[PATCH 2/5] powerpc/83xx: fix possible object reference leak

[Christophe Leroy]

Le 22/03/2019 à 04:05, Wen Yang a écrit :
> The call to of_find_node_by_name returns a node pointer with refcount
> incremented thus it must be explicitly decremented after the last
> usage.
> 
> Detected by coccinelle with the following warnings:
> ./arch/powerpc/platforms/83xx/km83xx.c:68:2-8: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 59, but without a corresponding object release within this function.

This was fixed by 
https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/commit/?id=88654d5b4476

> 
> Signed-off-by: Wen Yang <wen.yang99 at zte.com.cn>
> Cc: Scott Wood <oss at buserror.net>
> Cc: Kumar Gala <galak at kernel.crashing.org>
> Cc: Benjamin Herrenschmidt <benh at kernel.crashing.org>
> Cc: Paul Mackerras <paulus at samba.org>
> Cc: Michael Ellerman <mpe at ellerman.id.au>
> Cc: linuxppc-dev at lists.ozlabs.org
> Cc: linux-kernel at vger.kernel.org
> ---
>   arch/powerpc/platforms/83xx/km83xx.c | 1 +
>   1 file changed, 1 insertion(+)
> 
> diff --git a/arch/powerpc/platforms/83xx/km83xx.c b/arch/powerpc/platforms/83xx/km83xx.c
> index d8642a4..11eea7c 100644
> --- a/arch/powerpc/platforms/83xx/km83xx.c
> +++ b/arch/powerpc/platforms/83xx/km83xx.c
> @@ -65,6 +65,7 @@ static void quirk_mpc8360e_qe_enet10(void)
>   	ret = of_address_to_resource(np_par, 0, &res);
>   	if (ret) {
>   		pr_warn("%s couldn;t map par_io registers\n", __func__);
> +		of_node_put(np_par);
>   		return;
>   	}
>