hwrng: pixocell - Use devm_ioremap_resource()
Use devm_ioremap_resource() in order to make the code simpler,
and remove redundant return value check of platform_get_resource()
because the value is checked by devm_ioremap_resource().
Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
diff --git a/drivers/char/hw_random/picoxcell-rng.c b/drivers/char/hw_random/picoxcell-rng.c
index 3d4c229..c03beee 100644
--- a/drivers/char/hw_random/picoxcell-rng.c
+++ b/drivers/char/hw_random/picoxcell-rng.c
@@ -104,22 +104,9 @@
int ret;
struct resource *mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- if (!mem) {
- dev_warn(&pdev->dev, "no memory resource\n");
- return -ENOMEM;
- }
-
- if (!devm_request_mem_region(&pdev->dev, mem->start, resource_size(mem),
- "picoxcell_trng")) {
- dev_warn(&pdev->dev, "unable to request io mem\n");
- return -EBUSY;
- }
-
- rng_base = devm_ioremap(&pdev->dev, mem->start, resource_size(mem));
- if (!rng_base) {
- dev_warn(&pdev->dev, "unable to remap io mem\n");
- return -ENOMEM;
- }
+ rng_base = devm_ioremap_resource(&pdev->dev, mem);
+ if (IS_ERR(rng_base))
+ return PTR_ERR(rng_base);
rng_clk = clk_get(&pdev->dev, NULL);
if (IS_ERR(rng_clk)) {