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=-8.6 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_MUTT 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 2DCC8C04AAF for ; Tue, 21 May 2019 04:18:33 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 01A3920862 for ; Tue, 21 May 2019 04:18:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1558412313; bh=fZXYRkAeFGnA+NIcHyTm3OTAcMXVrInGSq8PaIKCbfU=; h=Date:From:To:Cc:Subject:References:In-Reply-To:List-ID:From; b=2GWwY21+9NwrvGE520azBP3ptMVc1tUjH2mG4ZOVG7+OQC7SVKPSFOv7wFjgeTo1r uMgtOHd+o+xtRS7tavWyAZV0uSYt3SaYYiY5imsXd6DQKGgjAARoR4c9u69MPs5i3k GUK1uLPEfuqsEomr8ycS8ccQHqooIS7xM5rvAmeo= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1725972AbfEUESc (ORCPT ); Tue, 21 May 2019 00:18:32 -0400 Received: from mail.kernel.org ([198.145.29.99]:39170 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725308AbfEUESc (ORCPT ); Tue, 21 May 2019 00:18:32 -0400 Received: from localhost (unknown [106.201.107.13]) (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 1DBFE2054F; Tue, 21 May 2019 04:18:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1558412311; bh=fZXYRkAeFGnA+NIcHyTm3OTAcMXVrInGSq8PaIKCbfU=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=gX6Ml98y6y0nRsMKLAHlU0I3dsJDEzjTVwyPtbbi3XRSvNeXbVqEiOUIm88LhtgJ9 sBZGVJZwG1HRd01ExEXA55n4aGYPZg6QQ8BS4JFT63ckZ3VRTz5URCjwpSuJU489ta gP9Ce2v5NGuNUcsmEWbptEeJnstmc+czndaqlrLo= Date: Tue, 21 May 2019 09:48:28 +0530 From: Vinod Koul To: Robin Gong Cc: "robh@kernel.org" , "broonie@kernel.org" , "shawnguo@kernel.org" , "s.hauer@pengutronix.de" , "festevam@gmail.com" , "mark.rutland@arm.com" , "u.kleine-koenig@pengutronix.de" , "plyatov@gmail.com" , "dan.j.williams@intel.com" , "catalin.marinas@arm.com" , "will.deacon@arm.com" , "l.stach@pengutronix.de" , dl-linux-imx , "linux-spi@vger.kernel.org" , "linux-arm-kernel@lists.infradead.org" , "linux-kernel@vger.kernel.org" , "dmaengine@vger.kernel.org" , "devicetree@vger.kernel.org" , "kernel@pengutronix.de" Subject: Re: [PATCH v3 11/14] dmaengine: imx-sdma: fix ecspi1 rx dma not work on i.mx8mm Message-ID: <20190521041828.GG15118@vkoul-mobl> References: <1557249513-4903-1-git-send-email-yibin.gong@nxp.com> <1557249513-4903-12-git-send-email-yibin.gong@nxp.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1557249513-4903-12-git-send-email-yibin.gong@nxp.com> User-Agent: Mutt/1.11.3 (2019-02-01) Sender: dmaengine-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: dmaengine@vger.kernel.org On 07-05-19, 09:16, Robin Gong wrote: > Because the number of ecspi1 rx event on i.mx8mm is 0, the condition > check ignore such special case without dma channel enabled, which caused > ecspi1 rx works failed. Actually, no need to check event_id0, checking > event_id1 is enough for DEV_2_DEV case because it's so lucky that event_id1 > never be 0. Well is that by chance or design that event_id1 will be never 0? > > Signed-off-by: Robin Gong > --- > drivers/dma/imx-sdma.c | 12 +++++------- > 1 file changed, 5 insertions(+), 7 deletions(-) > > diff --git a/drivers/dma/imx-sdma.c b/drivers/dma/imx-sdma.c > index a495c7f..86594fc 100644 > --- a/drivers/dma/imx-sdma.c > +++ b/drivers/dma/imx-sdma.c > @@ -1370,8 +1370,8 @@ static void sdma_free_chan_resources(struct dma_chan *chan) > > sdma_channel_synchronize(chan); > > - if (sdmac->event_id0) > - sdma_event_disable(sdmac, sdmac->event_id0); > + sdma_event_disable(sdmac, sdmac->event_id0); > + > if (sdmac->event_id1) > sdma_event_disable(sdmac, sdmac->event_id1); > > @@ -1670,11 +1670,9 @@ static int sdma_config(struct dma_chan *chan, > memcpy(&sdmac->slave_config, dmaengine_cfg, sizeof(*dmaengine_cfg)); > > /* Set ENBLn earlier to make sure dma request triggered after that */ > - if (sdmac->event_id0) { > - if (sdmac->event_id0 >= sdmac->sdma->drvdata->num_events) > - return -EINVAL; > - sdma_event_enable(sdmac, sdmac->event_id0); > - } > + if (sdmac->event_id0 >= sdmac->sdma->drvdata->num_events) > + return -EINVAL; > + sdma_event_enable(sdmac, sdmac->event_id0); > > if (sdmac->event_id1) { > if (sdmac->event_id1 >= sdmac->sdma->drvdata->num_events) > -- > 2.7.4 > -- ~Vinod