From patchwork Tue Jul 2 08:01:27 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg Kroah-Hartman X-Patchwork-Id: 11027433 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 756EC14C0 for ; Tue, 2 Jul 2019 08:08:13 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 60DBC28641 for ; Tue, 2 Jul 2019 08:08:13 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 5257D28849; Tue, 2 Jul 2019 08:08:13 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id E7F8428641 for ; Tue, 2 Jul 2019 08:08:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728380AbfGBIIL (ORCPT ); Tue, 2 Jul 2019 04:08:11 -0400 Received: from mail.kernel.org ([198.145.29.99]:55640 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728373AbfGBIIJ (ORCPT ); Tue, 2 Jul 2019 04:08:09 -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 5E10B206A2; Tue, 2 Jul 2019 08:08:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1562054888; bh=dBd5Gi/aU9o+YoIteL3TsGFh0gBXpK4pcIblhu743gU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=kVgj0T0IXwcdw7XUjrjiwwB20P33kuwPEnH0Ib0VRyROoMukTYYUKy41xtWFNtejA 7BUz/WbgkIkEi5ys2p8AVFcZfN2cwZ/G0dHQvkVcDI0nEp03r9Zbpt9PJ+/wKMnHUr eDhHkNp5aQ3hGTbgxHo0Wf1lJKiHoR9GOU/IjNeY= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Fei Yang , Sam Protsenko , Felipe Balbi , linux-usb@vger.kernel.org, Felipe Balbi , John Stultz , Sasha Levin Subject: [PATCH 4.19 26/72] usb: dwc3: gadget: use num_trbs when skipping TRBs on ->dequeue() Date: Tue, 2 Jul 2019 10:01:27 +0200 Message-Id: <20190702080126.031346654@linuxfoundation.org> X-Mailer: git-send-email 2.22.0 In-Reply-To: <20190702080124.564652899@linuxfoundation.org> References: <20190702080124.564652899@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Sender: linux-usb-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP commit c3acd59014148470dc58519870fbc779785b4bf7 upstream Now that we track how many TRBs a request uses, it's easier to skip over them in case of a call to usb_ep_dequeue(). Let's do so and simplify the code a bit. Cc: Fei Yang Cc: Sam Protsenko Cc: Felipe Balbi Cc: linux-usb@vger.kernel.org Cc: stable@vger.kernel.org # 4.19.y Signed-off-by: Felipe Balbi (cherry picked from commit c3acd59014148470dc58519870fbc779785b4bf7) Signed-off-by: John Stultz Signed-off-by: Sasha Levin --- drivers/usb/dwc3/gadget.c | 28 ++++------------------------ 1 file changed, 4 insertions(+), 24 deletions(-) diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index fd91c494307c..4e08904890ed 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -1368,6 +1368,8 @@ static int dwc3_gadget_ep_dequeue(struct usb_ep *ep, break; } if (r == req) { + int i; + /* wait until it is processed */ dwc3_stop_active_transfer(dep, true); @@ -1405,32 +1407,12 @@ static int dwc3_gadget_ep_dequeue(struct usb_ep *ep, if (!r->trb) goto out0; - if (r->num_pending_sgs) { + for (i = 0; i < r->num_trbs; i++) { struct dwc3_trb *trb; - int i = 0; - - for (i = 0; i < r->num_pending_sgs; i++) { - trb = r->trb + i; - trb->ctrl &= ~DWC3_TRB_CTRL_HWO; - dwc3_ep_inc_deq(dep); - } - - if (r->needs_extra_trb) { - trb = r->trb + r->num_pending_sgs + 1; - trb->ctrl &= ~DWC3_TRB_CTRL_HWO; - dwc3_ep_inc_deq(dep); - } - } else { - struct dwc3_trb *trb = r->trb; + trb = r->trb + i; trb->ctrl &= ~DWC3_TRB_CTRL_HWO; dwc3_ep_inc_deq(dep); - - if (r->needs_extra_trb) { - trb = r->trb + 1; - trb->ctrl &= ~DWC3_TRB_CTRL_HWO; - dwc3_ep_inc_deq(dep); - } } goto out1; } @@ -1441,8 +1423,6 @@ static int dwc3_gadget_ep_dequeue(struct usb_ep *ep, } out1: - /* giveback the request */ - dwc3_gadget_giveback(dep, req, -ECONNRESET); out0: