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hwrng: pixocell - Use devm_ioremap_resource()

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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>
This commit is contained in:
Jingoo Han 2014-02-12 14:19:48 +09:00 committed by Herbert Xu
parent bfaff75b09
commit fb5d23e3e0
1 changed files with 3 additions and 16 deletions
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19
drivers/char/hw_random/picoxcell-rng.c
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@ -104,22 +104,9 @@ static int picoxcell_trng_probe(struct platform_device *pdev)
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)) {