Subject: [PATCH] ASoC: soc-pcm: fix BE dai not hw_free and shutdown during mixer update

[zhucancan]

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@xxxxxxxx>
---
 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);
 
-- 
2.21.0



2020-05-29

zhucancan