linux-kernel - [PATCH 15/29] ASoC: tegra20-ac97: simplify use of devm_ioremap

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Date:	Wed, 14 Aug 2013 11:11:19 +0200
From:	Julia Lawall <Julia.Lawall@...6.fr>
To:	Liam Girdwood <lgirdwood@...il.com>
Cc:	kernel-janitors@...r.kernel.org, Mark Brown <broonie@...nel.org>,
	Jaroslav Kysela <perex@...ex.cz>, Takashi Iwai <tiwai@...e.de>,
	Stephen Warren <swarren@...dotorg.org>,
	alsa-devel@...a-project.org, linux-tegra@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH 15/29] ASoC: tegra20-ac97: 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>

---
 sound/soc/tegra/tegra20_ac97.c |    6 ------
 1 file changed, 6 deletions(-)

diff --git a/sound/soc/tegra/tegra20_ac97.c b/sound/soc/tegra/tegra20_ac97.c
index 00106b5..ae27bcd 100644
--- a/sound/soc/tegra/tegra20_ac97.c
+++ b/sound/soc/tegra/tegra20_ac97.c
@@ -334,12 +334,6 @@ static int tegra20_ac97_platform_probe(struct platform_device *pdev)
 	}
 
 	mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!mem) {
-		dev_err(&pdev->dev, "No memory resource\n");
-		ret = -ENODEV;
-		goto err_clk_put;
-	}
-
 	regs = devm_ioremap_resource(&pdev->dev, mem);
 	if (IS_ERR(regs)) {
 		ret = PTR_ERR(regs);

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