On 10/11/16 03:16, Guenter Roeck wrote:
> On Wed, Nov 9, 2016 at 3:12 PM, Colin King <colin.king@xxxxxxxxxxxxx> wrote:
>> From: Colin Ian King <colin.king@xxxxxxxxxxxxx>
>>
>> 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.king@xxxxxxxxxxxxx>
>
> Good catch!
>
> Fixes: 974e6f02e27e ("iio: cros_ec_sensors_core: Add common functions
> for the ChromeOS EC Sensor Hub")
> Reviewed-by: Guenter Roeck <groeck@xxxxxxxxxxxx>
Thanks and applied to the togreg branch of iio.git - shortly to be
pushed out as testing for the autobuilders to take a look at it.
Jonathan
>
> 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
>>
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