Re: [PATCH] soc: bcm: brcmstb: pm: pm-arm: Fix refcount leak in brcmstb_pm_probe

[Andy Shevchenko <andriy.shevchenko@linux.intel.com>]

On Thu, May 26, 2022 at 11:53:22AM +0400, Miaoqian Lin wrote:
> of_find_matching_node() returns a node pointer with refcount
> incremented, we should use of_node_put() on it when not need anymore.
> Add missing of_node_put() to avoid refcount leak.
> 
> In brcmstb_init_sram, it pass dn to of_address_to_resource(),
> of_address_to_resource() will call of_find_device_by_node() to take
> reference, so we should release the reference returned by
> of_find_matching_node().

Looks legit,
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>

> Fixes: 0b741b8234c8 ("soc: bcm: brcmstb: Add support for S2/S3/S5 suspend states (ARM)")
> Signed-off-by: Miaoqian Lin <linmq006@gmail.com>
> ---
>  drivers/soc/bcm/brcmstb/pm/pm-arm.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/soc/bcm/brcmstb/pm/pm-arm.c b/drivers/soc/bcm/brcmstb/pm/pm-arm.c
> index 3cbb165d6e30..70ad0f3dce28 100644
> --- a/drivers/soc/bcm/brcmstb/pm/pm-arm.c
> +++ b/drivers/soc/bcm/brcmstb/pm/pm-arm.c
> @@ -783,6 +783,7 @@ static int brcmstb_pm_probe(struct platform_device *pdev)
>  	}
>  
>  	ret = brcmstb_init_sram(dn);
> +	of_node_put(dn);
>  	if (ret) {
>  		pr_err("error setting up SRAM for PM\n");
>  		return ret;
> -- 
> 2.25.1
> 

-- 
With Best Regards,
Andy Shevchenko