linux-kernel - [PATCH 26/29] drivers/media/platform/coda.c: simplify use of devm_ioremap

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Message-Id: <1376471493-22215-27-git-send-email-Julia.Lawall@lip6.fr>
Date:	Wed, 14 Aug 2013 11:11:30 +0200
From:	Julia Lawall <Julia.Lawall@...6.fr>
To:	Mauro Carvalho Chehab <m.chehab@...sung.com>
Cc:	kernel-janitors@...r.kernel.org, linux-media@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH 26/29] drivers/media/platform/coda.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/media/platform/coda.c |    5 -----
 1 file changed, 5 deletions(-)

diff --git a/drivers/media/platform/coda.c b/drivers/media/platform/coda.c
index 66db0df..1a2192f 100644
--- a/drivers/media/platform/coda.c
+++ b/drivers/media/platform/coda.c
@@ -3122,11 +3122,6 @@ static int coda_probe(struct platform_device *pdev)
 
 	/* Get  memory for physical registers */
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (res == NULL) {
-		dev_err(&pdev->dev, "failed to get memory region resource\n");
-		return -ENOENT;
-	}
-
 	dev->regs_base = devm_ioremap_resource(&pdev->dev, res);
 	if (IS_ERR(dev->regs_base))
 		return PTR_ERR(dev->regs_base);

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