linux-kernel - [PATCH v1 2/9] dmaengine: fsl-edma-common: add condition check for fsl_edma_chan

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Date:   Thu,  2 Jul 2020 23:08:02 +0800
From:   Robin Gong <yibin.gong@....com>
To:     vkoul@...nel.org, robh+dt@...nel.org, shawnguo@...nel.org,
        s.hauer@...gutronix.de, festevam@...il.com,
        catalin.marinas@....com, will@...nel.org, dan.j.williams@...el.com,
        angelo@...am.it
Cc:     kernel@...gutronix.de, linux-imx@....com,
        dmaengine@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: [PATCH v1 2/9] dmaengine: fsl-edma-common: add condition check for fsl_edma_chan_mux

Since next edma3 don't have dmamux, add condition check in the common
fsl_edma_free_chan_resources().

Signed-off-by: Robin Gong <yibin.gong@....com>
---
 drivers/dma/fsl-edma-common.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/dma/fsl-edma-common.c b/drivers/dma/fsl-edma-common.c
index ef5294f0..d19e8a8 100644
--- a/drivers/dma/fsl-edma-common.c
+++ b/drivers/dma/fsl-edma-common.c
@@ -642,7 +642,10 @@ void fsl_edma_free_chan_resources(struct dma_chan *chan)
 
 	spin_lock_irqsave(&fsl_chan->vchan.lock, flags);
 	fsl_chan->edma->drvdata->dis_req(fsl_chan);
-	fsl_edma_chan_mux(fsl_chan, 0, false);
+
+	if (fsl_chan->edma->drvdata->dmamuxs)
+		fsl_edma_chan_mux(fsl_chan, 0, false);
+
 	fsl_chan->edesc = NULL;
 	vchan_get_all_descriptors(&fsl_chan->vchan, &head);
 	fsl_edma_unprep_slave_dma(fsl_chan);
-- 
2.7.4