linux-kernel - [PATCH] dmaengine: jz4780: Use devm_platform_ioremap_resource() in jz4780_dma

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Date:   Sun, 22 Sep 2019 11:25:20 +0200
From:   Markus Elfring <Markus.Elfring@....de>
To:     dmaengine@...r.kernel.org, Dan Williams <dan.j.williams@...el.com>,
        Paul Cercueil <paul@...pouillou.net>,
        Vinod Koul <vkoul@...nel.org>,
        Zubair Lutfullah Kakakhel <Zubair.Kakakhel@...tec.com>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        kernel-janitors@...r.kernel.org, Alex Smith <alex.smith@...tec.com>
Subject: [PATCH] dmaengine: jz4780: Use devm_platform_ioremap_resource() in
 jz4780_dma_probe()

From: Markus Elfring <elfring@...rs.sourceforge.net>
Date: Sun, 22 Sep 2019 11:18:27 +0200

Simplify this function implementation a bit by using
a known wrapper function.

This issue was detected by using the Coccinelle software.

Signed-off-by: Markus Elfring <elfring@...rs.sourceforge.net>
---
 drivers/dma/dma-jz4780.c | 8 +-------
 1 file changed, 1 insertion(+), 7 deletions(-)

diff --git a/drivers/dma/dma-jz4780.c b/drivers/dma/dma-jz4780.c
index cafb1cc065bb..f42b3ef8e036 100644
--- a/drivers/dma/dma-jz4780.c
+++ b/drivers/dma/dma-jz4780.c
@@ -858,13 +858,7 @@ static int jz4780_dma_probe(struct platform_device *pdev)
 	jzdma->soc_data = soc_data;
 	platform_set_drvdata(pdev, jzdma);

-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!res) {
-		dev_err(dev, "failed to get I/O memory\n");
-		return -EINVAL;
-	}
-
-	jzdma->chn_base = devm_ioremap_resource(dev, res);
+	jzdma->chn_base = devm_platform_ioremap_resource(pdev, 0);
 	if (IS_ERR(jzdma->chn_base))
 		return PTR_ERR(jzdma->chn_base);

--
2.23.0