linux-kernel - [PATCH 2/6] dmaengine: mxs: add the remove function

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Date:   Wed, 15 Jan 2020 05:43:59 +0800
From:   Han Xu <han.xu@....com>
To:     vkoul@...nel.org, shawnguo@...nel.org, s.hauer@...gutronix.de,
        miquel.raynal@...tlin.com, richard@....at, vigneshr@...com,
        esben@...nix.com, boris.brezillon@...labora.com
Cc:     festevam@...il.com, linux-imx@....com, dmaengine@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, han.xu@....com,
        linux-mtd@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH 2/6] dmaengine: mxs: add the remove function

add the remove function for mxs-dma

Signed-off-by: Han Xu <han.xu@....com>
---
 drivers/dma/mxs-dma.c | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/drivers/dma/mxs-dma.c b/drivers/dma/mxs-dma.c
index 9deaaf4fc58f..b458f06f9067 100644
--- a/drivers/dma/mxs-dma.c
+++ b/drivers/dma/mxs-dma.c
@@ -863,6 +863,22 @@ static int mxs_dma_probe(struct platform_device *pdev)
 	return 0;
 }
 
+static int mxs_dma_remove(struct platform_device *pdev)
+{
+	struct mxs_dma_engine *mxs_dma = platform_get_drvdata(pdev);
+	int i;
+
+	dma_async_device_unregister(&mxs_dma->dma_device);
+
+	for (i = 0; i < MXS_DMA_CHANNELS; i++) {
+		struct mxs_dma_chan *mxs_chan = &mxs_dma->mxs_chans[i];
+
+		tasklet_kill(&mxs_chan->tasklet);
+	}
+
+	return 0;
+}
+
 static struct platform_driver mxs_dma_driver = {
 	.driver		= {
 		.name	= "mxs-dma",
@@ -870,6 +886,7 @@ static struct platform_driver mxs_dma_driver = {
 	},
 	.id_table	= mxs_dma_ids,
 	.probe		= mxs_dma_probe,
+	.remove		= mxs_dma_remove,
 };
 
 module_platform_driver(mxs_dma_driver);
-- 
2.17.1