From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753855AbbJTJrR (ORCPT ); Tue, 20 Oct 2015 05:47:17 -0400 Received: from smtp-out-200.synserver.de ([212.40.185.200]:1161 "EHLO smtp-out-188.synserver.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S932078AbbJTJqp (ORCPT ); Tue, 20 Oct 2015 05:46:45 -0400 X-SynServer-TrustedSrc: 1 X-SynServer-AuthUser: lars@metafoo.de X-SynServer-PPID: 2410 From: Lars-Peter Clausen To: Vinod Koul , Takashi Iwai Cc: Dan Williams , Russell King , Laurent Pinchart , Kuninori Morimoto , Qiao Zhou , Shengjiu Wang , Matt Campbell , Jonah Petri , dmaengine@vger.kernel.org, alsa-devel@alsa-project.org, linux-kernel@vger.kernel.org, Lars-Peter Clausen Subject: [PATCH 3/4] dmaengine: axi_dmac: Add synchronization support Date: Tue, 20 Oct 2015 11:46:30 +0200 Message-Id: <1445334391-12272-4-git-send-email-lars@metafoo.de> X-Mailer: git-send-email 2.1.4 In-Reply-To: <1445334391-12272-1-git-send-email-lars@metafoo.de> References: <1445334391-12272-1-git-send-email-lars@metafoo.de> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Implement the new device_synchronize() callback to allow proper synchronization when stopping a channel. Since the driver already makes sure that no new complete callbacks are scheduled after the device_terminate_all() callback has been called, all left to do in the device_synchronize() callback is to wait for all currently running complete callbacks to finish. Signed-off-by: Lars-Peter Clausen --- drivers/dma/dma-axi-dmac.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/dma/dma-axi-dmac.c b/drivers/dma/dma-axi-dmac.c index 5b2395e..c346809 100644 --- a/drivers/dma/dma-axi-dmac.c +++ b/drivers/dma/dma-axi-dmac.c @@ -307,6 +307,13 @@ static int axi_dmac_terminate_all(struct dma_chan *c) return 0; } +static void axi_dmac_synchronize(struct dma_chan *c) +{ + struct axi_dmac_chan *chan = to_axi_dmac_chan(c); + + vchan_synchronize(&chan->vchan); +} + static void axi_dmac_issue_pending(struct dma_chan *c) { struct axi_dmac_chan *chan = to_axi_dmac_chan(c); @@ -613,6 +620,7 @@ static int axi_dmac_probe(struct platform_device *pdev) dma_dev->device_prep_dma_cyclic = axi_dmac_prep_dma_cyclic; dma_dev->device_prep_interleaved_dma = axi_dmac_prep_interleaved; dma_dev->device_terminate_all = axi_dmac_terminate_all; + dma_dev->device_synchronize = axi_dmac_synchronize; dma_dev->dev = &pdev->dev; dma_dev->chancnt = 1; dma_dev->src_addr_widths = BIT(dmac->chan.src_width); -- 2.1.4