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| author | Tom Rix <trix@redhat.com> | 2021-12-24 07:08:33 -0800 |
|---|---|---|
| committer | Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2021-12-28 18:37:41 +0000 |
| commit | 38ac2f038666521f94d4fa37b5a9441cef832ccf (patch) | |
| tree | 640bf9147be8a20c07bc4f90a47a8764f7e8f2e8 /drivers/iio | |
| parent | 088879292a0a3672a6acc9215174fbc355ed3daa (diff) | |
| download | linux-38ac2f038666521f94d4fa37b5a9441cef832ccf.tar.gz linux-38ac2f038666521f94d4fa37b5a9441cef832ccf.tar.bz2 linux-38ac2f038666521f94d4fa37b5a9441cef832ccf.zip | |
iio: chemical: sunrise_co2: set val parameter only on success
Clang static analysis reports this representative warning
sunrise_co2.c:410:9: warning: Assigned value is garbage or undefined
*val = value;
^ ~~~~~
The ealier call to sunrise_read_word can fail without setting
value. So defer setting val until we know the read was successful.
Fixes: c397894e24f1 ("iio: chemical: Add Senseair Sunrise 006-0-007 driver")
Signed-off-by: Tom Rix <trix@redhat.com>
Link: https://lore.kernel.org/r/20211224150833.3278236-1-trix@redhat.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Diffstat (limited to 'drivers/iio')
| -rw-r--r-- | drivers/iio/chemical/sunrise_co2.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/iio/chemical/sunrise_co2.c b/drivers/iio/chemical/sunrise_co2.c index 233bd0f379c9..8440dc0c77cf 100644 --- a/drivers/iio/chemical/sunrise_co2.c +++ b/drivers/iio/chemical/sunrise_co2.c @@ -407,24 +407,24 @@ static int sunrise_read_raw(struct iio_dev *iio_dev, mutex_lock(&sunrise->lock); ret = sunrise_read_word(sunrise, SUNRISE_CO2_FILTERED_COMP_REG, &value); - *val = value; mutex_unlock(&sunrise->lock); if (ret) return ret; + *val = value; return IIO_VAL_INT; case IIO_TEMP: mutex_lock(&sunrise->lock); ret = sunrise_read_word(sunrise, SUNRISE_CHIP_TEMPERATURE_REG, &value); - *val = value; mutex_unlock(&sunrise->lock); if (ret) return ret; + *val = value; return IIO_VAL_INT; default: |