Re: [PATCH next] pinctrl: amd: isp411: Fix IS_ERR() vs NULL check in probe()

[Nirujogi, Pratap]

Hi Dan,

Thanks for the fix. I have missed earlier that PTR_ERR() casts NULL to 
0, which kernel treats it as success and not valid in this case.

Thanks,
Pratap


On 3/10/2025 6:52 AM, Dan Carpenter wrote:
> Caution: This message originated from an External Source. Use proper caution when opening attachments, clicking links, or responding.
>
>
> The platform_get_resource() returns NULL on error.  It doesn't
> return error pointers.  Fix the error checking to match.
>
> Fixes: e97435ab09f3 ("pinctrl: amd: isp411: Add amdisp GPIO pinctrl")
> Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
> ---
>   drivers/pinctrl/pinctrl-amdisp.c | 4 ++--
>   1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/pinctrl/pinctrl-amdisp.c b/drivers/pinctrl/pinctrl-amdisp.c
> index ce21ed84b929..9256ed67bb20 100644
> --- a/drivers/pinctrl/pinctrl-amdisp.c
> +++ b/drivers/pinctrl/pinctrl-amdisp.c
> @@ -183,8 +183,8 @@ static int amdisp_pinctrl_probe(struct platform_device *pdev)
>          pdev->dev.init_name = DRV_NAME;
>
>          res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> -       if (IS_ERR(res))
> -               return PTR_ERR(res);
> +       if (!res)
> +               return -EINVAL;
>
>          pctrl->gpiobase = devm_ioremap_resource(&pdev->dev, res);
>          if (IS_ERR(pctrl->gpiobase))
> --
> 2.47.2