq(buf, "disconnect")) { + if (udc_is_newstyle(udc)) + usb_gadget_udc_stop(udc->gadget, udc->driver); usb_gadget_disconnect(udc->gadget); } else { dev_err(dev, "unsupported command '%s'\n", buf);