On Wed, Nov 9, 2016 at 3:12 PM, Colin King <colin.k...@canonical.com> wrote:
> From: Colin Ian King <colin.k...@canonical.com>
>
> status is a u8 hence the check if status is less than zero has no effect.
> Fix this by replacing status with int ret so the less than zero compare
> will correctly detect errors.
>
> Issue found with static analysis with CoverityScan, CID 1375919
>
> Signed-off-by: Colin Ian King <colin.k...@canonical.com>
Good catch!
Fixes: 974e6f02e27e ("iio: cros_ec_sensors_core: Add common functions
for the ChromeOS EC Sensor Hub")
Reviewed-by: Guenter Roeck <gro...@chromium.org>
For the benefit of others, this is in today's linux-next.
Thanks,
Guenter
> ---
> drivers/iio/common/cros_ec_sensors/cros_ec_sensors_core.c | 8 ++++----
> 1 file changed, 4 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/iio/common/cros_ec_sensors/cros_ec_sensors_core.c
> b/drivers/iio/common/cros_ec_sensors/cros_ec_sensors_core.c
> index a3be799..416cae5 100644
> --- a/drivers/iio/common/cros_ec_sensors/cros_ec_sensors_core.c
> +++ b/drivers/iio/common/cros_ec_sensors/cros_ec_sensors_core.c
> @@ -291,15 +291,15 @@ int cros_ec_sensors_read_lpc(struct iio_dev *indio_dev,
> return -EIO;
>
> /* Read status byte until EC is not busy. */
> - status = cros_ec_sensors_read_until_not_busy(st);
> - if (status < 0)
> - return status;
> + ret = cros_ec_sensors_read_until_not_busy(st);
> + if (ret < 0)
> + return ret;
>
> /*
> * Store the current sample id so that we can compare to the
> * sample id after reading the data.
> */
> - samp_id = status & EC_MEMMAP_ACC_STATUS_SAMPLE_ID_MASK;
> + samp_id = ret & EC_MEMMAP_ACC_STATUS_SAMPLE_ID_MASK;
>
> /* Read all EC data, format it, and store it into data. */
> ret = cros_ec_sensors_read_data_unsafe(indio_dev, scan_mask,
> --
> 2.10.2
>
