[alsa-devel] [PATCH 1/2] ASoC: Acknowledge WM8996 interrupts before acting on them

[Liam Girdwood]

On 20/07/11 13:50, Mark Brown wrote:
> This closes the small race between a status being read in response to an
> interrupt and clearing the interrupt, meaning that if the status changes
> between those periods we might not get a reassertion of the interrupt.
> 
> Signed-off-by: Mark Brown <broonie at opensource.wolfsonmicro.com>
> ---
>  sound/soc/codecs/wm8996.c |    9 ++++-----
>  1 files changed, 4 insertions(+), 5 deletions(-)
> 
> diff --git a/sound/soc/codecs/wm8996.c b/sound/soc/codecs/wm8996.c
> index 00f9ace..ab8e9d1 100644
> --- a/sound/soc/codecs/wm8996.c
> +++ b/sound/soc/codecs/wm8996.c
> @@ -2404,6 +2404,8 @@ static irqreturn_t wm8996_irq(int irq, void *data)
>  	}
>  	irq_val &= ~snd_soc_read(codec, WM8996_INTERRUPT_STATUS_2_MASK);
>  
> +	snd_soc_write(codec, WM8996_INTERRUPT_STATUS_2, irq_val);
> +
>  	if (irq_val & (WM8996_DCS_DONE_01_EINT | WM8996_DCS_DONE_23_EINT)) {
>  		dev_dbg(codec->dev, "DC servo IRQ\n");
>  		complete(&wm8996->dcs_done);
> @@ -2420,13 +2422,10 @@ static irqreturn_t wm8996_irq(int irq, void *data)
>  	if (irq_val & WM8996_MICD_EINT)
>  		wm8996_micd(codec);
>  
> -	if (irq_val) {
> -		snd_soc_write(codec, WM8996_INTERRUPT_STATUS_2, irq_val);
> -
> +	if (irq_val)
>  		return IRQ_HANDLED;
> -	} else {
> +	else
>  		return IRQ_NONE;
> -	}
>  }
>  
>  static irqreturn_t wm8996_edge_irq(int irq, void *data)

Both

Acked-by: Liam Girdwood <lrg at ti.com>