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iio: adc: ina2xx: add in early -EINVAL returns in case statements

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Static analysis with CoverityScan is throwing warnings that specific
case statements are missing breaks.  Rather than adding breaks, add
return -EINVAL to the specific case statements to clarify the
error return paths. Fix also saves 50 bytes.

Before:
   text	   data	    bss	    dec	    hex	filename
  21418	   4936	    128	  26482	   6772	drivers/iio/adc/ina2xx-adc.o

After:
  dec	    hex	filename
  21370	   4936	    128	  26434	   6742	drivers/iio/adc/ina2xx-adc.o

(gcc 8.2, x86-64)

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

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Reviewed-by: Stefan Brüns <stefan.bruens@rwth-aachen.de>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Colin Ian King 2018-10-16 17:14:18 +01:00 committed by Jonathan Cameron
parent e480490c90
commit d42282db6c
1 changed files with 2 additions and 0 deletions
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2
drivers/iio/adc/ina2xx-adc.c
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@ -250,6 +250,7 @@ static int ina2xx_read_raw(struct iio_dev *indio_dev,
*val2 = chip->shunt_resistor_uohm;
return IIO_VAL_FRACTIONAL;
}
return -EINVAL;
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;
}
return -EINVAL;
}
return -EINVAL;