linux-kernel - [PATCH] sound: soc: fsl: Fix memory leak in imx-audmux.c

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Date:	Sat, 12 Oct 2013 19:22:34 -0300
From:	Felipe Pena <felipensp@...il.com>
To:	Liam Girdwood <lgirdwood@...il.com>,
	Mark Brown <broonie@...nel.org>,
	Jaroslav Kysela <perex@...ex.cz>, Takashi Iwai <tiwai@...e.de>,
	Fabio Estevam <fabio.estevam@...escale.com>,
	Markus Pargmann <mpa@...gutronix.de>,
	Bill Pemberton <wfp5p@...ginia.edu>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:	alsa-devel@...a-project.org, linux-kernel@...r.kernel.org,
	Felipe Pena <felipensp@...il.com>
Subject: [PATCH] sound: soc: fsl: Fix memory leak in imx-audmux.c

When audmux_clk is used and clk_prepare_enable function succeed,
the memory alloc'd to buf variable is leaked

Signed-off-by: Felipe Pena <felipensp@...il.com>
---
 sound/soc/fsl/imx-audmux.c |    9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/sound/soc/fsl/imx-audmux.c b/sound/soc/fsl/imx-audmux.c
index d3bf71a..977759a 100644
--- a/sound/soc/fsl/imx-audmux.c
+++ b/sound/soc/fsl/imx-audmux.c
@@ -66,19 +66,20 @@ static ssize_t audmux_read_file(struct file *file, char __user *user_buf,
 				size_t count, loff_t *ppos)
 {
 	ssize_t ret;
-	char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
+	char *buf;
 	int port = (int)file->private_data;
 	u32 pdcr, ptcr;
 
-	if (!buf)
-		return -ENOMEM;
-
 	if (audmux_clk) {
 		ret = clk_prepare_enable(audmux_clk);
 		if (ret)
 			return ret;
 	}
 
+	buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
+	if (!buf)
+		return -ENOMEM;
+
 	ptcr = readl(audmux_base + IMX_AUDMUX_V2_PTCR(port));
 	pdcr = readl(audmux_base + IMX_AUDMUX_V2_PDCR(port));
 
-- 
1.7.10.4

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