linux-kernel - [PATCH 2/3] dmaengine: sprd: delete enable opreation in probe

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Date:   Wed, 25 Oct 2023 20:12:46 +0800
From:   Kaiwei Liu <kaiwei.liu@...soc.com>
To:     Vinod Koul <vkoul@...nel.org>, Orson Zhai <orsonzhai@...il.com>,
        Baolin Wang <baolin.wang@...ux.alibaba.com>,
        Chunyan Zhang <zhang.lyra@...il.com>
CC:     <dmaengine@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        kaiwei liu <liukaiwei086@...il.com>,
        Wenming Wu <wenming.wu@...soc.com>
Subject: [PATCH 2/3] dmaengine: sprd: delete enable opreation in probe

From: "kaiwei.liu" <kaiwei.liu@...soc.com>

In the probe of dma, it will allocate device memory and do some
initalization settings. All operations are only at the software
level and don't need the DMA hardware power on. It doesn't need
to resume the device and set the device active as well. here
delete unnecessary operation.

Signed-off-by: kaiwei.liu <kaiwei.liu@...soc.com>
---
 drivers/dma/sprd-dma.c | 19 ++-----------------
 1 file changed, 2 insertions(+), 17 deletions(-)

diff --git a/drivers/dma/sprd-dma.c b/drivers/dma/sprd-dma.c
index 0fa950dfa4f0..f8ed2f3f764b 100644
--- a/drivers/dma/sprd-dma.c
+++ b/drivers/dma/sprd-dma.c
@@ -1203,21 +1203,11 @@ static int sprd_dma_probe(struct platform_device *pdev)
 	}
 
 	platform_set_drvdata(pdev, sdev);
-	ret = sprd_dma_enable(sdev);
-	if (ret)
-		return ret;
-
-	pm_runtime_set_active(&pdev->dev);
-	pm_runtime_enable(&pdev->dev);
-
-	ret = pm_runtime_get_sync(&pdev->dev);
-	if (ret < 0)
-		goto err_rpm;
 
 	ret = dma_async_device_register(&sdev->dma_dev);
 	if (ret < 0) {
 		dev_err(&pdev->dev, "register dma device failed:%d\n", ret);
-		goto err_register;
+		return ret;
 	}
 
 	sprd_dma_info.dma_cap = sdev->dma_dev.cap_mask;
@@ -1226,16 +1216,11 @@ static int sprd_dma_probe(struct platform_device *pdev)
 	if (ret)
 		goto err_of_register;
 
-	pm_runtime_put(&pdev->dev);
+	pm_runtime_enable(&pdev->dev);
 	return 0;
 
 err_of_register:
 	dma_async_device_unregister(&sdev->dma_dev);
-err_register:
-	pm_runtime_put_noidle(&pdev->dev);
-	pm_runtime_disable(&pdev->dev);
-err_rpm:
-	sprd_dma_disable(sdev);
 	return ret;
 }
 
-- 
2.17.1