linux-kernel - [PATCH] iio: adc: ina2xx: fix missing break statement

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Message-Id: <20181008210904.9362-1-colin.king@canonical.com>
Date:   Mon,  8 Oct 2018 22:09:04 +0100
From:   Colin King <colin.king@...onical.com>
To:     Jonathan Cameron <jic23@...nel.org>,
        Hartmut Knaack <knaack.h@....de>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Peter Meerwald-Stadler <pmeerw@...erw.net>,
        Stefan Brüns <stefan.bruens@...h-aachen.de>,
        linux-iio@...r.kernel.org
Cc:     kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] iio: adc: ina2xx: fix missing break statement

From: Colin Ian King <colin.king@...onical.com>

The IIO_CHAN_INFO_SCALE case is missing a break statement and in
the unlikely event that chan->address is not matched in the nested
switch statement then the code falls through to the following
IIO_CHAN_INFO_HARDWAREGAIN case.  Fix this by adding the missing
break.   While we are fixing this, it's probably a good idea to
add in a break statement to the IIO_CHAN_INFO_HARDWAREGAIN case
too (this is a moot point).

Detected by CoverityScan, CID#1462408 ("Missing break in switch")

Fixes: ca6a2d86acae ("iio: adc: ina2xx: Allow setting Shunt Voltage PGA gain and Bus Voltage range")
Signed-off-by: Colin Ian King <colin.king@...onical.com>
---
 drivers/iio/adc/ina2xx-adc.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/iio/adc/ina2xx-adc.c b/drivers/iio/adc/ina2xx-adc.c
index d1239624187d..9bc5986780b9 100644
--- a/drivers/iio/adc/ina2xx-adc.c
+++ b/drivers/iio/adc/ina2xx-adc.c
@@ -250,6 +250,7 @@ static int ina2xx_read_raw(struct iio_dev *indio_dev,
 			*val2 = chip->shunt_resistor_uohm;
 			return IIO_VAL_FRACTIONAL;
 		}
+		break;
 
 	case IIO_CHAN_INFO_HARDWAREGAIN:
 		switch (chan->address) {
@@ -262,6 +263,7 @@ static int ina2xx_read_raw(struct iio_dev *indio_dev,
 			*val = chip->range_vbus == 32 ? 1 : 2;
 			return IIO_VAL_INT;
 		}
+		break;
 	}
 
 	return -EINVAL;
-- 
2.17.1