FE state is SND_SOC_DPCM_STATE_PREPARE now, BE1 is used by FE.
Later when new BE2 is added to FE by mixer update, it will call dpcm_run_update_startup() to update BE2's state, but unfortunately BE2 .prepare() meets error, it will disconnect all non started BE.
This make BE1 dai skip .hw_free() and .shutdown(), and the BE1 users will never decrease to zero.
Signed-off-by: zhucancan zhucancan@vivo.com --- re-format patch content v2 --- sound/soc/soc-pcm.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/sound/soc/soc-pcm.c b/sound/soc/soc-pcm.c index 1f302de44052..df34422bd0dd 100644 --- a/sound/soc/soc-pcm.c +++ b/sound/soc/soc-pcm.c @@ -2730,12 +2730,12 @@ static int dpcm_run_update_startup(struct snd_soc_pcm_runtime *fe, int stream) close: dpcm_be_dai_shutdown(fe, stream); disconnect: - /* disconnect any non started BEs */ + /* disconnect any closed 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_START) - dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE; + if (be->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE) + dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE; } spin_unlock_irqrestore(&fe->card->dpcm_lock, flags);