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=-6.0 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT 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 48611C43381 for ; Mon, 1 Apr 2019 17:59:13 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 0D1E12084B for ; Mon, 1 Apr 2019 17:59:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1554141553; bh=hk9qZc9ScoNa154aFYHFblnRewOJP7e6Bxz6USbBByg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=OdPk1GXqdzi6su8iuIbJI6ntDoAlMk71lK4Na4WFGddIizCzON5rSUne3fOCIzChs kgSj0yi1pP9dBghw2uh3YvTIffKCGry01VGcl1AMBYDOmLFGXtVhI+geCLsv3xqrWb HhuUJoaWCIlyi9Q9N8w3MgkBh1pn1ee0QdZ2WelE= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731535AbfDAR7M (ORCPT ); Mon, 1 Apr 2019 13:59:12 -0400 Received: from mail.kernel.org ([198.145.29.99]:44846 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731304AbfDARSD (ORCPT ); Mon, 1 Apr 2019 13:18:03 -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 88205206C0; Mon, 1 Apr 2019 17:18:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1554139083; bh=hk9qZc9ScoNa154aFYHFblnRewOJP7e6Bxz6USbBByg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Pn+Koog6FzG9SiodsX4zc2k3wBju9sS45rdwuJtbDgXWyEhz3PiDzKBnE5wvBu0QV Thp0vQ4Lgfq/O4RhaF9Wcxj0gjmrqrTobIAc4V5KJDQKuwD1hY2D7ssz5k2ORLdSh7 /rJT92QDv1QAMeJOlEltJs95xCmZcMpJdhhL9EdQ= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Mathias Nyman Subject: [PATCH 4.19 107/134] xhci: Fix port resume done detection for SS ports with LPM enabled Date: Mon, 1 Apr 2019 19:02:23 +0200 Message-Id: <20190401170054.221630835@linuxfoundation.org> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190401170044.243719205@linuxfoundation.org> References: <20190401170044.243719205@linuxfoundation.org> User-Agent: quilt/0.65 X-stable: review X-Patchwork-Hint: ignore MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 4.19-stable review patch. If anyone has any objections, please let me know. ------------------ From: Mathias Nyman commit 6cbcf596934c8e16d6288c7cc62dfb7ad8eadf15 upstream. A suspended SS port in U3 link state will go to U0 when resumed, but can almost immediately after that enter U1 or U2 link power save states before host controller driver reads the port status. Host controller driver only checks for U0 state, and might miss the finished resume, leaving flags unclear and skip notifying usb code of the wake. Add U1 and U2 to the possible link states when checking for finished port resume. Cc: stable Signed-off-by: Mathias Nyman Signed-off-by: Greg Kroah-Hartman --- drivers/usb/host/xhci-ring.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) --- a/drivers/usb/host/xhci-ring.c +++ b/drivers/usb/host/xhci-ring.c @@ -1643,10 +1643,13 @@ static void handle_port_status(struct xh } } - if ((portsc & PORT_PLC) && (portsc & PORT_PLS_MASK) == XDEV_U0 && - DEV_SUPERSPEED_ANY(portsc)) { + if ((portsc & PORT_PLC) && + DEV_SUPERSPEED_ANY(portsc) && + ((portsc & PORT_PLS_MASK) == XDEV_U0 || + (portsc & PORT_PLS_MASK) == XDEV_U1 || + (portsc & PORT_PLS_MASK) == XDEV_U2)) { xhci_dbg(xhci, "resume SS port %d finished\n", port_id); - /* We've just brought the device into U0 through either the + /* We've just brought the device into U0/1/2 through either the * Resume state after a device remote wakeup, or through the * U3Exit state after a host-initiated resume. If it's a device * initiated remote wake, don't pass up the link state change,