linux-kernel - [PATCH 3.18 022/150] ASoC: tlv320aic31xx: Fix off by one error in the loop stucture.

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Message-Id: <20150114072056.868795797@linuxfoundation.org>
Date:	Tue, 13 Jan 2015 23:21:33 -0800
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org, David Binderman <dcb314@...mail.com>,
	Jyri Sarha <jsarha@...com>, Mark Brown <broonie@...nel.org>
Subject: [PATCH 3.18 022/150] ASoC: tlv320aic31xx: Fix off by one error in the loop stucture.

3.18-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Jyri Sarha <jsarha@...com>

commit bbc686b34650b0f54affe9d9a637ccbe02b03760 upstream.

Fix off by one read beyond the end of a table.

Reported-by: David Binderman <dcb314@...mail.com>
Signed-off-by: Jyri Sarha <jsarha@...com>
Signed-off-by: Mark Brown <broonie@...nel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 sound/soc/codecs/tlv320aic31xx.c |   13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

--- a/sound/soc/codecs/tlv320aic31xx.c
+++ b/sound/soc/codecs/tlv320aic31xx.c
@@ -911,12 +911,13 @@ static int aic31xx_set_dai_sysclk(struct
 	}
 	aic31xx->p_div = i;
 
-	for (i = 0; aic31xx_divs[i].mclk_p != freq/aic31xx->p_div; i++) {
-		if (i == ARRAY_SIZE(aic31xx_divs)) {
-			dev_err(aic31xx->dev, "%s: Unsupported frequency %d\n",
-				__func__, freq);
-			return -EINVAL;
-		}
+	for (i = 0; i < ARRAY_SIZE(aic31xx_divs) &&
+		     aic31xx_divs[i].mclk_p != freq/aic31xx->p_div; i++)
+		;
+	if (i == ARRAY_SIZE(aic31xx_divs)) {
+		dev_err(aic31xx->dev, "%s: Unsupported frequency %d\n",
+			__func__, freq);
+		return -EINVAL;
 	}
 
 	/* set clock on MCLK, BCLK, or GPIO1 as PLL input */


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