From patchwork Thu Dec 19 11:54:15 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Luis Henriques X-Patchwork-Id: 303483 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from huckleberry.canonical.com (huckleberry.canonical.com [91.189.94.19]) by ozlabs.org (Postfix) with ESMTP id EF7A72C0084 for ; Thu, 19 Dec 2013 23:10:04 +1100 (EST) Received: from localhost ([127.0.0.1] helo=huckleberry.canonical.com) by huckleberry.canonical.com with esmtp (Exim 4.76) (envelope-from ) id 1VtcQS-0003vu-Ir; Thu, 19 Dec 2013 12:10:00 +0000 Received: from youngberry.canonical.com ([91.189.89.112]) by huckleberry.canonical.com with esmtp (Exim 4.76) (envelope-from ) id 1VtcFr-00078v-HR for kernel-team@lists.ubuntu.com; Thu, 19 Dec 2013 11:59:03 +0000 Received: from [188.250.212.249] (helo=localhost) by youngberry.canonical.com with esmtpsa (TLS1.0:DHE_RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1VtcFr-0006Et-3t; Thu, 19 Dec 2013 11:59:03 +0000 From: Luis Henriques To: linux-kernel@vger.kernel.org, stable@vger.kernel.org, kernel-team@lists.ubuntu.com Subject: [PATCH 3.11 157/208] usb: hub: Use correct reset for wedged USB3 devices that are NOTATTACHED Date: Thu, 19 Dec 2013 11:54:15 +0000 Message-Id: <1387454106-19326-158-git-send-email-luis.henriques@canonical.com> X-Mailer: git-send-email 1.8.3.2 In-Reply-To: <1387454106-19326-1-git-send-email-luis.henriques@canonical.com> References: <1387454106-19326-1-git-send-email-luis.henriques@canonical.com> X-Extended-Stable: 3.11 Cc: Julius Werner , Greg Kroah-Hartman X-BeenThere: kernel-team@lists.ubuntu.com X-Mailman-Version: 2.1.14 Precedence: list List-Id: Kernel team discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: kernel-team-bounces@lists.ubuntu.com Sender: kernel-team-bounces@lists.ubuntu.com 3.11.10.2 -stable review patch. If anyone has any objections, please let me know. ------------------ From: Julius Werner commit 2d51f3cd11f414c56a87dc018196b85fd50b04a4 upstream. This patch adds a check for USB_STATE_NOTATTACHED to the hub_port_warm_reset_required() workaround for ports that end up in Compliance Mode in hub_events() when trying to decide which reset function to use. Trying to call usb_reset_device() with a NOTATTACHED device will just fail and leave the port broken. Signed-off-by: Julius Werner Acked-by: Alan Stern Signed-off-by: Greg Kroah-Hartman Signed-off-by: Luis Henriques --- drivers/usb/core/hub.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c index 9ba5fcd4..8bbe1b8 100644 --- a/drivers/usb/core/hub.c +++ b/drivers/usb/core/hub.c @@ -4837,8 +4837,9 @@ static void hub_events(void) hub->ports[i - 1]->child; dev_dbg(hub_dev, "warm reset port %d\n", i); - if (!udev || !(portstatus & - USB_PORT_STAT_CONNECTION)) { + if (!udev || + !(portstatus & USB_PORT_STAT_CONNECTION) || + udev->state == USB_STATE_NOTATTACHED) { status = hub_port_reset(hub, i, NULL, HUB_BH_RESET_TIME, true);