linux-kernel - Re: [PATCH] powerpc/kexec_file: Add of_node

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Date:   Mon, 18 Oct 2021 12:37:06 +0530
From:   Hari Bathini <hbathini@...ux.ibm.com>
To:     Wan Jiabing <wanjiabing@...o.com>,
        Michael Ellerman <mpe@...erman.id.au>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        Rob Herring <robh@...nel.org>,
        Thiago Jung Bauermann <bauerman@...ux.ibm.com>,
        Lakshmi Ramasubramanian <nramas@...ux.microsoft.com>,
        Sourabh Jain <sourabhjain@...ux.ibm.com>,
        linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org
Cc:     kael_w@...h.net
Subject: Re: [PATCH] powerpc/kexec_file: Add of_node_put() before goto



On 18/10/21 7:24 am, Wan Jiabing wrote:
> Fix following coccicheck warning:
> ./arch/powerpc/kexec/file_load_64.c:698:1-22: WARNING: Function
> for_each_node_by_type should have of_node_put() before goto
> 
> Early exits from for_each_node_by_type should decrement the
> node reference counter.
> 
> Signed-off-by: Wan Jiabing <wanjiabing@...o.com>

Thanks for fixing this!

Acked-by: Hari Bathini <hbathini@...ux.ibm.com>

> ---
>   arch/powerpc/kexec/file_load_64.c | 1 +
>   1 file changed, 1 insertion(+)
> 
> diff --git a/arch/powerpc/kexec/file_load_64.c b/arch/powerpc/kexec/file_load_64.c
> index 5056e175ca2c..b4981b651d9a 100644
> --- a/arch/powerpc/kexec/file_load_64.c
> +++ b/arch/powerpc/kexec/file_load_64.c
> @@ -700,6 +700,7 @@ static int update_usable_mem_fdt(void *fdt, struct crash_mem *usable_mem)
>   		if (ret) {
>   			pr_err("Failed to set linux,usable-memory property for %s node",
>   			       dn->full_name);
> +			of_node_put(dn);
>   			goto out;
>   		}
>   	}
>