[alsa-devel] [PATCH] ASoC: rt5514: Support the DSP recording continuously after the hotwording triggered

[Mark Brown]

On Thu, Jul 13, 2017 at 02:01:51AM +0000, Oder Chiou wrote:
> > > +static irqreturn_t rt5514_spi_irq(int irq, void *data) {
> > > +	struct rt5514_dsp *rt5514_dsp = data;
> > > +
> > > +	schedule_work(&rt5514_dsp->start_work);
> > > +
> > > +	return IRQ_HANDLED;
> > > +}

> > Why not just use a threaded interrupt handler for the start_work?
> > That'd get you into process context.

> Because of the SPI related function the work thread should be manipulated
> by the interrupt handler function. If the SPI related function is
> implemented to the interrupt handler directly, it will cause the runtime
> error while the interrupt handler is triggered.

Why will this cause an error?  
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