1 files changed, 6 insertions, 17 deletions

diff --git a/drivers/char/hw_random/atmel-rng.c b/drivers/char/hw_random/atmel-rng.c
index bf9fc6b79328..851bc7e20ad2 100644
--- a/drivers/char/hw_random/atmel-rng.c
+++ b/drivers/char/hw_random/atmel-rng.c
@@ -54,29 +54,22 @@ static int atmel_trng_probe(struct platform_device *pdev)
         struct resource *res;
         int ret;
 
-        res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-        if (!res)
-                return -EINVAL;
-
         trng = devm_kzalloc(&pdev->dev, sizeof(*trng), GFP_KERNEL);
         if (!trng)
                 return -ENOMEM;
 
-        if (!devm_request_mem_region(&pdev->dev, res->start,
-                                     resource_size(res), pdev->name))
-                return -EBUSY;
-
-        trng->base = devm_ioremap(&pdev->dev, res->start, resource_size(res));
-        if (!trng->base)
-                return -EBUSY;
+        res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+        trng->base = devm_ioremap_resource(&pdev->dev, res);
+        if (IS_ERR(trng->base))
+                return PTR_ERR(trng->base);
 
-        trng->clk = clk_get(&pdev->dev, NULL);
+        trng->clk = devm_clk_get(&pdev->dev, NULL);
         if (IS_ERR(trng->clk))
                 return PTR_ERR(trng->clk);
 
         ret = clk_enable(trng->clk);
         if (ret)
-                goto err_enable;
+                return ret;
 
         writel(TRNG_KEY | 1, trng->base + TRNG_CR);
         trng->rng.name = pdev->name;
@@ -92,9 +85,6 @@ static int atmel_trng_probe(struct platform_device *pdev)
 
 err_register:
         clk_disable(trng->clk);
-err_enable:
-        clk_put(trng->clk);
-
         return ret;
 }
 
@@ -106,7 +96,6 @@ static int atmel_trng_remove(struct platform_device *pdev)
 
         writel(TRNG_KEY, trng->base + TRNG_CR);
         clk_disable(trng->clk);
-        clk_put(trng->clk);
 
         return 0;
 }