From patchwork Thu Jun 24 07:02:05 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Minas Harutyunyan X-Patchwork-Id: 12341151 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,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,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 6B1FCC48BDF for ; Thu, 24 Jun 2021 07:02:11 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 49E616102A for ; Thu, 24 Jun 2021 07:02:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231321AbhFXHE3 (ORCPT ); Thu, 24 Jun 2021 03:04:29 -0400 Received: from smtprelay-out1.synopsys.com ([149.117.87.133]:43304 "EHLO smtprelay-out1.synopsys.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229454AbhFXHE2 (ORCPT ); Thu, 24 Jun 2021 03:04:28 -0400 Received: from mailhost.synopsys.com (mdc-mailhost1.synopsys.com [10.225.0.209]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) (Client CN "mailhost.synopsys.com", Issuer "SNPSica2" (verified OK)) by smtprelay-out1.synopsys.com (Postfix) with ESMTPS id E2ABBC0B39; Thu, 24 Jun 2021 07:02:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=synopsys.com; s=mail; t=1624518130; bh=3IaNpKsXs8zGMv44mhIIHI2F9/SqWHCi+gnKaoegfHw=; h=Date:From:Subject:To:Cc:From; b=gOJ3HmjiCxpf8YsEM06vqAoRXmwOVNWW09UyGVNubW1zLd9uovlBUUsyziZxMV5cO k8NIXX+lVk+rPAkGaOn6hhCjySFRKb4HOgsxSp3gW4gLsLhosMQhVhjhib1LzsIvVh bDpxgzBA1/tjy7yIUO3gYha4sKsmPZRuJ7xJflgJ4XwGgOY4jGO8EFbzacNH8ehL24 UNxxheucBLsm55gRfbRtDROzWuT2aXZAM1ZQ1XpTuK+RZp4+GDYdK7YjbPgnelVDpL udxmzbq9tXUEQP6M839DEv36TCYLKbBfRjQnu2mKmQuSjwwC1GhTq4USpsVuQnk+G9 ITy3HjCnj15SQ== Received: from Armenia_lab (armenia_lab.internal.synopsys.com [10.116.75.26]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client did not present a certificate) by mailhost.synopsys.com (Postfix) with ESMTPSA id D6BA7A005C; Thu, 24 Jun 2021 07:02:06 +0000 (UTC) Received: by Armenia_lab (sSMTP sendmail emulation); Thu, 24 Jun 2021 00:02:05 -0700 Date: Thu, 24 Jun 2021 00:02:05 -0700 Message-Id: <84d3432b0331ea5f612eb10ad1c03ba89cc4d5a2.1624517653.git.Minas.Harutyunyan@synopsys.com> X-SNPS-Relay: synopsys.com From: Minas Harutyunyan Subject: [PATCH] usb: dwc2: gadget: Fix sending zero length packet in DDMA mode. To: linux-usb@vger.kernel.org Cc: John.Youn@synopsys.com, balbi@kernel.org, yousaf.kaukab@intel.com Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org Sending zero length packet in DDMA mode perform by DMA descriptor by setting SP (short packet) flag. For DDMA in function dwc2_hsotg_complete_in() does not need to send zlp. Tested by USBCV MSC tests. Fixes: f71b5e2533de ("usb: dwc2: gadget: fix zero length packet transfers") Signed-off-by: Minas Harutyunyan --- drivers/usb/dwc2/gadget.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) base-commit: 00a738b86ec0c88ad4745f658966f951cbe4c885 diff --git a/drivers/usb/dwc2/gadget.c b/drivers/usb/dwc2/gadget.c index c581ee41ac81..f467db1747d6 100644 --- a/drivers/usb/dwc2/gadget.c +++ b/drivers/usb/dwc2/gadget.c @@ -2749,9 +2749,11 @@ static void dwc2_hsotg_complete_in(struct dwc2_hsotg *hsotg, return; } - /* Zlp for all endpoints, for ep0 only in DATA IN stage */ + /* Zlp for all endpoints in non_DDMA, for ep0 only in DATA IN stage */ if (hs_ep->send_zlp) { - dwc2_hsotg_program_zlp(hsotg, hs_ep); + if (!using_desc_dma(hsotg)) + dwc2_hsotg_program_zlp(hsotg, hs_ep); + hs_ep->send_zlp = 0; /* transfer will be completed on next complete interrupt */ return;