From: Keyon Jie yang.jie@linux.intel.com
There could be more than one thread read/write the dsp_power_state simultaneously (e.g. hda_dsp_d0i3_work and sof_ipc_tx_message), add a mutex power_state_access to make sure the access to it is mutually exclusive.
Signed-off-by: Keyon Jie yang.jie@linux.intel.com Reviewed-by: Ranjani Sridharan ranjani.sridharan@linux.intel.com Reviewed-by: Bard Liao bard.liao@intel.com Reviewed-by: Guennadi Liakhovetski guennadi.liakhovetski@linux.intel.com Signed-off-by: Kai Vehmanen kai.vehmanen@linux.intel.com --- sound/soc/sof/core.c | 1 + sound/soc/sof/ops.h | 11 ++++++++--- sound/soc/sof/sof-priv.h | 2 ++ 3 files changed, 11 insertions(+), 3 deletions(-)
diff --git a/sound/soc/sof/core.c b/sound/soc/sof/core.c index adc7c37145d6..2b85ef5d6092 100644 --- a/sound/soc/sof/core.c +++ b/sound/soc/sof/core.c @@ -316,6 +316,7 @@ int snd_sof_device_probe(struct device *dev, struct snd_sof_pdata *plat_data) INIT_LIST_HEAD(&sdev->route_list); spin_lock_init(&sdev->ipc_lock); spin_lock_init(&sdev->hw_lock); + mutex_init(&sdev->power_state_access);
if (IS_ENABLED(CONFIG_SND_SOC_SOF_PROBE_WORK_QUEUE)) INIT_WORK(&sdev->probe_work, sof_probe_work); diff --git a/sound/soc/sof/ops.h b/sound/soc/sof/ops.h index 95e748b36903..4c1f9daaa6e8 100644 --- a/sound/soc/sof/ops.h +++ b/sound/soc/sof/ops.h @@ -208,11 +208,16 @@ static inline int snd_sof_dsp_set_power_state(struct snd_sof_dev *sdev, const struct sof_dsp_power_state *target_state) { + int ret = 0; + + mutex_lock(&sdev->power_state_access); + if (sof_ops(sdev)->set_power_state) - return sof_ops(sdev)->set_power_state(sdev, target_state); + ret = sof_ops(sdev)->set_power_state(sdev, target_state);
- /* D0 substate is not supported, do nothing here. */ - return 0; + mutex_unlock(&sdev->power_state_access); + + return ret; }
/* debug */ diff --git a/sound/soc/sof/sof-priv.h b/sound/soc/sof/sof-priv.h index 68da8f797403..28d19fa30614 100644 --- a/sound/soc/sof/sof-priv.h +++ b/sound/soc/sof/sof-priv.h @@ -375,6 +375,8 @@ struct snd_sof_dev {
/* current DSP power state */ struct sof_dsp_power_state dsp_power_state; + /* mutex to protect the dsp_power_state access */ + struct mutex power_state_access;
/* Intended power target of system suspend */ enum sof_system_suspend_state system_suspend_target;