linux-kernel - [PATCH 11/46] dmaengine: tegra20-apb-dma: use helper dmaenginem_async_device

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Message-Id: <20180803072016.21544-12-sjhuang@iluvatar.ai>
Date:   Fri,  3 Aug 2018 15:19:41 +0800
From:   Huang Shijie <sjhuang@...vatar.ai>
To:     vkoul@...nel.org
Cc:     dmaengine@...r.kernel.org, linux-kernel@...r.kernel.org,
        dave.jiang@...el.com, radhey.shyam.pandey@...inx.com,
        appana.durga.rao@...inx.com, jmkrzyszt@...il.com,
        gomonovych@...il.com, peter.ujfalusi@...com, keescook@...omium.org,
        horms+renesas@...ge.net.au, geert+renesas@...der.be,
        shawnguo@...nel.org, baoyou.xie@...aro.org,
        michal.simek@...inx.com, baohua@...nel.org,
        ludovic.desroches@...rochip.com, linus.walleij@...aro.org,
        david.brown@...aro.org, Huang Shijie <sjhuang@...vatar.ai>
Subject: [PATCH 11/46] dmaengine: tegra20-apb-dma: use helper dmaenginem_async_device_register

Use dmaenginem_async_device_register to simplify the code:
   remove dma_async_device_unregister
   remove the label err_unregister_dma_dev

Signed-off-by: Huang Shijie <sjhuang@...vatar.ai>
---
 drivers/dma/tegra20-apb-dma.c | 8 ++------
 1 file changed, 2 insertions(+), 6 deletions(-)

diff --git a/drivers/dma/tegra20-apb-dma.c b/drivers/dma/tegra20-apb-dma.c
index 9a558e30c461..9f6f51abbeef 100644
--- a/drivers/dma/tegra20-apb-dma.c
+++ b/drivers/dma/tegra20-apb-dma.c
@@ -1444,7 +1444,7 @@ static int tegra_dma_probe(struct platform_device *pdev)
 	tdma->dma_dev.device_tx_status = tegra_dma_tx_status;
 	tdma->dma_dev.device_issue_pending = tegra_dma_issue_pending;
 
-	ret = dma_async_device_register(&tdma->dma_dev);
+	ret = dmaenginem_async_device_register(&tdma->dma_dev);
 	if (ret < 0) {
 		dev_err(&pdev->dev,
 			"Tegra20 APB DMA driver registration failed %d\n", ret);
@@ -1456,15 +1456,13 @@ static int tegra_dma_probe(struct platform_device *pdev)
 	if (ret < 0) {
 		dev_err(&pdev->dev,
 			"Tegra20 APB DMA OF registration failed %d\n", ret);
-		goto err_unregister_dma_dev;
+		goto err_irq;
 	}
 
 	dev_info(&pdev->dev, "Tegra20 APB DMA driver register %d channels\n",
 			cdata->nr_channels);
 	return 0;
 
-err_unregister_dma_dev:
-	dma_async_device_unregister(&tdma->dma_dev);
 err_irq:
 	while (--i >= 0) {
 		struct tegra_dma_channel *tdc = &tdma->channels[i];
@@ -1485,8 +1483,6 @@ static int tegra_dma_remove(struct platform_device *pdev)
 	int i;
 	struct tegra_dma_channel *tdc;
 
-	dma_async_device_unregister(&tdma->dma_dev);
-
 	for (i = 0; i < tdma->chip_data->nr_channels; ++i) {
 		tdc = &tdma->channels[i];
 		free_irq(tdc->irq, tdc);
-- 
2.17.1