linux-kernel - [PATCH 3.17 038/122] ASoC: rockchip-i2s: fix infinite loop in rockchip_snd

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Message-Id: <20141205223311.158398175@linuxfoundation.org>
Date:	Fri,  5 Dec 2014 14:43:32 -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, Jianqun <jay.xu@...k-chips.com>,
	Mark Brown <broonie@...nel.org>
Subject: [PATCH 3.17 038/122] ASoC: rockchip-i2s: fix infinite loop in rockchip_snd_rxctrl

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

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

From: Jianqun <jay.xu@...k-chips.com>

commit 29f95bd76f6ec1eff88eec6a04191104a11a7f97 upstream.

We can get into an infinite loop if the I2S_CLR register fails to
clear due to a missing break statement, so add that.

Signed-off-by: Jianqun <jay.xu@...k-chips.com>
Signed-off-by: Mark Brown <broonie@...nel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 sound/soc/rockchip/rockchip_i2s.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

--- a/sound/soc/rockchip/rockchip_i2s.c
+++ b/sound/soc/rockchip/rockchip_i2s.c
@@ -152,8 +152,10 @@ static void rockchip_snd_rxctrl(struct r
 			while (val) {
 				regmap_read(i2s->regmap, I2S_CLR, &val);
 				retry--;
-				if (!retry)
+				if (!retry) {
 					dev_warn(i2s->dev, "fail to clear\n");
+					break;
+				}
 			}
 		}
 	}


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