[alsa-devel] [PATCH] ASoC: audio-graph-card: add missing const at graph_get_dai_id()

[wen.yang99 at zte.com.cn]

> From: Kuninori Morimoto <kuninori.morimoto.gx at renesas.com>
> 
> commit c152f8491a8d9 ("ASoC: audio-graph-card: fix an use-after-free in
> graph_get_dai_id()") fixups use-after-free issue,
> but, it need to use "const" for reg. This patch adds it.
> 
> We will have below without this patch
> 
> LINUX/sound/soc/generic/audio-graph-card.c: In function 'graph_get_dai_id':
> LINUX/sound/soc/generic/audio-graph-card.c:87:7: warning: assignment discards\
> 'const' qualifier from pointer target type [-Wdiscarded-qualifiers]
> reg = of_get_property(node, "reg", NULL);
> 
> Fixes: c152f8491a8d9 ("ASoC: audio-graph-card: fix an use-after-free in graph_get_dai_id()")
> Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx at renesas.com>
> ---
> sound/soc/generic/audio-graph-card.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/sound/soc/generic/audio-graph-card.c b/sound/soc/generic/audio-graph-card.c
> index 343ede8..ebf2ca3 100644
> --- a/sound/soc/generic/audio-graph-card.c
> +++ b/sound/soc/generic/audio-graph-card.c
> @@ -63,7 +63,7 @@ static int graph_get_dai_id(struct device_node *ep)
> struct device_node *endpoint;
> struct of_endpoint info;
> int i, id;
> -    u32 *reg;
> +    const u32 *reg;
> int ret;
> 
> /* use driver specified DAI ID if exist */
> --
> 2.7.4

Thanks.
Acked-by: Wen Yang <wen.yang99 at zte.com.cn>

---
Best regards
Wen