[alsa-devel] [PATCH 1/1] ALSA: core: Fix regression for ELD/codec information files

[Takashi Iwai]

At Wed, 13 May 2015 16:36:33 +0800,
han.lu at intel.com wrote:
> 
> From: "Lu, Han" <han.lu at intel.com>
> 
> The commit c560a6797e3b ("ALSA: core: Remove child proc file elements
> recursively") introduced a regression that ELD/codec information files
> can not be found on /proc/asound/cardX/. This patch corrects it.
> 
> Signed-off-by: Lu, Han <han.lu at intel.com>

This doesn't fix correctly since snd_card_proc_new() isn't the place
to create the real proc file entry.  It should be created at the
device registration time.

I'm going to post the fix patch series.


thanks,

Takashi

> 
> diff --git a/include/sound/info.h b/include/sound/info.h
> index 1626995..ae8d30a 100644
> --- a/include/sound/info.h
> +++ b/include/sound/info.h
> @@ -149,6 +149,10 @@ static inline int snd_card_proc_new(struct snd_card *card, const char *name,
>  				    struct snd_info_entry **entryp)
>  {
>  	*entryp = snd_info_create_card_entry(card, name, card->proc_root);
> +	if (snd_info_register(*entryp) < 0) {
> +		snd_info_free_entry(*entryp);
> +		*entryp = NULL;
> +	}
>  	return *entryp ? 0 : -ENOMEM;
>  }
>  
> -- 
> 1.9.1
>