ALSA: hda - Use standard workqueue for unsol and jack events

The events that are handled by HD-audio drivers are no frequent and
urgent ones, so we can use the standard workqueue without any problem
nowadays.
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/pci/hda/hda_codec.c

@@ -681,7 +681,7 @@ int snd_hda_queue_unsol_event(struct hda_bus *bus, u32 res, u32 res_ex)
 	struct hda_bus_unsolicited *unsol;
 	unsigned int wp;
 
-	if (!bus || !bus->workq)
+	if (!bus)
 		return 0;
 
 	trace_hda_unsol_event(bus, res, res_ex);
@@ -693,7 +693,7 @@ int snd_hda_queue_unsol_event(struct hda_bus *bus, u32 res, u32 res_ex)
 	unsol->queue[wp] = res;
 	unsol->queue[wp + 1] = res_ex;
 
-	queue_work(bus->workq, &unsol->work);
+	schedule_work(&unsol->work);
 
 	return 0;
 }
@@ -732,13 +732,9 @@ static void snd_hda_bus_free(struct hda_bus *bus)
 		return;
 
 	WARN_ON(!list_empty(&bus->codec_list));
-	if (bus->workq)
-		flush_workqueue(bus->workq);
+	cancel_work_sync(&bus->unsol.work);
 	if (bus->ops.private_free)
 		bus->ops.private_free(bus);
-	if (bus->workq)
-		destroy_workqueue(bus->workq);
-
 	kfree(bus);
 }
 
@@ -785,16 +781,6 @@ int snd_hda_bus_new(struct snd_card *card,
 	INIT_LIST_HEAD(&bus->codec_list);
 	INIT_WORK(&bus->unsol.work, process_unsol_events);
 
-	snprintf(bus->workq_name, sizeof(bus->workq_name),
-		 "hd-audio%d", card->number);
-	bus->workq = create_singlethread_workqueue(bus->workq_name);
-	if (!bus->workq) {
-		dev_err(card->dev, "cannot create workqueue %s\n",
-			   bus->workq_name);
-		kfree(bus);
-		return -ENOMEM;
-	}
-
 	err = snd_device_new(card, SNDRV_DEV_BUS, bus, &dev_ops);
 	if (err < 0) {
 		snd_hda_bus_free(bus);
@@ -1068,8 +1054,8 @@ static void hda_jackpoll_work(struct work_struct *work)
 	if (!codec->jackpoll_interval)
 		return;
 
-	queue_delayed_work(codec->bus->workq, &codec->jackpoll_work,
-			   codec->jackpoll_interval);
+	schedule_delayed_work(&codec->jackpoll_work,
+			      codec->jackpoll_interval);
 }
 
 static void init_hda_cache(struct hda_cache_rec *cache,
@@ -1178,7 +1164,6 @@ static void codec_release_pcms(struct hda_codec *codec)
 void snd_hda_codec_cleanup_for_unbind(struct hda_codec *codec)
 {
 	cancel_delayed_work_sync(&codec->jackpoll_work);
-	flush_workqueue(codec->bus->workq);
 	if (!codec->in_freeing)
 		snd_hda_ctls_clear(codec);
 	codec_release_pcms(codec);
@@ -1214,7 +1199,6 @@ static void snd_hda_codec_free(struct hda_codec *codec)
 	if (device_is_registered(hda_codec_dev(codec)))
 		device_del(hda_codec_dev(codec));
 	free_init_pincfgs(codec);
-	flush_workqueue(codec->bus->workq);
 	list_del(&codec->list);
 	codec->bus->caddr_tbl[codec->addr] = NULL;
 	clear_bit(codec->addr, &codec->bus->codec_powered);

sound/pci/hda/hda_codec.h

@@ -132,8 +132,6 @@ struct hda_bus {
 
 	/* unsolicited event queue */
 	struct hda_bus_unsolicited unsol;
-	char workq_name[16];
-	struct workqueue_struct *workq;	/* common workqueue for codecs */
 
 	/* assigned PCMs */
 	DECLARE_BITMAP(pcm_dev_bits, SNDRV_PCM_DEVICES);

sound/pci/hda/hda_intel.c

@@ -528,10 +528,10 @@ static int azx_position_check(struct azx *chip, struct azx_dev *azx_dev)
 	if (ok == 1) {
 		azx_dev->irq_pending = 0;
 		return ok;
-	} else if (ok == 0 && chip->bus && chip->bus->workq) {
+	} else if (ok == 0) {
 		/* bogus IRQ, process it later */
 		azx_dev->irq_pending = 1;
-		queue_work(chip->bus->workq, &hda->irq_pending_work);
+		schedule_work(&hda->irq_pending_work);
 	}
 	return 0;
 }
@@ -893,8 +893,8 @@ static int azx_runtime_resume(struct device *dev)
 	if (status && bus) {
 		list_for_each_entry(codec, &bus->codec_list, list)
 			if (status & (1 << codec->addr))
-				queue_delayed_work(codec->bus->workq,
-						   &codec->jackpoll_work, codec->jackpoll_interval);
+				schedule_delayed_work(&codec->jackpoll_work,
+						      codec->jackpoll_interval);
 	}
 
 	/* disable controller Wake Up event*/

sound/pci/hda/patch_ca0132.c

@@ -4410,8 +4410,7 @@ static void hp_callback(struct hda_codec *codec, struct hda_jack_callback *cb)
 	 * state machine run.
 	 */
 	cancel_delayed_work_sync(&spec->unsol_hp_work);
-	queue_delayed_work(codec->bus->workq, &spec->unsol_hp_work,
-			   msecs_to_jiffies(500));
+	schedule_delayed_work(&spec->unsol_hp_work, msecs_to_jiffies(500));
 	cb->tbl->block_report = 1;
 }
 

sound/pci/hda/patch_hdmi.c

@@ -1576,9 +1576,8 @@ static bool hdmi_present_sense(struct hdmi_spec_per_pin *per_pin, int repoll)
 			update_eld = true;
 		}
 		else if (repoll) {
-			queue_delayed_work(codec->bus->workq,
-					   &per_pin->work,
-					   msecs_to_jiffies(300));
+			schedule_delayed_work(&per_pin->work,
+					      msecs_to_jiffies(300));
 			goto unlock;
 		}
 	}
@@ -2198,11 +2197,10 @@ static void generic_hdmi_free(struct hda_codec *codec)
 	for (pin_idx = 0; pin_idx < spec->num_pins; pin_idx++) {
 		struct hdmi_spec_per_pin *per_pin = get_pin(spec, pin_idx);
 
-		cancel_delayed_work(&per_pin->work);
+		cancel_delayed_work_sync(&per_pin->work);
 		eld_proc_free(per_pin);
 	}
 
-	flush_workqueue(codec->bus->workq);
 	hdmi_array_free(spec);
 	kfree(spec);
 }

sound/pci/hda/patch_via.c

@@ -222,8 +222,7 @@ static void vt1708_update_hp_work(struct hda_codec *codec)
 		if (!spec->hp_work_active) {
 			codec->jackpoll_interval = msecs_to_jiffies(100);
 			snd_hda_codec_write(codec, 0x1, 0, 0xf81, 0);
-			queue_delayed_work(codec->bus->workq,
-					   &codec->jackpoll_work, 0);
+			schedule_delayed_work(&codec->jackpoll_work, 0);
 			spec->hp_work_active = true;
 		}
 	} else if (!hp_detect_with_aa(codec))