4.4-stable review patch. If anyone has any objections, please let me know.
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From: Kai Chieh Chuang kaichieh.chuang@mediatek.com
[ Upstream commit 9c0ac70ad24d76b873c1551e27790c7f6a815d5c ]
In case, one BE is used by two FE1/FE2 FE1--->BE--> | FE2----] when FE1/FE2 call dpcm_be_dai_hw_free() together the BE users will be 2 (> 1), hence cannot be hw_free the be state will leave at, ex. SND_SOC_DPCM_STATE_STOP
later FE1/FE2 call dpcm_be_dai_shutdown(), will be skip due to wrong state. leaving the BE not being hw_free and shutdown.
The BE dai will be hw_free later when calling dpcm_be_dai_shutdown() if still in invalid state.
Signed-off-by: KaiChieh Chuang kaichieh.chuang@mediatek.com Signed-off-by: Mark Brown broonie@kernel.org Signed-off-by: Sasha Levin alexander.levin@microsoft.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- sound/soc/soc-pcm.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-)
--- a/sound/soc/soc-pcm.c +++ b/sound/soc/soc-pcm.c @@ -1682,8 +1682,10 @@ int dpcm_be_dai_shutdown(struct snd_soc_ continue;
if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) && - (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)) - continue; + (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)) { + soc_pcm_hw_free(be_substream); + be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE; + }
dev_dbg(be->dev, "ASoC: close BE %s\n", dpcm->fe->dai_link->name);