[ALSA] soc - Use global workqueue

Use global workqueue for simplicity instead of own workqueue
in SoC core and wm8750 codes.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>

sound/soc/codecs/wm8750.c

@@ -51,7 +51,6 @@
 #define warn(format, arg...) \
 	printk(KERN_WARNING AUDIO_NAME ": " format "\n" , ## arg)
 
-static struct workqueue_struct *wm8750_workq = NULL;
 static struct work_struct wm8750_dapm_work;
 
 /*
@@ -1039,7 +1038,7 @@ static int wm8750_resume(struct platform_device *pdev)
 	if (codec->suspend_dapm_state == SNDRV_CTL_POWER_D0) {
 		wm8750_dapm_event(codec, SNDRV_CTL_POWER_D2);
 		codec->dapm_state = SNDRV_CTL_POWER_D0;
-		queue_delayed_work(wm8750_workq, &wm8750_dapm_work,
+		schedule_delayed_work(&wm8750_dapm_work,
 			 msecs_to_jiffies(1000));
 	}
 
@@ -1084,8 +1083,7 @@ static int wm8750_init(struct snd_soc_device *socdev)
 	/* charge output caps */
 	wm8750_dapm_event(codec, SNDRV_CTL_POWER_D2);
 	codec->dapm_state = SNDRV_CTL_POWER_D3hot;
-	queue_delayed_work(wm8750_workq, &wm8750_dapm_work,
-		msecs_to_jiffies(1000));
+	schedule_delayed_work(&wm8750_dapm_work, msecs_to_jiffies(1000));
 
 	/* set the update bits */
 	reg = wm8750_read_reg_cache(codec, WM8750_LDAC);
@@ -1228,11 +1226,6 @@ static int wm8750_probe(struct platform_device *pdev)
 	INIT_LIST_HEAD(&codec->dapm_paths);
 	wm8750_socdev = socdev;
 	INIT_WORK(&wm8750_dapm_work, wm8750_work, codec);
-	wm8750_workq = create_workqueue("wm8750");
-	if (wm8750_workq == NULL) {
-		kfree(codec);
-		return -ENOMEM;
-	}
 #if defined (CONFIG_I2C) || defined (CONFIG_I2C_MODULE)
 	if (setup->i2c_address) {
 		normal_i2c[0] = setup->i2c_address;
@@ -1256,8 +1249,7 @@ static int wm8750_remove(struct platform_device *pdev)
 
 	if (codec->control_data)
 		wm8750_dapm_event(codec, SNDRV_CTL_POWER_D3cold);
-	if (wm8750_workq)
-		destroy_workqueue(wm8750_workq);
+	flush_scheduled_work();
 	snd_soc_free_pcms(socdev);
 	snd_soc_dapm_free(socdev);
 #if defined (CONFIG_I2C) || defined (CONFIG_I2C_MODULE)

sound/soc/soc-core.c

@@ -59,7 +59,6 @@
 
 static DEFINE_MUTEX(pcm_mutex);
 static DEFINE_MUTEX(io_mutex);
-static struct workqueue_struct *soc_workq;
 static DECLARE_WAIT_QUEUE_HEAD(soc_pm_waitq);
 
 /* supported sample rates */
@@ -810,7 +809,7 @@ static int soc_codec_close(struct snd_pcm_substream *substream)
 	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 		/* start delayed pop wq here for playback streams */
 		rtd->codec_dai->pop_wait = 1;
-		queue_delayed_work(soc_workq, &socdev->delayed_work,
+		schedule_delayed_work(&socdev->delayed_work,
 			msecs_to_jiffies(pmdown_time));
 	} else {
 		/* capture streams can be powered down now */
@@ -1102,7 +1101,7 @@ static int soc_suspend(struct platform_device *pdev, pm_message_t state)
 	}
 
 	/* close any waiting streams and save state */
-	flush_workqueue(soc_workq);
+	flush_scheduled_work();
 	codec->suspend_dapm_state = codec->dapm_state;
 
 	for(i = 0; i < codec->num_dai; i++) {
@@ -1227,16 +1226,9 @@ static int soc_probe(struct platform_device *pdev)
 	}
 
 	/* DAPM stream work */
-	soc_workq = create_workqueue("kdapm");
-	if (soc_workq == NULL)
-		goto work_err;
 	INIT_DELAYED_WORK(&socdev->delayed_work, close_delayed_work);
 	return 0;
 
-work_err:
-	if (platform->remove)
-		platform->remove(pdev);
-
 platform_err:
 	if (codec_dev->remove)
 		codec_dev->remove(pdev);
@@ -1263,9 +1255,6 @@ static int soc_remove(struct platform_device *pdev)
 	struct snd_soc_platform *platform = socdev->platform;
 	struct snd_soc_codec_device *codec_dev = socdev->codec_dev;
 
-	if (soc_workq)
-		destroy_workqueue(soc_workq);
-
 	if (platform->remove)
 		platform->remove(pdev);