Re: [PATCH] staging: iio: ad9832:

Eva Rachel Retuya
2016-11-19T11:47:52Z

On Sat, Nov 19, 2016 at 12:08:34PM +0100, Christophe JAILLET wrote:
> Commit a98461d79ba5 ("staging: iio: ad9832: add DVDD regulator") and
> commit 43a07e48af44 ("staging: iio: ad9832: clean-up regulator 'reg'") add
> some dereference of 'st' which is an un-initialized pointer at this point.
>
> Re-order code and tweak error handling in order to allocate memory and have
> 'st' be a valid pointer before using it.

Hello,

Thanks for the patch but this fix was already submitted and applied:
https://git.kernel.org/cgit/linux/kernel/git/jic23/iio.git/commit/?h=testing&idh26fdbd2e207f8107e65c5a372ac616e7af11b4

Eva

>
> Fixes: a98461d79ba5 ("staging: iio: ad9832: add DVDD regulator")
> Fixes: 43a07e48af44 ("staging: iio: ad9832: clean-up regulator 'reg'")
>
> Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
> ---
> Compile tested only
> ---
> drivers/staging/iio/frequency/ad9832.c | 19 +++++++++----------
> 1 file changed, 9 insertions(+), 10 deletions(-)
>
> diff --git a/drivers/staging/iio/frequency/ad9832.c b/drivers/staging/iio/frequency/ad9832.c
> index 639047fade30..16894836f982 100644
> --- a/drivers/staging/iio/frequency/ad9832.c
> +++ b/drivers/staging/iio/frequency/ad9832.c
> @@ -211,6 +211,15 @@ static int ad9832_probe(struct spi_device *spi)
> return -ENODEV;
> }
>
> + indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*st));
> + if (!indio_dev)
> + return -ENOMEM;
> +
> + spi_set_drvdata(spi, indio_dev);
> + st = iio_priv(indio_dev);
> + st->mclk = pdata->mclk;
> + st->spi = spi;
> +
> st->avdd = devm_regulator_get(&spi->dev, "avdd");
> if (IS_ERR(st->avdd))
> return PTR_ERR(st->avdd);
> @@ -233,16 +242,6 @@ static int ad9832_probe(struct spi_device *spi)
> goto error_disable_avdd;
> }
>
> - indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*st));
> - if (!indio_dev) {
> - ret = -ENOMEM;
> - goto error_disable_dvdd;
> - }
> - spi_set_drvdata(spi, indio_dev);
> - st = iio_priv(indio_dev);
> - st->mclk = pdata->mclk;
> - st->spi = spi;
> -
> indio_dev->dev.parent = &spi->dev;
> indio_dev->name = spi_get_device_id(spi)->name;
> indio_dev->info = &ad9832_info;
> --
> 2.9.3
>