Hi Corentin,
On Tue, Aug 16, 2016 at 2:10 PM, LABBE Corentin
<clabbe.montjoie@xxxxxxxxx> wrote:
> of_match_device could return NULL, and so cause a NULL pointer
> dereference later.
>
> For fixing this problem, we use of_device_get_match_data(), this will
> simplify the code a little by using a standard function for
> getting the match data.
>
> Reported-by: coverity (CID 1127209)
> Signed-off-by: LABBE Corentin <clabbe.montjoie@xxxxxxxxx>
> ---
> drivers/iio/adc/mxs-lradc.c | 8 +++-----
> 1 file changed, 3 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/iio/adc/mxs-lradc.c b/drivers/iio/adc/mxs-lradc.c
> index b84d37c..378547c 100644
> --- a/drivers/iio/adc/mxs-lradc.c
> +++ b/drivers/iio/adc/mxs-lradc.c
> @@ -1570,10 +1570,7 @@ static int mxs_lradc_probe_touchscreen(struct mxs_lradc *lradc,
>
> static int mxs_lradc_probe(struct platform_device *pdev)
> {
> - const struct of_device_id *of_id =
> - of_match_device(mxs_lradc_dt_ids, &pdev->dev);
> - const struct mxs_lradc_of_config *of_cfg =
> - &mxs_lradc_of_config[(enum mxs_lradc_id)of_id->data];
> + const struct mxs_lradc_of_config *of_cfg;
> struct device *dev = &pdev->dev;
> struct device_node *node = dev->of_node;
> struct mxs_lradc *lradc;
> @@ -1591,7 +1588,8 @@ static int mxs_lradc_probe(struct platform_device *pdev)
> }
>
> lradc = iio_priv(iio);
> - lradc->soc = (enum mxs_lradc_id)of_id->data;
> + lradc->soc = (enum mxs_lradc_id)of_device_get_match_data(&pdev->dev);
> + of_cfg = &mxs_lradc_of_config[lradc->soc];
>
> /* Grab the memory area */
> iores = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> --
This driver has been split into adc, touchscreen and mfd part. It's currently in
process of review and not yet merged. And it's modified in such a way that
your changes wouldn't apply anyway. Please see:
https://lkml.org/lkml/2016/8/4/270
I think it's better to wait for modified driver to be merged and after send
patches for it.
Thanks,
Ksenija
--
To unsubscribe from this list: send the line "unsubscribe linux-iio" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
