From patchwork Mon Apr 14 11:41:58 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Peter Ujfalusi X-Patchwork-Id: 3980291 X-Patchwork-Delegate: vinod.koul@intel.com Return-Path: X-Original-To: patchwork-dmaengine@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 5F2FB9F336 for ; Mon, 14 Apr 2014 11:59:42 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id A359A201F7 for ; Mon, 14 Apr 2014 11:59:41 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id CF256201ED for ; Mon, 14 Apr 2014 11:59:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754942AbaDNL6X (ORCPT ); Mon, 14 Apr 2014 07:58:23 -0400 Received: from comal.ext.ti.com ([198.47.26.152]:33087 "EHLO comal.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754077AbaDNLmk (ORCPT ); Mon, 14 Apr 2014 07:42:40 -0400 Received: from dlelxv90.itg.ti.com ([172.17.2.17]) by comal.ext.ti.com (8.13.7/8.13.7) with ESMTP id s3EBgJoq003098; Mon, 14 Apr 2014 06:42:19 -0500 Received: from DFLE73.ent.ti.com (dfle73.ent.ti.com [128.247.5.110]) by dlelxv90.itg.ti.com (8.14.3/8.13.8) with ESMTP id s3EBgJX8008002; Mon, 14 Apr 2014 06:42:19 -0500 Received: from dlep33.itg.ti.com (157.170.170.75) by DFLE73.ent.ti.com (128.247.5.110) with Microsoft SMTP Server id 14.3.174.1; Mon, 14 Apr 2014 06:42:18 -0500 Received: from dlep32.itg.ti.com (ileax41-snat.itg.ti.com [10.172.224.153]) by dlep33.itg.ti.com (8.14.3/8.13.8) with ESMTP id s3EBg6vj017924; Mon, 14 Apr 2014 06:42:16 -0500 From: Peter Ujfalusi To: , , , CC: , , , , Subject: [PATCH v3 03/10] dmaengine: edma: Correct the handling of src/dst_maxburst == 0 Date: Mon, 14 Apr 2014 14:41:58 +0300 Message-ID: <1397475725-5036-4-git-send-email-peter.ujfalusi@ti.com> X-Mailer: git-send-email 1.9.2 In-Reply-To: <1397475725-5036-1-git-send-email-peter.ujfalusi@ti.com> References: <1397475725-5036-1-git-send-email-peter.ujfalusi@ti.com> MIME-Version: 1.0 Sender: dmaengine-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: dmaengine@vger.kernel.org X-Spam-Status: No, score=-7.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP When clients asks for maxburst = 0 it is basically the same case as if they were asking for maxburst = 1 since in both case ASYNC need to be used and the eDMA is expected to write/read one word per DMA request. Signed-off-by: Peter Ujfalusi Acked-by: Joel Fernandes --- drivers/dma/edma.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/dma/edma.c b/drivers/dma/edma.c index cd04eb7b182e..2742867fd1e6 100644 --- a/drivers/dma/edma.c +++ b/drivers/dma/edma.c @@ -285,6 +285,10 @@ static int edma_config_pset(struct dma_chan *chan, struct edmacc_param *pset, int absync; acnt = dev_width; + + /* src/dst_maxburst == 0 is the same case as src/dst_maxburst == 1 */ + if (!burst) + burst = 1; /* * If the maxburst is equal to the fifo width, use * A-synced transfers. This allows for large contiguous