From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1946234Ab2I1V3t (ORCPT ); Fri, 28 Sep 2012 17:29:49 -0400 Received: from mail-pb0-f46.google.com ([209.85.160.46]:47839 "EHLO mail-pb0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1032681Ab2I1U2b (ORCPT ); Fri, 28 Sep 2012 16:28:31 -0400 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Greg Kroah-Hartman , alan@lxorguk.ukuu.org.uk, Klaus Falkner , Nicolas Ferre , Alan Stern Subject: [ 129/218] USB: ohci-at91: fix PIO handling in relation with number of ports Date: Fri, 28 Sep 2012 13:15:46 -0700 Message-Id: <20120928201516.280263091@linuxfoundation.org> X-Mailer: git-send-email 1.7.12.1.428.g652398a In-Reply-To: <20120928201501.208384923@linuxfoundation.org> References: <20120928201501.208384923@linuxfoundation.org> User-Agent: quilt/0.60-2.1.2 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 3.4-stable review patch. If anyone has any objections, please let me know. ------------------ From: Nicolas Ferre commit 6fffb77c8393151b0cf8cef1b9c2ba90587dd2e8 upstream. If the number of ports present on the SoC/board is not the maximum and that the platform data is not filled with all data, there is an easy way to mess the PIO setup for this interface. This quick fix addresses mis-configuration in USB host platform data that is common in at91 boards since commit 0ee6d1e (USB: ohci-at91: change maximum number of ports) that did not modified the associatd board files. Reported-by: Klaus Falkner Signed-off-by: Nicolas Ferre Acked-by: Alan Stern Signed-off-by: Greg Kroah-Hartman --- drivers/usb/host/ohci-at91.c | 10 ++++++++++ 1 file changed, 10 insertions(+) --- a/drivers/usb/host/ohci-at91.c +++ b/drivers/usb/host/ohci-at91.c @@ -569,6 +569,16 @@ static int __devinit ohci_hcd_at91_drv_p if (pdata) { at91_for_each_port(i) { + /* + * do not configure PIO if not in relation with + * real USB port on board + */ + if (i >= pdata->ports) { + pdata->vbus_pin[i] = -EINVAL; + pdata->overcurrent_pin[i] = -EINVAL; + break; + } + if (!gpio_is_valid(pdata->vbus_pin[i])) continue; gpio = pdata->vbus_pin[i];