[PATCH 9/29] drivers/char/hw_random/tx4939-rng.c: simplify use of devm_ioremap_resource

Julia Lawall
2013-08-14T09:11:13Z

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>

---
drivers/char/hw_random/tx4939-rng.c | 4 +---
1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/drivers/char/hw_random/tx4939-rng.c b/drivers/char/hw_random/tx4939-rng.c
index 00593c8..09c5fbe 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);