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staging:iio: prevent divide by zero bugs

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"val" is used as a divisor later, so we should check for zero here to
avoid a division by zero.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
This commit is contained in:
Dan Carpenter 2012-08-18 09:48:00 +01:00 committed by Jonathan Cameron
parent 95d1c8c7e2
commit 50d4b3062d
6 changed files with 12 additions and 0 deletions
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2
drivers/staging/iio/adc/ad7192.c
View File

@ -647,6 +647,8 @@ static ssize_t ad7192_write_frequency(struct device *dev,
ret = strict_strtoul(buf, 10, &lval);
if (ret)
return ret;
if (lval == 0)
return -EINVAL;
mutex_lock(&indio_dev->mlock);
if (iio_buffer_enabled(indio_dev)) {

2
drivers/staging/iio/gyro/adis16260_core.c
View File

@ -195,6 +195,8 @@ static ssize_t adis16260_write_frequency(struct device *dev,
ret = strict_strtol(buf, 10, &val);
if (ret)
return ret;
if (val == 0)
return -EINVAL;
mutex_lock(&indio_dev->mlock);
if (spi_get_device_id(st->us)) {

2
drivers/staging/iio/imu/adis16400_core.c
View File

@ -234,6 +234,8 @@ static ssize_t adis16400_write_frequency(struct device *dev,
ret = strict_strtol(buf, 10, &val);
if (ret)
return ret;
if (val == 0)
return -EINVAL;
mutex_lock(&indio_dev->mlock);

2
drivers/staging/iio/meter/ade7753.c
View File

@ -425,6 +425,8 @@ static ssize_t ade7753_write_frequency(struct device *dev,
ret = strict_strtol(buf, 10, &val);
if (ret)
return ret;
if (val == 0)
return -EINVAL;
mutex_lock(&indio_dev->mlock);

2
drivers/staging/iio/meter/ade7754.c
View File

@ -445,6 +445,8 @@ static ssize_t ade7754_write_frequency(struct device *dev,
ret = strict_strtol(buf, 10, &val);
if (ret)
return ret;
if (val == 0)
return -EINVAL;
mutex_lock(&indio_dev->mlock);

2
drivers/staging/iio/meter/ade7759.c
View File

@ -385,6 +385,8 @@ static ssize_t ade7759_write_frequency(struct device *dev,
ret = strict_strtol(buf, 10, &val);
if (ret)
return ret;
if (val == 0)
return -EINVAL;
mutex_lock(&indio_dev->mlock);