lkml.org 
[lkml]   [2021]   [Dec]   [24]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH] iio: chemical: set val parameter only on success
Date
From: Tom Rix <trix@redhat.com>

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>
---
drivers/iio/chemical/sunrise_co2.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/iio/chemical/sunrise_co2.c b/drivers/iio/chemical/sunrise_co2.c
index 233bd0f379c93..8440dc0c77cfe 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:
--
2.26.3
\
 
 \ /
  Last update: 2021-12-24 16:09    [W:0.076 / U:0.144 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site