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=-14.8 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, URIBL_BLOCKED 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 649D5C433E1 for ; Wed, 19 Aug 2020 12:09:49 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 29524206DA for ; Wed, 19 Aug 2020 12:09:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1597838989; bh=7K4kEEM3bu5U8kA7A230Y5dCJGUmUv1dpflrKM6x3dU=; h=Subject:To:From:Date:List-ID:From; b=LkzazK71y94MXBF7t4ZnL9zx0sXf5OSGwajwThb4u2dy1ohSRcGy8Mn1cnwKpUdHy 266lhzwYQhSa+IaYwWa+Iox0ujK6vm8mhFXhkRgeHmnbWiupVuDBQk60eSZSouLMka rf+cEMgsRdOWWlSHRZ/zhu8NMKqESBz8xAiWXI9E= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728215AbgHSMJs (ORCPT ); Wed, 19 Aug 2020 08:09:48 -0400 Received: from mail.kernel.org ([198.145.29.99]:47492 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728122AbgHSMJm (ORCPT ); Wed, 19 Aug 2020 08:09:42 -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 9F3C1205CB; Wed, 19 Aug 2020 12:09:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1597838981; bh=7K4kEEM3bu5U8kA7A230Y5dCJGUmUv1dpflrKM6x3dU=; h=Subject:To:From:Date:From; b=Jntep9mehcIRDIf3/gPnTJeRL2XbXLaj/zeGzUfRkR4ikpgUYanK38JQ+ALSZIWnm VEkwujd2TN32rO+zcin0MedPR1C7Uj6rV6q7oO51wWldaANNt10Oge5eOx6GQuUZ0W doIJ0x8TbMwPN7tDtcTywVPoaIDqcrkUSsr4tLyo= Subject: patch "usb: dwc3: gadget: Fix handling ZLP" added to usb-linus To: Thinh.Nguyen@synopsys.com, balbi@kernel.org, stable@vger.kernel.org, thinhn@synopsys.com From: Date: Wed, 19 Aug 2020 14:09:55 +0200 Message-ID: <159783899515046@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 usb: dwc3: gadget: Fix handling ZLP 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 d2ee3ff79e6a3d4105e684021017d100524dc560 Mon Sep 17 00:00:00 2001 From: Thinh Nguyen Date: Thu, 6 Aug 2020 19:46:29 -0700 Subject: usb: dwc3: gadget: Fix handling ZLP The usb_request->zero doesn't apply for isoc. Also, if we prepare a 0-length (ZLP) TRB for the OUT direction, we need to prepare an extra TRB to pad up to the MPS alignment. Use the same bounce buffer for the ZLP TRB and the extra pad TRB. Cc: # v4.5+ Fixes: d6e5a549cc4d ("usb: dwc3: simplify ZLP handling") Fixes: 04c03d10e507 ("usb: dwc3: gadget: handle request->zero") Signed-off-by: Thinh Nguyen Signed-off-by: Felipe Balbi --- drivers/usb/dwc3/gadget.c | 25 +++++++++++++++++++++++-- 1 file changed, 23 insertions(+), 2 deletions(-) diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index f9231253cbed..df603a817a98 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -1199,6 +1199,7 @@ static void dwc3_prepare_one_trb_linear(struct dwc3_ep *dep, req->request.no_interrupt, req->request.is_last); } else if (req->request.zero && req->request.length && + !usb_endpoint_xfer_isoc(dep->endpoint.desc) && (IS_ALIGNED(req->request.length, maxp))) { struct dwc3 *dwc = dep->dwc; struct dwc3_trb *trb; @@ -1208,14 +1209,25 @@ static void dwc3_prepare_one_trb_linear(struct dwc3_ep *dep, /* prepare normal TRB */ dwc3_prepare_one_trb(dep, req, length, true, 0); - /* Now prepare one extra TRB to handle ZLP */ + /* Prepare one extra TRB to handle ZLP */ trb = &dep->trb_pool[dep->trb_enqueue]; req->num_trbs++; __dwc3_prepare_one_trb(dep, trb, dwc->bounce_addr, 0, - false, 1, req->request.stream_id, + !req->direction, 1, req->request.stream_id, req->request.short_not_ok, req->request.no_interrupt, req->request.is_last); + + /* Prepare one more TRB to handle MPS alignment for OUT */ + if (!req->direction) { + trb = &dep->trb_pool[dep->trb_enqueue]; + req->num_trbs++; + __dwc3_prepare_one_trb(dep, trb, dwc->bounce_addr, maxp, + false, 1, req->request.stream_id, + req->request.short_not_ok, + req->request.no_interrupt, + req->request.is_last); + } } else { dwc3_prepare_one_trb(dep, req, length, false, 0); } @@ -2690,8 +2702,17 @@ static int dwc3_gadget_ep_cleanup_completed_request(struct dwc3_ep *dep, status); if (req->needs_extra_trb) { + unsigned int maxp = usb_endpoint_maxp(dep->endpoint.desc); + ret = dwc3_gadget_ep_reclaim_trb_linear(dep, req, event, status); + + /* Reclaim MPS padding TRB for ZLP */ + if (!req->direction && req->request.zero && req->request.length && + !usb_endpoint_xfer_isoc(dep->endpoint.desc) && + (IS_ALIGNED(req->request.length, maxp))) + ret = dwc3_gadget_ep_reclaim_trb_linear(dep, req, event, status); + req->needs_extra_trb = false; } -- 2.28.0