linux-kernel - [PATCH 3.16 082/158] ASoC: adau1701: fix adau1701_reg

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Message-Id: <20140915192545.352214805@linuxfoundation.org>
Date:	Mon, 15 Sep 2014 12:25:21 -0700
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org, Daniel Mack <zonque@...il.com>,
	Lars-Peter Clausen <lars@...afoo.de>,
	Mark Brown <broonie@...aro.org>
Subject: [PATCH 3.16 082/158] ASoC: adau1701: fix adau1701_reg_read()

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

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

From: Daniel Mack <zonque@...il.com>

commit 3ad80b828b2533f37c221e2df155774efd6ed814 upstream.

Fix a long standing bug in the read register routing of adau1701.
The bytes arrive in the buffer in big-endian, so the result has to be
shifted before and-ing the bytes in the loop.

Signed-off-by: Daniel Mack <zonque@...il.com>
Acked-by: Lars-Peter Clausen <lars@...afoo.de>
Signed-off-by: Mark Brown <broonie@...aro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 sound/soc/codecs/adau1701.c |    6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

--- a/sound/soc/codecs/adau1701.c
+++ b/sound/soc/codecs/adau1701.c
@@ -230,8 +230,10 @@ static int adau1701_reg_read(void *conte
 
 	*value = 0;
 
-	for (i = 0; i < size; i++)
-		*value |= recv_buf[i] << (i * 8);
+	for (i = 0; i < size; i++) {
+		*value <<= 8;
+		*value |= recv_buf[i];
+	}
 
 	return 0;
 }


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