linux-kernel - [PATCH 3.16 016/366] staging:iio:ade7854: Fix the wrong number of bits to read

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Date:   Sun, 11 Nov 2018 19:49:05 +0000
From:   Ben Hutchings <ben@...adent.org.uk>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
CC:     akpm@...ux-foundation.org,
        "John Syne" <rodrigosiqueiramelo@...il.com>,
        "John Syne" <john3909@...il.com>,
        "Jonathan Cameron" <Jonathan.Cameron@...wei.com>
Subject: [PATCH 3.16 016/366] staging:iio:ade7854: Fix the wrong number of
 bits to read

3.16.61-rc1 review patch.  If anyone has any objections, please let me know.

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

From: John Syne <rodrigosiqueiramelo@...il.com>

commit 6cef2ab01636b6021044f349df466a97c408ec27 upstream.

Fixes: correctly handle the data size in the read operation for I2C

The function ade7854_i2c_read_reg_32() have to invoke the
i2c_master_recv() for read 32 bits values, however, the counter is set
to 3 which means 24 bits. This patch fixes the wrong size of 24 bits, to
32 bits.

Signed-off-by: John Syne <john3909@...il.com>
Signed-off-by: Rodrigo Siqueira <rodrigosiqueiramelo@...il.com>
Fixes: 8d97a5877 ("staging: iio: meter: new driver for ADE7754 devices")
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@...wei.com>
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
 drivers/staging/iio/meter/ade7854-i2c.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/staging/iio/meter/ade7854-i2c.c
+++ b/drivers/staging/iio/meter/ade7854-i2c.c
@@ -191,7 +191,7 @@ static int ade7854_i2c_read_reg_32(struc
 	if (ret < 0)
 		goto out;
 
-	ret = i2c_master_recv(st->i2c, st->rx, 3);
+	ret = i2c_master_recv(st->i2c, st->rx, 4);
 	if (ret < 0)
 		goto out;