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ASoC: stm32: sai: fix stop management in isr 

Add check on substream validity.

Signed-off-by: Olivier Moysan <olivier.moysan@st.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Olivier Moysan 2017-10-19 15:03:20 +02:00 committed by Mark Brown
parent 2bd6bf03f4
commit d807cdfb48
1 changed files with 8 additions and 4 deletions
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12
sound/soc/stm/stm32_sai_sub.c
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@ -184,7 +184,6 @@ static const struct regmap_config stm32_sai_sub_regmap_config_h7 = {
static irqreturn_t stm32_sai_isr(int irq, void *devid)
{
struct stm32_sai_sub_data *sai = (struct stm32_sai_sub_data *)devid;
struct snd_pcm_substream *substream = sai->substream;
struct platform_device *pdev = sai->pdev;
unsigned int sr, imr, flags;
snd_pcm_state_t status = SNDRV_PCM_STATE_RUNNING;
@ -199,6 +198,11 @@ static irqreturn_t stm32_sai_isr(int irq, void *devid)
regmap_update_bits(sai->regmap, STM_SAI_CLRFR_REGX, SAI_XCLRFR_MASK,
SAI_XCLRFR_MASK);
if (!sai->substream) {
dev_err(&pdev->dev, "Device stopped. Spurious IRQ 0x%x\n", sr);
return IRQ_NONE;
}
if (flags & SAI_XIMR_OVRUDRIE) {
dev_err(&pdev->dev, "IRQ %s\n",
STM_SAI_IS_PLAYBACK(sai) ? "underrun" : "overrun");
@ -227,9 +231,9 @@ static irqreturn_t stm32_sai_isr(int irq, void *devid)
}
if (status != SNDRV_PCM_STATE_RUNNING) {
snd_pcm_stream_lock(substream);
snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
snd_pcm_stream_unlock(substream);
snd_pcm_stream_lock(sai->substream);
snd_pcm_stop(sai->substream, SNDRV_PCM_STATE_XRUN);
snd_pcm_stream_unlock(sai->substream);
}
return IRQ_HANDLED;