Re: [PATCH] ACPI: LPSS: Fix missing check in register_device_clock

[Rafael J. Wysocki]

On Thu, Jun 23, 2022 at 3:21 PM huhai <15815827059@xxxxxxx> wrote:
>
> From: huhai <huhai@xxxxxxxxxx>
>
> register_device_clock() misses a check for platform_device_register_simple().
> Add a check to fix it.
>
> Signed-off-by: huhai <huhai@xxxxxxxxxx>
> ---
>  drivers/acpi/acpi_lpss.c | 3 +++
>  1 file changed, 3 insertions(+)
>
> diff --git a/drivers/acpi/acpi_lpss.c b/drivers/acpi/acpi_lpss.c
> index fbe0756259c5..c4d4d21391d7 100644
> --- a/drivers/acpi/acpi_lpss.c
> +++ b/drivers/acpi/acpi_lpss.c
> @@ -422,6 +422,9 @@ static int register_device_clock(struct acpi_device *adev,
>         if (!lpss_clk_dev)
>                 lpt_register_clock_device();
>
> +       if (IS_ERR(lpss_clk_dev))
> +               return PTR_ERR(lpss_clk_dev);
> +

Why not use IS_ERR_OR_NULL() instead?

>         clk_data = platform_get_drvdata(lpss_clk_dev);
>         if (!clk_data)
>                 return -ENODEV;
> --
> 2.27.0
>
>
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