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Message-ID: <20160830183213.GA8478@Karyakshetra>
Date: Wed, 31 Aug 2016 00:02:14 +0530
From: Bhaktipriya Shridhar <bhaktipriya96@...il.com>
To: Liam Girdwood <lgirdwood@...il.com>,
Mark Brown <broonie@...nel.org>,
Jaroslav Kysela <perex@...ex.cz>, Takashi Iwai <tiwai@...e.com>
Cc: Tejun Heo <tj@...nel.org>, alsa-devel@...a-project.org,
linux-kernel@...r.kernel.org
Subject: [PATCH v2] ASoC: Remove deprecated create_singlethread_workqueue
The workqueue "dac33_wq" queues a single work item &dac33->work and hence
doesn't require ordering. Also, it is not being used on a memory reclaim
path. Hence, it has been converted to use system_wq.
The work item has been flushed in dac33_soc_remove to ensure that
there are no pending tasks while disconnecting the driver.
The workqueue "post_msg_wq" queues a single work item
&drv->ipc_post_msg_wq and hence doesn't require ordering. Also, it is
not being used on a memory reclaim path. Hence, it has been converted to
use system_wq.
The work item has been flushed in sst_context_cleanup to ensure that
there are no pending tasks while disconnecting the driver.
System workqueues have been able to handle high level of concurrency
for a long time now and hence it's not required to have a singlethreaded
workqueue just to gain concurrency. Unlike a dedicated per-cpu workqueue
created with create_singlethread_workqueue(), system_wq allows multiple
work items to overlap executions even on the same CPU; however, a
per-cpu workqueue doesn't have any CPU locality or global ordering
guarantee unless the target CPU is explicitly specified and thus the
increase of local concurrency shouldn't make any difference.
Signed-off-by: Bhaktipriya Shridhar <bhaktipriya96@...il.com>
---
Changes in v2:
- Fixed heading to indicate that changes were made in sound/soc
sound/soc/codecs/tlv320dac33.c | 17 ++++-------------
sound/soc/intel/atom/sst/sst.c | 14 +++++---------
2 files changed, 9 insertions(+), 22 deletions(-)
diff --git a/sound/soc/codecs/tlv320dac33.c b/sound/soc/codecs/tlv320dac33.c
index f7a6ce7..6822ac1 100644
--- a/sound/soc/codecs/tlv320dac33.c
+++ b/sound/soc/codecs/tlv320dac33.c
@@ -90,7 +90,6 @@ static const char *dac33_supply_names[DAC33_NUM_SUPPLIES] = {
struct tlv320dac33_priv {
struct mutex mutex;
- struct workqueue_struct *dac33_wq;
struct work_struct work;
struct snd_soc_codec *codec;
struct regulator_bulk_data supplies[DAC33_NUM_SUPPLIES];
@@ -771,7 +770,7 @@ static irqreturn_t dac33_interrupt_handler(int irq, void *dev)
/* Do not schedule the workqueue in Mode7 */
if (dac33->fifo_mode != DAC33_FIFO_MODE7)
- queue_work(dac33->dac33_wq, &dac33->work);
+ schedule_work(&dac33->work);
return IRQ_HANDLED;
}
@@ -1127,7 +1126,7 @@ static int dac33_pcm_trigger(struct snd_pcm_substream *substream, int cmd,
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
if (dac33->fifo_mode) {
dac33->state = DAC33_PREFILL;
- queue_work(dac33->dac33_wq, &dac33->work);
+ schedule_work(&dac33->work);
}
break;
case SNDRV_PCM_TRIGGER_STOP:
@@ -1135,7 +1134,7 @@ static int dac33_pcm_trigger(struct snd_pcm_substream *substream, int cmd,
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
if (dac33->fifo_mode) {
dac33->state = DAC33_FLUSH;
- queue_work(dac33->dac33_wq, &dac33->work);
+ schedule_work(&dac33->work);
}
break;
default:
@@ -1410,14 +1409,6 @@ static int dac33_soc_probe(struct snd_soc_codec *codec)
dac33->irq = -1;
}
if (dac33->irq != -1) {
- /* Setup work queue */
- dac33->dac33_wq =
- create_singlethread_workqueue("tlv320dac33");
- if (dac33->dac33_wq == NULL) {
- free_irq(dac33->irq, codec);
- return -ENOMEM;
- }
-
INIT_WORK(&dac33->work, dac33_work);
}
}
@@ -1437,7 +1428,7 @@ static int dac33_soc_remove(struct snd_soc_codec *codec)
if (dac33->irq >= 0) {
free_irq(dac33->irq, dac33->codec);
- destroy_workqueue(dac33->dac33_wq);
+ flush_work(&dac33->work);
}
return 0;
}
diff --git a/sound/soc/intel/atom/sst/sst.c b/sound/soc/intel/atom/sst/sst.c
index a4b458e..8cfd0cf 100644
--- a/sound/soc/intel/atom/sst/sst.c
+++ b/sound/soc/intel/atom/sst/sst.c
@@ -76,7 +76,7 @@ static irqreturn_t intel_sst_interrupt_mrfld(int irq, void *context)
spin_unlock(&drv->ipc_spin_lock);
/* we can send more messages to DSP so trigger work */
- queue_work(drv->post_msg_wq, &drv->ipc_post_msg_wq);
+ schedule_work(&drv->ipc_post_msg_wq);
retval = IRQ_HANDLED;
}
@@ -212,10 +212,6 @@ static int sst_workqueue_init(struct intel_sst_drv *ctx)
INIT_WORK(&ctx->ipc_post_msg_wq, sst_process_pending_msg);
init_waitqueue_head(&ctx->wait_queue);
- ctx->post_msg_wq =
- create_singlethread_workqueue("sst_post_msg_wq");
- if (!ctx->post_msg_wq)
- return -EBUSY;
return 0;
}
@@ -318,7 +314,6 @@ int sst_context_init(struct intel_sst_drv *ctx)
return 0;
do_free_mem:
- destroy_workqueue(ctx->post_msg_wq);
return ret;
}
EXPORT_SYMBOL_GPL(sst_context_init);
@@ -330,7 +325,7 @@ void sst_context_cleanup(struct intel_sst_drv *ctx)
sst_unregister(ctx->dev);
sst_set_fw_state_locked(ctx, SST_SHUTDOWN);
flush_scheduled_work();
- destroy_workqueue(ctx->post_msg_wq);
+ flush_work(&ctx->ipc_post_msg_wq);
pm_qos_remove_request(ctx->qos);
kfree(ctx->fw_sg_list.src);
kfree(ctx->fw_sg_list.dst);
@@ -414,7 +409,7 @@ static int intel_sst_runtime_suspend(struct device *dev)
sst_set_fw_state_locked(ctx, SST_RESET);
synchronize_irq(ctx->irq_num);
- flush_workqueue(ctx->post_msg_wq);
+ flush_work(&ctx->ipc_post_msg_wq);
ctx->ops->reset(ctx);
/* save the shim registers because PMC doesn't save state */
@@ -445,8 +440,9 @@ static int intel_sst_suspend(struct device *dev)
return -EBUSY;
}
}
+
synchronize_irq(ctx->irq_num);
- flush_workqueue(ctx->post_msg_wq);
+ flush_work(ctx->ipc_post_msg_wq);
/* Move the SST state to Reset */
sst_set_fw_state_locked(ctx, SST_RESET);
--
2.1.4
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