[PATCH 08/13] staging: iio: tsl2x7x: add range checking to three sysfs attributes

[Brian Masney]

The sysfs attributes in_illuminance0_target_input,
in_illuminance0_calibrate, and in_proximity0_calibrate did not have
proper range checking in place so this patch adds the correct range
checks.

Signed-off-by: Brian Masney <masn...@onstation.org>
---
 drivers/staging/iio/light/tsl2x7x.c | 25 +++++++++++--------------
 1 file changed, 11 insertions(+), 14 deletions(-)

diff --git a/drivers/staging/iio/light/tsl2x7x.c 
b/drivers/staging/iio/light/tsl2x7x.c
index 56730baea927..15bc0af1bb6c 100644
--- a/drivers/staging/iio/light/tsl2x7x.c
+++ b/drivers/staging/iio/light/tsl2x7x.c
@@ -835,9 +835,10 @@ static ssize_t in_illuminance0_target_input_store(struct 
device *dev,
        if (kstrtoul(buf, 0, &value))
                return -EINVAL;
 
-       if (value)
-               chip->settings.als_cal_target = value;
+       if (value < 0 || value > 65535)
+               return -ERANGE;
 
+       chip->settings.als_cal_target = value;
        ret = tsl2x7x_invoke_change(indio_dev);
        if (ret < 0)
                return ret;
@@ -853,14 +854,12 @@ static ssize_t in_illuminance0_calibrate_store(struct 
device *dev,
        bool value;
        int ret;
 
-       if (strtobool(buf, &value))
+       if (kstrtobool(buf, &value) || !value)
                return -EINVAL;
 
-       if (value) {
-               ret = tsl2x7x_als_calibrate(indio_dev);
-               if (ret < 0)
-                       return ret;
-       }
+       ret = tsl2x7x_als_calibrate(indio_dev);
+       if (ret < 0)
+               return ret;
 
        ret = tsl2x7x_invoke_change(indio_dev);
        if (ret < 0)
@@ -946,14 +945,12 @@ static ssize_t in_proximity0_calibrate_store(struct 
device *dev,
        bool value;
        int ret;
 
-       if (strtobool(buf, &value))
+       if (kstrtobool(buf, &value) || !value)
                return -EINVAL;
 
-       if (value) {
-               ret = tsl2x7x_prox_cal(indio_dev);
-               if (ret < 0)
-                       return ret;
-       }
+       ret = tsl2x7x_prox_cal(indio_dev);
+       if (ret < 0)
+               return ret;
 
        ret = tsl2x7x_invoke_change(indio_dev);
        if (ret < 0)
-- 
2.14.3

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