hwrng: tx4939 - simplify use of devm_ioremap_resource

Remove unneeded error handling on the result of a call to
platform_get_resource when the value is passed to devm_ioremap_resource.

Move the call to platform_get_resource adjacent to the call to
devm_ioremap_resource to make the connection between them more clear.

A simplified version of the semantic patch that makes this change is as
follows: (http://coccinelle.lip6.fr/)

// <smpl>
@@
expression pdev,res,n,e,e1;
expression ret != 0;
identifier l;
@@

- res = platform_get_resource(pdev, IORESOURCE_MEM, n);
  ... when != res
- if (res == NULL) { ... \(goto l;\|return ret;\) }
  ... when != res
+ res = platform_get_resource(pdev, IORESOURCE_MEM, n);
  e = devm_ioremap_resource(e1, res);
// </smpl>

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

1 files changed, 1 insertions, 3 deletions

diff --git a/drivers/char/hw_random/tx4939-rng.c b/drivers/char/hw_random/tx4939-rng.c
index 00593c847cf0..09c5fbea2b93 100644
--- a/drivers/char/hw_random/tx4939-rng.c
+++ b/drivers/char/hw_random/tx4939-rng.c
@@ -110,12 +110,10 @@ static int __init tx4939_rng_probe(struct platform_device *dev)
         struct resource *r;
         int i;
 
-        r = platform_get_resource(dev, IORESOURCE_MEM, 0);
-        if (!r)
-                return -EBUSY;
         rngdev = devm_kzalloc(&dev->dev, sizeof(*rngdev), GFP_KERNEL);
         if (!rngdev)
                 return -ENOMEM;
+        r = platform_get_resource(dev, IORESOURCE_MEM, 0);
         rngdev->base = devm_ioremap_resource(&dev->dev, r);
         if (IS_ERR(rngdev->base))
                 return PTR_ERR(rngdev->base);