Re: [PATCH] staging: iio: cdc/ad7746: fix missing return value

[Jonathan Cameron]

On 25/10/16 16:56, Arnd Bergmann wrote:
> As found by "gcc -Wmaybe-uninitialized", the latest change to the
> driver lacked an initalization for the return code in one of the
> added cases:
> 
> drivers/staging/iio/cdc/ad7746.c: In function âad7746_read_rawâ:
> drivers/staging/iio/cdc/ad7746.c:655:2: error: âretâ may be used uninitialized in this function [-Werror=maybe-uninitialized]
> 
> This sets it to IIO_VAL_INT, which I think is what we want here.
> 
> Fixes: 2296c0623eb7 ("staging: iio: cdc: ad7746: implement IIO_CHAN_INFO_SAMP_FREQ")
> Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
Gah, not a good bit of reviewing from me. Should have caught that one.  Thanks Arnd.

Applied to the togreg branch of iio.git - initially pushed out as testing for the
autobuilders to play with it.  Will probably be a little while before I send
another pull to Greg (most likely the weekend)

Thanks again,

Jonathan
> ---
>  drivers/staging/iio/cdc/ad7746.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/staging/iio/cdc/ad7746.c b/drivers/staging/iio/cdc/ad7746.c
> index f41251ceeacd..a5828f9aa437 100644
> --- a/drivers/staging/iio/cdc/ad7746.c
> +++ b/drivers/staging/iio/cdc/ad7746.c
> @@ -642,6 +642,7 @@ static int ad7746_read_raw(struct iio_dev *indio_dev,
>  		case IIO_VOLTAGE:
>  			*val = ad7746_vt_filter_rate_table[
>  					(chip->config >> 6) & 0x3][0];
> +			ret = IIO_VAL_INT;
>  			break;
>  		default:
>  			ret = -EINVAL;
>