From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-15.7 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id E4845C433DF for ; Sun, 23 Aug 2020 15:12:58 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C0835206B5 for ; Sun, 23 Aug 2020 15:12:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1598195578; bh=K6d7EYRizb6q67hJOzX7aI58fuwaboJiuqPCDkYxAlU=; h=Subject:To:From:Date:List-ID:From; b=FG1F/SLqnarP5hVyrKFhhF+LI6g9FOxduk52UjLhwLEeZRsTXRRHRGKGMDpFbbU80 Ui2fDKrngKMxssxSvKA3AcoLMBhG8QIdL6eoYAl2uOz2PHuK1nBQj/ZeXgIzuLZilx rJczJGwPGuMMXp2dxx6LkA9EhC5bfBLxkS3VMY6Y= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727894AbgHWPM5 (ORCPT ); Sun, 23 Aug 2020 11:12:57 -0400 Received: from mail.kernel.org ([198.145.29.99]:36480 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726818AbgHWPMz (ORCPT ); Sun, 23 Aug 2020 11:12:55 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 6F1E4206B5; Sun, 23 Aug 2020 15:12:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1598195574; bh=K6d7EYRizb6q67hJOzX7aI58fuwaboJiuqPCDkYxAlU=; h=Subject:To:From:Date:From; b=Tfxk4/DARiq1x3AczZngi9I1FMN9D6ZU9PAcHTAdvEn2x9g2iC1zAmj3d5cr7c7aI XUx8InMrUMqa2T870yLleWnXgWjGpb6IxIWGsml+AjViFqrh+FU7/gbafe2UIvVHx1 MiWFe0YDXSIOqO2EAfRlG/9bmYOwUJSuG/terfUk= Subject: patch "xhci: Do warm-reset when both CAS and XDEV_RESUME are set" added to usb-linus To: kai.heng.feng@canonical.com, gregkh@linuxfoundation.org, mathias.nyman@linux.intel.com, stable@vger.kernel.org From: Date: Sun, 23 Aug 2020 17:13:06 +0200 Message-ID: <159819558691182@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org This is a note to let you know that I've just added the patch titled xhci: Do warm-reset when both CAS and XDEV_RESUME are set to my usb git tree which can be found at git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git in the usb-linus branch. The patch will show up in the next release of the linux-next tree (usually sometime within the next 24 hours during the week.) The patch will hopefully also be merged in Linus's tree for the next -rc kernel release. If you have any questions about this process, please let me know. >From 904df64a5f4d5ebd670801d869ca0a6d6a6e8df6 Mon Sep 17 00:00:00 2001 From: Kai-Heng Feng Date: Fri, 21 Aug 2020 12:15:48 +0300 Subject: xhci: Do warm-reset when both CAS and XDEV_RESUME are set Sometimes re-plugging a USB device during system sleep renders the device useless: [ 173.418345] xhci_hcd 0000:00:14.0: Get port status 2-4 read: 0x14203e2, return 0x10262 ... [ 176.496485] usb 2-4: Waited 2000ms for CONNECT [ 176.496781] usb usb2-port4: status 0000.0262 after resume, -19 [ 176.497103] usb 2-4: can't resume, status -19 [ 176.497438] usb usb2-port4: logical disconnect Because PLS equals to XDEV_RESUME, xHCI driver reports U3 to usbcore, despite of CAS bit is flagged. So proritize CAS over XDEV_RESUME to let usbcore handle warm-reset for the port. Cc: stable Signed-off-by: Kai-Heng Feng Signed-off-by: Mathias Nyman Link: https://lore.kernel.org/r/20200821091549.20556-3-mathias.nyman@linux.intel.com Signed-off-by: Greg Kroah-Hartman --- drivers/usb/host/xhci-hub.c | 19 ++++++++++--------- 1 file changed, 10 insertions(+), 9 deletions(-) diff --git a/drivers/usb/host/xhci-hub.c b/drivers/usb/host/xhci-hub.c index c3554e37e09f..4e14e164cb68 100644 --- a/drivers/usb/host/xhci-hub.c +++ b/drivers/usb/host/xhci-hub.c @@ -740,15 +740,6 @@ static void xhci_hub_report_usb3_link_state(struct xhci_hcd *xhci, { u32 pls = status_reg & PORT_PLS_MASK; - /* resume state is a xHCI internal state. - * Do not report it to usb core, instead, pretend to be U3, - * thus usb core knows it's not ready for transfer - */ - if (pls == XDEV_RESUME) { - *status |= USB_SS_PORT_LS_U3; - return; - } - /* When the CAS bit is set then warm reset * should be performed on port */ @@ -770,6 +761,16 @@ static void xhci_hub_report_usb3_link_state(struct xhci_hcd *xhci, */ pls |= USB_PORT_STAT_CONNECTION; } else { + /* + * Resume state is an xHCI internal state. Do not report it to + * usb core, instead, pretend to be U3, thus usb core knows + * it's not ready for transfer. + */ + if (pls == XDEV_RESUME) { + *status |= USB_SS_PORT_LS_U3; + return; + } + /* * If CAS bit isn't set but the Port is already at * Compliance Mode, fake a connection so the USB core -- 2.28.0