diff options
| author |   Qiao Zhou <zhouqiao@marvell.com> | 2014-12-03 10:13:43 +0800 |
|---|---|---|
| committer |   Mark Brown <broonie@kernel.org> | 2014-12-04 22:41:58 +0000 |
| commit | 36fba62cce8184ea6a0cecfa43f07f712716a6f8 (patch) | |
| tree | 9ccbbb4e3b4834c61046d52646c24f457f44fce7 /sound/soc/soc-pcm.c | |
| parent | Linux 3.18-rc1 (diff) | |
| download | linux-dev-36fba62cce8184ea6a0cecfa43f07f712716a6f8.tar.xz linux-dev-36fba62cce8184ea6a0cecfa43f07f712716a6f8.zip | |
ASoC: soc-pcm: do not hw_free BE if it's still used
Do not free BE hw if it's still used by other FE during dpcm runtime
shutdown. Otherwise the BE runtime state will be STATE_HW_FREE and
won't be updated to STATE_CLOSE when shutdown ends, because BE dai
shutdown function won't close pcm when detecting BE is still under
use. With STATE_HW_FREE, BE can't be triggered start again.
This corner case can easily appear when one BE is used by two FE,
without this patch "ASoC: dpcm: Fix race between FE/BE updates and
trigger"(ea9d0d771fcd32cd56070819749477d511ec9117). One FE tries to
shutdown but it's raced against xrun on another FE. It improves the
be dai hw_free logic.
Signed-off-by: Qiao Zhou <zhouqiao@marvell.com>
Acked-by: Liam Girdwood <liam.r.girdwood@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'sound/soc/soc-pcm.c')
| -rw-r--r-- | sound/soc/soc-pcm.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/sound/soc/soc-pcm.c b/sound/soc/soc-pcm.c index 002311afdeaa..84357193c044 100644 --- a/sound/soc/soc-pcm.c +++ b/sound/soc/soc-pcm.c @@ -1641,6 +1641,10 @@ int dpcm_be_dai_hw_free(struct snd_soc_pcm_runtime *fe, int stream) if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream)) continue; + /* do not free hw if this BE is used by other FE */ + if (be->dpcm[stream].users > 1) + continue; + if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) && (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) && |