Re: [PATCH] bus: fsl-mc: Fix an API misuse in fsl_mc_device_add()

[Greg KH <gregkh@linuxfoundation.org>]

On Mon, May 26, 2025 at 04:36:22PM +0800, Haoxiang Li wrote:
> In fsl_mc_device_add(), use put_device() to give up the
> device reference instead of kfree().
> 
> Fixes: bbf9d17d9875 ("staging: fsl-mc: Freescale Management Complex (fsl-mc) bus driver")
> Cc: stable@vger.kernel.org
> Signed-off-by: Haoxiang Li <haoxiang_li2024@163.com>
> ---
>  drivers/bus/fsl-mc/fsl-mc-bus.c | 4 +---
>  1 file changed, 1 insertion(+), 3 deletions(-)
> 
> diff --git a/drivers/bus/fsl-mc/fsl-mc-bus.c b/drivers/bus/fsl-mc/fsl-mc-bus.c
> index a8be8cf246fb..dfd79ecf65b6 100644
> --- a/drivers/bus/fsl-mc/fsl-mc-bus.c
> +++ b/drivers/bus/fsl-mc/fsl-mc-bus.c
> @@ -905,9 +905,7 @@ int fsl_mc_device_add(struct fsl_mc_obj_desc *obj_desc,
>  	return 0;
>  
>  error_cleanup_dev:
> -	kfree(mc_dev->regions);
> -	kfree(mc_bus);
> -	kfree(mc_dev);
> +	put_device(&mc_dev->dev);
>  
>  	return error;
>  }

No, sorry, this is not corrrect at all.  Always test your patches before
submitting them.

greg k-h