FE is connected to two BEs, BE1 is active, BE2 is deactive. When closing BE1, FE/BE1 is in HW_FREE state, then BE2 is startup by mixer runtime update.

For FE is in HW_FREE state, dpcm_run_update_startup() will skip BE2's startup because FE's state is HW_FREE, BE2 stays in FE's be_clients list.

During FE's closed, the dpcm_fe_dai_close() will close all related BEs, BE2 will be closed. This will lead to BE2's dpcm[stream].users mismatch.

We need disconnet all pending BEs in the corner case.

Signed-off-by: zhucancan zhucancan@vivo.com --- sound/soc/soc-pcm.c | 19 ++++++++++++++----- 1 file changed, 14 insertions(+), 5 deletions(-)

diff --git a/sound/soc/soc-pcm.c b/sound/soc/soc-pcm.c index dcab9527ba3d..04ad53f0ae4f 100644 --- a/sound/soc/soc-pcm.c +++ b/sound/soc/soc-pcm.c @@ -2451,8 +2451,11 @@ static int dpcm_run_update_startup(struct snd_soc_pcm_runtime *fe, int stream)

/* Only start the BE if the FE is ready */ if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_FREE || - fe->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE) - return -EINVAL; + fe->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE) { + dev_err(fe->dev, "ASoC: FE %s is not ready %d\n", + fe->dai_link->name, fe->dpcm[stream].state); + goto disconnect; + }

/* startup must always be called for new BEs */ ret = dpcm_be_dai_startup(fe, stream); @@ -2513,12 +2516,18 @@ static int dpcm_run_update_startup(struct snd_soc_pcm_runtime *fe, int stream) close: dpcm_be_dai_shutdown(fe, stream); disconnect: - /* disconnect any closed BEs */ + /* disconnect any pending BEs */ spin_lock_irqsave(&fe->card->dpcm_lock, flags); for_each_dpcm_be(fe, stream, dpcm) { struct snd_soc_pcm_runtime *be = dpcm->be; - if (be->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE) - dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE; + + /* is this op for this BE ? */ + if (!snd_soc_dpcm_be_can_update(fe, be, stream)) + continue; + + if (be->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE || + be->dpcm[stream].state == SND_SOC_DPCM_STATE_NEW) + dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE; } spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);