[PATCH 3.16 082/158] ASoC: adau1701: fix adau1701_reg_read()

From: Greg Kroah-Hartman
Date: Mon Sep 15 2014 - 15:28:42 EST


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

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

From: Daniel Mack <zonque@xxxxxxxxx>

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: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
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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