From patchwork Fri May 1 13:22:30 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 226538 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=-6.8 required=3.0 tests=DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable 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 50F59C47254 for ; Fri, 1 May 2020 13:53:40 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 28FE02054F for ; Fri, 1 May 2020 13:53:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1588341220; bh=WM6Psp5MWsVb3j3Aezr/CMsEltwqmJ+7sheXVHai2yI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=yPGOvC+X0uCQh7u9MKvRq4lN4d1yUx6VxtXMDj8+StNQX7Ekabw4Q0XrJVKvmhrEU GIAg9hzBTrTeuAwxa/1Bj+OzSvem3SOYdiwbsqMh2um77qKBbzO1BqImzzyWFR5AP2 ZHDh5qNPWjEr9rh2BuzVyObqlQzxkPw6cy9logag= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729773AbgEANgC (ORCPT ); Fri, 1 May 2020 09:36:02 -0400 Received: from mail.kernel.org ([198.145.29.99]:34404 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730327AbgEANgB (ORCPT ); Fri, 1 May 2020 09:36:01 -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 98317216FD; Fri, 1 May 2020 13:36:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1588340161; bh=WM6Psp5MWsVb3j3Aezr/CMsEltwqmJ+7sheXVHai2yI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Hierap/HkwRAZiaqCbcTh+iZjJ+OuOoZuSmkSz0MrINS09FSBEhNRFOiJsZSRdLyn sEftq9aK63o+kbrxF6eR313XCmmfYYEbubaHQxaRtpSbwegZSXxZ18D9mrQsy/CQiY VG5sdMd7Fo5o7StTAzUwjJ+InD0EiFobnlobZSvs= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Thinh Nguyen , Felipe Balbi Subject: [PATCH 4.19 05/46] usb: dwc3: gadget: Do link recovery for SS and SSP Date: Fri, 1 May 2020 15:22:30 +0200 Message-Id: <20200501131501.161306362@linuxfoundation.org> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20200501131457.023036302@linuxfoundation.org> References: <20200501131457.023036302@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Thinh Nguyen commit d0550cd20e52558ecf6847a0f96ebd5d944c17e4 upstream. The controller always supports link recovery for device in SS and SSP. Remove the speed limit check. Also, when the device is in RESUME or RESET state, it means the controller received the resume/reset request. The driver must send the link recovery to acknowledge the request. They are valid states for the driver to send link recovery. Fixes: 72246da40f37 ("usb: Introduce DesignWare USB3 DRD Driver") Fixes: ee5cd41c9117 ("usb: dwc3: Update speed checks for SuperSpeedPlus") Signed-off-by: Thinh Nguyen Signed-off-by: Felipe Balbi Signed-off-by: Greg Kroah-Hartman --- drivers/usb/dwc3/gadget.c | 8 ++------ 1 file changed, 2 insertions(+), 6 deletions(-) --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -1577,7 +1577,6 @@ static int __dwc3_gadget_wakeup(struct d u32 reg; u8 link_state; - u8 speed; /* * According to the Databook Remote wakeup request should @@ -1587,16 +1586,13 @@ static int __dwc3_gadget_wakeup(struct d */ reg = dwc3_readl(dwc->regs, DWC3_DSTS); - speed = reg & DWC3_DSTS_CONNECTSPD; - if ((speed == DWC3_DSTS_SUPERSPEED) || - (speed == DWC3_DSTS_SUPERSPEED_PLUS)) - return 0; - link_state = DWC3_DSTS_USBLNKST(reg); switch (link_state) { + case DWC3_LINK_STATE_RESET: case DWC3_LINK_STATE_RX_DET: /* in HS, means Early Suspend */ case DWC3_LINK_STATE_U3: /* in HS, means SUSPEND */ + case DWC3_LINK_STATE_RESUME: break; default: return -EINVAL;