[PATCH 3.12 078/142] ASoC: adau1701: fix adau1701_reg_read()

[Jiri Slaby]

From: Daniel Mack <zonque@xxxxxxxxx>

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

===============

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@xxxxxxxxx>
Acked-by: Lars-Peter Clausen <lars@xxxxxxxxxx>
Signed-off-by: Mark Brown <broonie@xxxxxxxxxx>
Signed-off-by: Jiri Slaby <jslaby@xxxxxxx>
---
 sound/soc/codecs/adau1701.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/sound/soc/codecs/adau1701.c b/sound/soc/codecs/adau1701.c
index adee866f463f..56bfc679f437 100644
--- a/sound/soc/codecs/adau1701.c
+++ b/sound/soc/codecs/adau1701.c
@@ -230,8 +230,10 @@ static int adau1701_reg_read(void *context, unsigned int reg,
 
 	*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;
 }
-- 
2.1.0

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