From patchwork Tue Jul 19 04:09:56 2011 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Aisheng Dong X-Patchwork-Id: 988172 Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) by demeter2.kernel.org (8.14.4/8.14.4) with ESMTP id p6J3irTB016465 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Tue, 19 Jul 2011 03:45:14 GMT Received: from canuck.infradead.org ([2001:4978:20e::1]) by merlin.infradead.org with esmtps (Exim 4.76 #1 (Red Hat Linux)) id 1Qj1Ee-00077c-Tl; Tue, 19 Jul 2011 03:44:41 +0000 Received: from localhost ([127.0.0.1] helo=canuck.infradead.org) by canuck.infradead.org with esmtp (Exim 4.76 #1 (Red Hat Linux)) id 1Qj1Ee-00042G-Hr; Tue, 19 Jul 2011 03:44:40 +0000 Received: from am1ehsobe001.messaging.microsoft.com ([213.199.154.204] helo=AM1EHSOBE001.bigfish.com) by canuck.infradead.org with esmtps (Exim 4.76 #1 (Red Hat Linux)) id 1Qj1Ea-00041y-RK for linux-arm-kernel@lists.infradead.org; Tue, 19 Jul 2011 03:44:37 +0000 Received: from mail21-am1-R.bigfish.com (10.3.201.241) by AM1EHSOBE001.bigfish.com (10.3.204.21) with Microsoft SMTP Server id 14.1.225.22; Tue, 19 Jul 2011 03:44:33 +0000 Received: from mail21-am1 (localhost.localdomain [127.0.0.1]) by mail21-am1-R.bigfish.com (Postfix) with ESMTP id 4E9482B025F; Tue, 19 Jul 2011 03:44:33 +0000 (UTC) X-SpamScore: 3 X-BigFish: VS3(zzzz1202h1082kzz8275bh8275dhz2dh2a8h668h839h61h) X-Spam-TCS-SCL: 0:0 X-Forefront-Antispam-Report: CIP:70.37.183.190; KIP:(null); UIP:(null); IPVD:NLI; H:mail.freescale.net; RD:none; EFVD:NLI Received: from mail21-am1 (localhost.localdomain [127.0.0.1]) by mail21-am1 (MessageSwitch) id 1311047073238437_17191; Tue, 19 Jul 2011 03:44:33 +0000 (UTC) Received: from AM1EHSMHS013.bigfish.com (unknown [10.3.201.242]) by mail21-am1.bigfish.com (Postfix) with ESMTP id 2C87017D804B; Tue, 19 Jul 2011 03:44:33 +0000 (UTC) Received: from mail.freescale.net (70.37.183.190) by AM1EHSMHS013.bigfish.com (10.3.207.151) with Microsoft SMTP Server (TLS) id 14.1.225.22; Tue, 19 Jul 2011 03:44:33 +0000 Received: from az33smr02.freescale.net (10.64.34.200) by 039-SN1MMR1-003.039d.mgd.msft.net (10.84.1.16) with Microsoft SMTP Server id 14.1.289.8; Mon, 18 Jul 2011 22:44:32 -0500 Received: from localhost.localdomain (shlinux2.ap.freescale.net [10.192.224.44]) by az33smr02.freescale.net (8.13.1/8.13.0) with ESMTP id p6J3iUcL027129; Mon, 18 Jul 2011 22:44:30 -0500 (CDT) From: Dong Aisheng To: Subject: [PATCH 1/1] ARM: mxs-dma: reset after disable channel Date: Tue, 19 Jul 2011 12:09:56 +0800 Message-ID: <1311048596-19932-1-git-send-email-b29396@freescale.com> X-Mailer: git-send-email 1.7.0.4 MIME-Version: 1.0 X-OriginatorOrg: freescale.com X-CRM114-Version: 20090807-BlameThorstenAndJenny ( TRE 0.7.6 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20110718_234437_020242_9041F4BA X-CRM114-Status: GOOD ( 13.43 ) X-Spam-Score: -0.7 (/) X-Spam-Report: SpamAssassin version 3.3.1 on canuck.infradead.org summary: Content analysis details: (-0.7 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.7 RCVD_IN_DNSWL_LOW RBL: Sender listed at http://www.dnswl.org/, low trust [213.199.154.204 listed in list.dnswl.org] Cc: vinod.koul@intel.com, shawn.guo@linaro.org X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: linux-arm-kernel-bounces@lists.infradead.org Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Greylist: IP, sender and recipient auto-whitelisted, not delayed by milter-greylist-4.2.6 (demeter2.kernel.org [140.211.167.43]); Tue, 19 Jul 2011 03:45:14 +0000 (UTC) We met some channels in abnormal state after disable. Reset it to get a clean state. Signed-off-by: Dong Aisheng Cc: Vinod Koul Cc: Shawn Guo Acked-by: Shawn Guo --- drivers/dma/mxs-dma.c | 1 + 1 files changed, 1 insertions(+), 0 deletions(-) diff --git a/drivers/dma/mxs-dma.c b/drivers/dma/mxs-dma.c index 88aad4f..5a24010 100644 --- a/drivers/dma/mxs-dma.c +++ b/drivers/dma/mxs-dma.c @@ -535,6 +535,7 @@ static int mxs_dma_control(struct dma_chan *chan, enum dma_ctrl_cmd cmd, switch (cmd) { case DMA_TERMINATE_ALL: mxs_dma_disable_chan(mxs_chan); + mxs_dma_reset_chan(mxs_chan); break; case DMA_PAUSE: mxs_dma_pause_chan(mxs_chan);