linux-kernel - [PATCH 8/29] drivers/cpuidle/cpuidle-kirkwood.c: simplify use of devm_ioremap

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Date:	Wed, 14 Aug 2013 11:11:12 +0200
From:	Julia Lawall <Julia.Lawall@...6.fr>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
Cc:	kernel-janitors@...r.kernel.org,
	Daniel Lezcano <daniel.lezcano@...aro.org>,
	linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 8/29] drivers/cpuidle/cpuidle-kirkwood.c: simplify use of devm_ioremap_resource

From: Julia Lawall <Julia.Lawall@...6.fr>

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

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@...6.fr>

---
 drivers/cpuidle/cpuidle-kirkwood.c |    3 ---
 1 file changed, 3 deletions(-)

diff --git a/drivers/cpuidle/cpuidle-kirkwood.c b/drivers/cpuidle/cpuidle-kirkwood.c
index 521b0a7..2237135 100644
--- a/drivers/cpuidle/cpuidle-kirkwood.c
+++ b/drivers/cpuidle/cpuidle-kirkwood.c
@@ -60,9 +60,6 @@ static int kirkwood_cpuidle_probe(struct platform_device *pdev)
 	struct resource *res;
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (res == NULL)
-		return -EINVAL;
-
 	ddr_operation_base = devm_ioremap_resource(&pdev->dev, res);
 	if (IS_ERR(ddr_operation_base))
 		return PTR_ERR(ddr_operation_base);

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