On 09/04/2017 06:27 PM, Jonathan Cameron wrote:
> On Mon, 4 Sep 2017 18:00:48 +0300
> Dragos Bogdan <dragos.bogdan@xxxxxxxxxx> wrote:
>
>> The serial interface can be reset by writing 32 consecutive 1s to the device.
>> The value of 'ret' is overwritten when ad7793_check_platform_data() is called,
>> so it should be initialized to -1 only before doing the spi_write().
>>
>> Fixes: commit 2edb769d246e ("iio:ad7793: Add support for the ad7798 and ad7799")
>>
>> Signed-off-by: Dragos Bogdan <dragos.bogdan@xxxxxxxxxx>
> Hi Dragos,
>
> I'd prefer we introduced a separate variable. Using ret for this
> is what got us into trouble in the first place.
>
> Would you mind respining with that change?
>
> Thanks,
>
> Jonathan
Hi Jonathan,
I agree with your suggestion. I'll change it accordingly in v2.
Thanks,
Dragos
>> ---
>> drivers/iio/adc/ad7793.c | 3 ++-
>> 1 file changed, 2 insertions(+), 1 deletion(-)
>>
>> diff --git a/drivers/iio/adc/ad7793.c b/drivers/iio/adc/ad7793.c
>> index e6706a09e100..8680abf72dd2 100644
>> --- a/drivers/iio/adc/ad7793.c
>> +++ b/drivers/iio/adc/ad7793.c
>> @@ -257,7 +257,7 @@ static int ad7793_setup(struct iio_dev *indio_dev,
>> unsigned int vref_mv)
>> {
>> struct ad7793_state *st = iio_priv(indio_dev);
>> - int i, ret = -1;
>> + int i, ret;
>> unsigned long long scale_uv;
>> u32 id;
>>
>> @@ -266,6 +266,7 @@ static int ad7793_setup(struct iio_dev *indio_dev,
>> return ret;
>>
>> /* reset the serial interface */
>> + ret = -1;
>> ret = spi_write(st->sd.spi, (u8 *)&ret, sizeof(ret));
>> if (ret < 0)
>> goto out;
>
>
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