hwrng: mediatek - Use devm_platform_ioremap_resource() in mtk_rng_probe()

Simplify this function implementation by using a known wrapper function.

This issue was detected by using the Coccinelle software.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

diff --git a/drivers/char/hw_random/mtk-rng.c b/drivers/char/hw_random/mtk-rng.c
index e649be5..8ad7b51 100644 (file)
--- a/drivers/char/hw_random/mtk-rng.c
+++ b/drivers/char/hw_random/mtk-rng.c
@@ -105,16 +105,9 @@ static int mtk_rng_read(struct hwrng *rng, void *buf, size_t max, bool wait)
 
 static int mtk_rng_probe(struct platform_device *pdev)
 {
-       struct resource *res;
        int ret;
        struct mtk_rng *priv;
 
-       res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-       if (!res) {
-               dev_err(&pdev->dev, "no iomem resource\n");
-               return -ENXIO;
-       }
-
        priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
        if (!priv)
                return -ENOMEM;
@@ -135,7 +128,7 @@ static int mtk_rng_probe(struct platform_device *pdev)
                return ret;
        }
 
-       priv->base = devm_ioremap_resource(&pdev->dev, res);
+       priv->base = devm_platform_ioremap_resource(pdev, 0);
        if (IS_ERR(priv->base))
                return PTR_ERR(priv->base);