Re: [PATCH v2 09/11] clk: imx: scu: fix kfree() of static memory on setting driver_override

[Krzysztof Kozlowski]

On 23/02/2022 20:14, Krzysztof Kozlowski wrote:
> The driver_override field from platform driver should not be initialized
> from static memory (string literal) because the core later kfree() it,
> for example when driver_override is set via sysfs.
> 
> Use dedicated helper to set driver_override properly.
> 
> Fixes: 77d8f3068c63 ("clk: imx: scu: add two cells binding support")
> Cc: <stable@xxxxxxxxxxxxxxx>
> Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@xxxxxxxxxxxxx>
> ---
>  drivers/clk/imx/clk-scu.c | 7 ++++++-
>  1 file changed, 6 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/clk/imx/clk-scu.c b/drivers/clk/imx/clk-scu.c
> index 083da31dc3ea..15e1d670e51f 100644
> --- a/drivers/clk/imx/clk-scu.c
> +++ b/drivers/clk/imx/clk-scu.c
> @@ -683,7 +683,12 @@ struct clk_hw *imx_clk_scu_alloc_dev(const char *name,
>  		return ERR_PTR(ret);
>  	}
>  
> -	pdev->driver_override = "imx-scu-clk";
> +	ret = driver_set_override(&pdev->dev, &pdev->driver_override,
> +				  "imx-scu-clk");
> +	if (ret) {
> +		platform_device_put(pdev);
> +		return ret;

This is wrong - should be ERR_PTR.


Best regards,
Krzysztof