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=-9.9 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,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 ADB37C432C3 for ; Mon, 2 Dec 2019 20:31:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 784B12464F for ; Mon, 2 Dec 2019 20:31:52 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=ti.com header.i=@ti.com header.b="MOrDhfh9" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727605AbfLBUbv (ORCPT ); Mon, 2 Dec 2019 15:31:51 -0500 Received: from lelv0143.ext.ti.com ([198.47.23.248]:48646 "EHLO lelv0143.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727522AbfLBUbs (ORCPT ); Mon, 2 Dec 2019 15:31:48 -0500 Received: from lelv0265.itg.ti.com ([10.180.67.224]) by lelv0143.ext.ti.com (8.15.2/8.15.2) with ESMTP id xB2KVY1S116144; Mon, 2 Dec 2019 14:31:34 -0600 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1575318694; bh=I4zArTwz2+uyo5cLd8GOGGyuu7Ob1n/MUYmaFykEDf0=; h=From:To:CC:Subject:Date:In-Reply-To:References; b=MOrDhfh9Qab1FfK0q8D3QSJmCj8WSAEX4pWScE4+rTh0ADTkMuBdWERv1hbkfI2NN LVuwk5sQyE3eO3ffhdzP95BisKvguwfMq3lvOmrEtM/qFPFdCe14294GQwgU4oIglk 0GZArIFKa0b56G2vwJVniDgOk7zOjGxqu8jazy5U= Received: from DFLE109.ent.ti.com (dfle109.ent.ti.com [10.64.6.30]) by lelv0265.itg.ti.com (8.15.2/8.15.2) with ESMTPS id xB2KVYZZ116964 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Mon, 2 Dec 2019 14:31:34 -0600 Received: from DFLE107.ent.ti.com (10.64.6.28) by DFLE109.ent.ti.com (10.64.6.30) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1847.3; Mon, 2 Dec 2019 14:31:33 -0600 Received: from fllv0040.itg.ti.com (10.64.41.20) by DFLE107.ent.ti.com (10.64.6.28) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1847.3 via Frontend Transport; Mon, 2 Dec 2019 14:31:32 -0600 Received: from feketebors.ti.com (ileax41-snat.itg.ti.com [10.172.224.153]) by fllv0040.itg.ti.com (8.15.2/8.15.2) with ESMTP id xB2KVOPn106889; Mon, 2 Dec 2019 14:31:30 -0600 From: Peter Ujfalusi To: CC: , , , , , , , Subject: [PATCH 2/3] dmaengine: ti: k3-udma: Workaround for stale transfers Date: Mon, 2 Dec 2019 22:31:27 +0200 Message-ID: <20191202203128.14348-3-peter.ujfalusi@ti.com> X-Mailer: git-send-email 2.24.0 In-Reply-To: <20191202203128.14348-1-peter.ujfalusi@ti.com> References: <0191128105945.13071-1-peter.ujfalusi@ti.com> <20191202203128.14348-1-peter.ujfalusi@ti.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org If the client does issue_pending between terminte_all+synchronize and free_chan_resources, we need to make sure that it has been handled and cleared up. Signed-off-by: Peter Ujfalusi --- drivers/dma/ti/k3-udma.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/dma/ti/k3-udma.c b/drivers/dma/ti/k3-udma.c index 1b929f7a84d4..3aede5db9604 100644 --- a/drivers/dma/ti/k3-udma.c +++ b/drivers/dma/ti/k3-udma.c @@ -2842,6 +2842,10 @@ static void udma_free_chan_resources(struct dma_chan *chan) struct udma_dev *ud = to_udma_dev(chan->device); udma_terminate_all(chan); + if (uc->terminated_desc) { + udma_reset_chan(uc, false); + udma_reset_rings(uc); + } if (uc->irq_num_ring > 0) { free_irq(uc->irq_num_ring, uc); -- Peter Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki. Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki