[alsa-devel] [PATCH] a52: Ignore start request if we're already running

[Takashi Iwai]

At Wed, 12 Nov 2014 15:55:43 +0100,
David Henningsson wrote:
> 
> When trying to start a PCM that's already running, the result is EBADFD.
> We might have implicitly started the buffer by filling it up,
> so just ignore this request if we're already running.
> 
> Reported-by: Chow Loong Jin <hyperair at ubuntu.com>
> Signed-off-by: David Henningsson <david.henningsson at canonical.com>

Thanks, applied.


Takashi

> ---
>  a52/pcm_a52.c | 6 ++++++
>  1 file changed, 6 insertions(+)
> 
> diff --git a/a52/pcm_a52.c b/a52/pcm_a52.c
> index b467ec8..59e25cb 100644
> --- a/a52/pcm_a52.c
> +++ b/a52/pcm_a52.c
> @@ -482,6 +482,12 @@ static int a52_start(snd_pcm_ioplug_t *io)
>  {
>  	struct a52_ctx *rec = io->private_data;
>  
> +	/* When trying to start a PCM that's already running, the result is
> +	   EBADFD. We might have implicitly started the buffer by filling it
> +	   up, so just ignore this request if we're already running. */
> +	if (snd_pcm_state(rec->slave) == SND_PCM_STATE_RUNNING)
> +		return 0;
> +
>  	return snd_pcm_start(rec->slave);
>  }
>  
> -- 
> 1.9.1
>