linux-kernel - Re: [PATCH] powerpc/pseries: Fix of_node_put() underflow during pseries remove

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Message-ID: <20170724005627.GF3717@umbus.fritz.box>
Date:   Mon, 24 Jul 2017 10:56:27 +1000
From:   David Gibson <david@...son.dropbear.id.au>
To:     Laurent Vivier <lvivier@...hat.com>
Cc:     linux-kernel@...r.kernel.org,
        Michael Ellerman <mpe@...erman.id.au>,
        linuxppc-dev@...ts.ozlabs.org,
        Tyrel Datwyler <tyreld@...ux.vnet.ibm.com>,
        Thomas Huth <thuth@...hat.com>
Subject: Re: [PATCH] powerpc/pseries: Fix of_node_put() underflow during
 pseries remove

On Fri, Jul 21, 2017 at 04:51:39PM +0200, Laurent Vivier wrote:
> As for commit 68baf692c435 ("powerpc/pseries: Fix of_node_put()
> underflow during DLPAR remove"), the call to of_node_put()
> must be removed from pSeries_reconfig_remove_node().
> 
> dlpar_detach_node() and pSeries_reconfig_remove_node() call
> of_detach_node(), and thus the node should not be released
> in this case too.
> 
> Signed-off-by: Laurent Vivier <lvivier@...hat.com>

Reviewed-by: David Gibson <david@...son.dropbear.id.au>

> ---
>  arch/powerpc/platforms/pseries/reconfig.c | 1 -
>  1 file changed, 1 deletion(-)
> 
> diff --git a/arch/powerpc/platforms/pseries/reconfig.c b/arch/powerpc/platforms/pseries/reconfig.c
> index e5bf1e8..011ef21 100644
> --- a/arch/powerpc/platforms/pseries/reconfig.c
> +++ b/arch/powerpc/platforms/pseries/reconfig.c
> @@ -82,7 +82,6 @@ static int pSeries_reconfig_remove_node(struct device_node *np)
>  
>  	of_detach_node(np);
>  	of_node_put(parent);
> -	of_node_put(np); /* Must decrement the refcount */
>  	return 0;
>  }
>  

-- 
David Gibson			| I'll have my music baroque, and my code
david AT gibson.dropbear.id.au	| minimalist, thank you.  NOT _the_ _other_
				| _way_ _around_!
http://www.ozlabs.org/~dgibson

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