hwrng: omap - use devm_request_and_ioremap

Using devm_request_and_ioremap is more concise.

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

1 files changed, 2 insertions, 20 deletions

diff --git a/drivers/char/hw_random/omap-rng.c b/drivers/char/hw_random/omap-rng.c
index b757fac3cd1f..448ddb59438a 100644
--- a/drivers/char/hw_random/omap-rng.c
+++ b/drivers/char/hw_random/omap-rng.c
@@ -113,22 +113,12 @@ static int __devinit omap_rng_probe(struct platform_device *pdev)
 
         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 
-        if (!res) {
-                ret = -ENOENT;
-                goto err_region;
-        }
-
-        if (!request_mem_region(res->start, resource_size(res), pdev->name)) {
-                ret = -EBUSY;
-                goto err_region;
-        }
-
-        dev_set_drvdata(&pdev->dev, res);
-        rng_base = ioremap(res->start, resource_size(res));
+        rng_base = devm_request_and_ioremap(&pdev->dev, res);
         if (!rng_base) {
                 ret = -ENOMEM;
                 goto err_ioremap;
         }
+        dev_set_drvdata(&pdev->dev, res);
 
         ret = hwrng_register(&omap_rng_ops);
         if (ret)
@@ -143,11 +133,8 @@ static int __devinit omap_rng_probe(struct platform_device *pdev)
         return 0;
 
 err_register:
-        iounmap(rng_base);
         rng_base = NULL;
 err_ioremap:
-        release_mem_region(res->start, resource_size(res));
-err_region:
         if (cpu_is_omap24xx()) {
                 clk_disable(rng_ick);
                 clk_put(rng_ick);
@@ -157,20 +144,15 @@ err_region:
 
 static int __exit omap_rng_remove(struct platform_device *pdev)
 {
-        struct resource *res = dev_get_drvdata(&pdev->dev);
-
         hwrng_unregister(&omap_rng_ops);
 
         omap_rng_write_reg(RNG_MASK_REG, 0x0);
 
-        iounmap(rng_base);
-
         if (cpu_is_omap24xx()) {
                 clk_disable(rng_ick);
                 clk_put(rng_ick);
         }
 
-        release_mem_region(res->start, resource_size(res));
         rng_base = NULL;
 
         return 0;