[alsa-devel] [PATCH] ASoC: core - fix module reference counting for CPU DAIs

[Liam Girdwood]

On 24/05/11 13:57, Girdwood, Liam wrote:
> Currently CODEC and platform drivers have their module reference count
> incremented soc_probe_dai_link() whilst CPU DAI drivers have their reference
> count incremented in soc_bind_dai_link().
> 
> CPU DAIs should have their reference count incremented in soc_probe_dai_link()
> just like the CODEC and platform drivers.
> 
> Signed-off-by: Liam Girdwood <lrg at ti.com>
> ---
>  sound/soc/soc-core.c |    9 +++++----
>  1 files changed, 5 insertions(+), 4 deletions(-)
> 
> diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c
> index 5968745..f051e85 100644
> --- a/sound/soc/soc-core.c
> +++ b/sound/soc/soc-core.c
> @@ -1306,10 +1306,6 @@ static int soc_bind_dai_link(struct snd_soc_card *card, int num)
>  	/* no, then find CPU DAI from registered DAIs*/
>  	list_for_each_entry(cpu_dai, &dai_list, list) {
>  		if (!strcmp(cpu_dai->name, dai_link->cpu_dai_name)) {
> -
> -			if (!try_module_get(cpu_dai->dev->driver->owner))
> -				return -ENODEV;
> -
>  			rtd->cpu_dai = cpu_dai;
>  			goto find_codec;
>  		}
> @@ -1621,12 +1617,17 @@ static int soc_probe_dai_link(struct snd_soc_card *card, int num)
>  	rtd->pmdown_time = pmdown_time;
>  
>  	/* probe the cpu_dai */
> +

gah - without the newline.

>  	if (!cpu_dai->probed) {
> +		if (!try_module_get(cpu_dai->dev->driver->owner))
> +			return -ENODEV;
> +
>  		if (cpu_dai->driver->probe) {
>  			ret = cpu_dai->driver->probe(cpu_dai);
>  			if (ret < 0) {
>  				printk(KERN_ERR "asoc: failed to probe CPU DAI %s\n",
>  						cpu_dai->name);
> +				module_put(cpu_dai->dev->driver->owner);
>  				return ret;
>  			}
>  		}