linux-kernel - Re: [PATCH] [v2] sound/soc/fsl/fsl_dma.c: add missing of_node

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Date:	Mon, 22 Aug 2011 21:05:38 +0100
From:	Liam Girdwood <lrg@...com>
To:	Timur Tabi <timur@...escale.com>
CC:	"kernel-janitors@...r.kernel.org" <kernel-janitors@...r.kernel.org>,
	"broonie@...nsource.wolfsonmicro.com" 
	<broonie@...nsource.wolfsonmicro.com>,
	"perex@...ex.cz" <perex@...ex.cz>, "tiwai@...e.de" <tiwai@...e.de>,
	"grant.likely@...retlab.ca" <grant.likely@...retlab.ca>,
	"alsa-devel@...a-project.org" <alsa-devel@...a-project.org>,
	"linuxppc-dev@...ts.ozlabs.org" <linuxppc-dev@...ts.ozlabs.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"devicetree-discuss@...ts.ozlabs.org" 
	<devicetree-discuss@...ts.ozlabs.org>,
	"julia@...u.dk" <julia@...u.dk>
Subject: Re: [PATCH] [v2] sound/soc/fsl/fsl_dma.c: add missing of_node_put

On 22/08/11 15:22, Timur Tabi wrote:
> of_parse_phandle increments the reference count of np, so this should be
> decremented before trying the next possibility.
> 
> Since we don't actually use np, we can decrement the reference count
> immediately.
> 
> Reported-by: Julia Lawall <julia@...u.dk>
> Signed-off-by: Timur Tabi <timur@...escale.com>

Acked-by: Liam Girdwood <lrg@...com>

> ---
>  sound/soc/fsl/fsl_dma.c |    2 ++
>  1 files changed, 2 insertions(+), 0 deletions(-)
> 
> diff --git a/sound/soc/fsl/fsl_dma.c b/sound/soc/fsl/fsl_dma.c
> index 6680c0b..b300f4b 100644
> --- a/sound/soc/fsl/fsl_dma.c
> +++ b/sound/soc/fsl/fsl_dma.c
> @@ -877,10 +877,12 @@ static struct device_node *find_ssi_node(struct device_node *dma_channel_np)
>  		 * assume that device_node pointers are a valid comparison.
>  		 */
>  		np = of_parse_phandle(ssi_np, "fsl,playback-dma", 0);
> +		of_node_put(np);
>  		if (np == dma_channel_np)
>  			return ssi_np;
>  
>  		np = of_parse_phandle(ssi_np, "fsl,capture-dma", 0);
> +		of_node_put(np);
>  		if (np == dma_channel_np)
>  			return ssi_np;
>  	}

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