hwrng: bcm63xx - use devm_* helpers

Simplify the driver's probe function and error handling by using the
device managed allocators, while at it, drop the redundant "out of
memory" messages since these are already printed by the allocator.

Signed-off-by: Florian Fainelli <[e-mail]>
Signed-off-by: Herbert Xu <[e-mail]>

drivers/char/hw_random/bcm63xx-rng.c

···
 		goto out;
 	}
 
-	priv = kzalloc(sizeof(*priv), GFP_KERNEL);
+	priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
 	if (!priv) {
-		dev_err(&pdev->dev, "no memory for private structure\n");
 		ret = -ENOMEM;
 		goto out;
 	}
 
-	rng = kzalloc(sizeof(*rng), GFP_KERNEL);
+	rng = devm_kzalloc(&pdev->dev, sizeof(*rng), GFP_KERNEL);
 	if (!rng) {
-		dev_err(&pdev->dev, "no memory for rng structure\n");
 		ret = -ENOMEM;
-		goto out_free_priv;
+		goto out;
 	}
 
 	platform_set_drvdata(pdev, rng);
···
 	if (IS_ERR(clk)) {
 		dev_err(&pdev->dev, "no clock for device\n");
 		ret = PTR_ERR(clk);
-		goto out_free_rng;
+		goto out;
 	}
 
 	priv->clk = clk;
···
 					resource_size(r), pdev->name)) {
 		dev_err(&pdev->dev, "request mem failed");
 		ret = -ENOMEM;
-		goto out_free_rng;
+		goto out;
 	}
 
 	priv->regs = devm_ioremap_nocache(&pdev->dev, r->start,
···
 	if (!priv->regs) {
 		dev_err(&pdev->dev, "ioremap failed");
 		ret = -ENOMEM;
-		goto out_free_rng;
+		goto out;
 	}
 
 	clk_enable(clk);
···
 
 out_clk_disable:
 	clk_disable(clk);
-out_free_rng:
-	kfree(rng);
-out_free_priv:
-	kfree(priv);
 out:
 	return ret;
 }
···
 
 	hwrng_unregister(rng);
 	clk_disable(priv->clk);
-	kfree(priv);
-	kfree(rng);
 
 	return 0;
 }