linux-kernel - [PATCH 2/4] sound/soc/ep93xx/ep93xx-i2s.c: add missing kfree

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Date:	Sat, 20 Aug 2011 08:12:39 +0200
From:	Julia Lawall <julia@...u.dk>
To:	Liam Girdwood <lrg@...com>
Cc:	kernel-janitors@...r.kernel.org,
	Mark Brown <broonie@...nsource.wolfsonmicro.com>,
	Jaroslav Kysela <perex@...ex.cz>, Takashi Iwai <tiwai@...e.de>,
	Alexander Sverdlin <subaparts@...dex.ru>,
	Ryan Mallon <rmallon@...il.com>,
	H Hartley Sweeten <hsweeten@...ionengravers.com>,
	alsa-devel@...a-project.org, linux-kernel@...r.kernel.org
Subject: [PATCH 2/4] sound/soc/ep93xx/ep93xx-i2s.c: add missing kfree

From: Julia Lawall <julia@...u.dk>

Introduce a new label that includes kfree and jump to that one.

A simplified version of the semantic match that finds this problem is as
follows: (http://coccinelle.lip6.fr/)

// <smpl>
@@
identifier x;
expression E1!=0,E2,E3,E4;
statement S;
iterator I;
@@

(
if (...) { ... when != kfree(x)
               when != x = E3
               when != E3 = x
*  return ...;
 }
... when != x = E2
    when != I(...,x,...) S
if (...) { ... when != x = E4
 kfree(x); ... return ...; }
)
// </smpl>

Signed-off-by: Julia Lawall <julia@...u.dk>

---
 sound/soc/ep93xx/ep93xx-i2s.c |    5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/sound/soc/ep93xx/ep93xx-i2s.c b/sound/soc/ep93xx/ep93xx-i2s.c
index 56efa0c..099614e 100644
--- a/sound/soc/ep93xx/ep93xx-i2s.c
+++ b/sound/soc/ep93xx/ep93xx-i2s.c
@@ -385,14 +385,14 @@ static int ep93xx_i2s_probe(struct platform_device *pdev)
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	if (!res) {
 		err = -ENODEV;
-		goto fail;
+		goto fail_free_info;
 	}
 
 	info->mem = request_mem_region(res->start, resource_size(res),
 				       pdev->name);
 	if (!info->mem) {
 		err = -EBUSY;
-		goto fail;
+		goto fail_free_info;
 	}
 
 	info->regs = ioremap(info->mem->start, resource_size(info->mem));
@@ -435,6 +435,7 @@ fail_unmap_mem:
 	iounmap(info->regs);
 fail_release_mem:
 	release_mem_region(info->mem->start, resource_size(info->mem));
+fail_free_info:
 	kfree(info);
 fail:
 	return err;

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