On 01/02/2018 at 16:30:22 +0530, Himanshu Jha wrote:
> In scpsys_probe function, return value of of_match_device function which
> returns null is dereferenced without checking. Therefore, add a check for
> potential null dereference.
>
> Detected by CoverityScan, CID#1424087 "Dereference null return value"
>
No, this will never happen as the only way to probe this device is to
use device tree.
> Fixes: commit 53fddb1a66dd ("soc: mediatek: reduce code duplication of
> scpsys_probe across all SoCs")
> Signed-off-by: Himanshu Jha <himanshujha199...@gmail.com>
> ---
> drivers/soc/mediatek/mtk-scpsys.c | 3 +++
> 1 file changed, 3 insertions(+)
>
> diff --git a/drivers/soc/mediatek/mtk-scpsys.c
> b/drivers/soc/mediatek/mtk-scpsys.c
> index 435ce5e..6e7f196 100644
> --- a/drivers/soc/mediatek/mtk-scpsys.c
> +++ b/drivers/soc/mediatek/mtk-scpsys.c
> @@ -981,6 +981,9 @@ static int scpsys_probe(struct platform_device *pdev)
> int i, ret;
>
> match = of_match_device(of_scpsys_match_tbl, &pdev->dev);
> + if (!match)
> + return -EINVAL;
> +
> soc = (const struct scp_soc_data *)match->data;
>
> scp = init_scp(pdev, soc->domains, soc->num_domains, &soc->regs,
> --
> 2.7.4
>
>
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--
Alexandre Belloni, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com
