hwrng: use platform_{get,set}_drvdata()

Use the wrapper functions for getting and setting the driver data using
platform_device instead of using dev_{get,set}_drvdata() with &pdev->dev,
so we can directly pass a struct platform_device.

Also, unnecessary dev_set_drvdata() is removed, because the driver core
clears the driver data to NULL after device_release or on probe failure.
Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

drivers/char/hw_random/n2-drv.c

@@ -700,7 +700,7 @@ static int n2rng_probe(struct platform_device *op)
 	if (err)
 		goto out_free_units;
 
-	dev_set_drvdata(&op->dev, np);
+	platform_set_drvdata(op, np);
 
 	schedule_delayed_work(&np->work, 0);
 
@@ -721,7 +721,7 @@ static int n2rng_probe(struct platform_device *op)
 
 static int n2rng_remove(struct platform_device *op)
 {
-	struct n2rng *np = dev_get_drvdata(&op->dev);
+	struct n2rng *np = platform_get_drvdata(op);
 
 	np->flags |= N2RNG_FLAG_SHUTDOWN;
 
@@ -736,8 +736,6 @@ static int n2rng_remove(struct platform_device *op)
 
 	kfree(np);
 
-	dev_set_drvdata(&op->dev, NULL);
-
 	return 0;
 }
 

drivers/char/hw_random/octeon-rng.c

@@ -96,7 +96,7 @@ static int octeon_rng_probe(struct platform_device *pdev)
 
 	rng->ops = ops;
 
-	dev_set_drvdata(&pdev->dev, &rng->ops);
+	platform_set_drvdata(pdev, &rng->ops);
 	ret = hwrng_register(&rng->ops);
 	if (ret)
 		return -ENOENT;
@@ -108,7 +108,7 @@ static int octeon_rng_probe(struct platform_device *pdev)
 
 static int __exit octeon_rng_remove(struct platform_device *pdev)
 {
-	struct hwrng *rng = dev_get_drvdata(&pdev->dev);
+	struct hwrng *rng = platform_get_drvdata(pdev);
 
 	hwrng_unregister(rng);
 

drivers/char/hw_random/omap-rng.c

@@ -116,7 +116,7 @@ static int omap_rng_probe(struct platform_device *pdev)
 	};
 
 	omap_rng_ops.priv = (unsigned long)priv;
-	dev_set_drvdata(&pdev->dev, priv);
+	platform_set_drvdata(pdev, priv);
 
 	priv->mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	if (!priv->mem_res) {
@@ -129,7 +129,7 @@ static int omap_rng_probe(struct platform_device *pdev)
 		ret = PTR_ERR(priv->base);
 		goto err_ioremap;
 	}
-	dev_set_drvdata(&pdev->dev, priv);
+	platform_set_drvdata(pdev, priv);
 
 	pm_runtime_enable(&pdev->dev);
 	pm_runtime_get_sync(&pdev->dev);
@@ -156,7 +156,7 @@ static int omap_rng_probe(struct platform_device *pdev)
 
 static int __exit omap_rng_remove(struct platform_device *pdev)
 {
-	struct omap_rng_private_data *priv = dev_get_drvdata(&pdev->dev);
+	struct omap_rng_private_data *priv = platform_get_drvdata(pdev);
 
 	hwrng_unregister(&omap_rng_ops);