[alsa-devel] [PATCH 1/4] snd-usb-caiaq: Do not disable local interrupts

[Daniel Mack]

On Fri, Sep 25, 2009 at 04:22:15PM +0100, Mark Hills wrote:
> The driver documentation states that local interrupts are already
> disabled when trigger() is called, so only a spinlock is required.

Hmm. I assume you tested them well. But I remember to have had quite
some trouble at this point on SMP machines and ended up with that
irqsave code. However, if you're sure that fixes a bug or is not
necessary, let's take the patches and I'll test them once I'm back home
around mid Oct.

Btw - your Signed-off-by: is missing on all of them :)

Thanks,
Daniel


> ---
>  sound/usb/caiaq/audio.c |    5 ++---
>  1 files changed, 2 insertions(+), 3 deletions(-)
> 
> diff --git a/sound/usb/caiaq/audio.c b/sound/usb/caiaq/audio.c
> index 121af06..ce193a5 100644
> --- a/sound/usb/caiaq/audio.c
> +++ b/sound/usb/caiaq/audio.c
> @@ -72,15 +72,14 @@ static void
>  deactivate_substream(struct snd_usb_caiaqdev *dev,
>  		     struct snd_pcm_substream *sub)
>  {
> -	unsigned long flags;
> -	spin_lock_irqsave(&dev->spinlock, flags);
> +	spin_lock(&dev->spinlock);
>  
>  	if (sub->stream == SNDRV_PCM_STREAM_PLAYBACK)
>  		dev->sub_playback[sub->number] = NULL;
>  	else
>  		dev->sub_capture[sub->number] = NULL;
>  
> -	spin_unlock_irqrestore(&dev->spinlock, flags);
> +	spin_unlock(&dev->spinlock);
>  }
>  
>  static int
> -- 
> 1.6.4.4
>