linux-kernel - [PATCH] dmaengine: sprd: Use devm_ioremap

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Message-Id: <f9cd52658e3733fc97d189d836be031a295bf6d3.1525836125.git.baolin.wang@linaro.org>
Date:   Wed,  9 May 2018 11:23:50 +0800
From:   Baolin Wang <baolin.wang@...aro.org>
To:     dan.j.williams@...el.com, vinod.koul@...el.com
Cc:     broonie@...nel.org, lars@...afoo.de, baolin.wang@...aro.org,
        dmaengine@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] dmaengine: sprd: Use devm_ioremap_resource() to map memory

Instead of checking the return value of platform_get_resource(), we can
use devm_ioremap_resource() which has the NULL pointer check and the
momery region requesting.

Suggested-by: Lars-Peter Clausen <lars@...afoo.de>
Signed-off-by: Baolin Wang <baolin.wang@...aro.org>
---
 drivers/dma/sprd-dma.c |    5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/drivers/dma/sprd-dma.c b/drivers/dma/sprd-dma.c
index dba7a17..e715d07 100644
--- a/drivers/dma/sprd-dma.c
+++ b/drivers/dma/sprd-dma.c
@@ -807,10 +807,7 @@ static int sprd_dma_probe(struct platform_device *pdev)
 	}
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!res)
-		return -EINVAL;
-	sdev->glb_base = devm_ioremap_nocache(&pdev->dev, res->start,
-					      resource_size(res));
+	sdev->glb_base = devm_ioremap_resource(&pdev->dev, res);
 	if (!sdev->glb_base)
 		return -ENOMEM;
 
-- 
1.7.9.5