Merge tag 'sound-fix-4.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound

Pull sound fixes from Takashi Iwai:
 "Most of the commits are trivial cleanup patches, while one commit is a
  significant fix for the race at ALSA sequencer that was spotted by
  syzkaller"

* tag 'sound-fix-4.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
  ALSA: seq: Cancel pending autoload work at unbinding device
  ALSA: firewire: Use common error handling code in snd_motu_stream_start_duplex()
  ALSA: asihpi: Kill BUG_ON() usages
  ALSA: core: Use %pS printk format for direct addresses
  ALSA: ymfpci: Use common error handling code in snd_ymfpci_create()
  ALSA: ymfpci: Use common error handling code in snd_card_ymfpci_probe()
  ALSA: 6fire: Use common error handling code in usb6fire_chip_probe()
  ALSA: usx2y: Use common error handling code in submit_urbs()
  ALSA: us122l: Use common error handling code in us122l_create_card()
  ALSA: hdspm: Use common error handling code in snd_hdspm_probe()
  ALSA: rme9652: Use common code in hdsp_get_iobox_version()
  ALSA: maestro3: Use common error handling code in two functions

12 files changed, 141 insertions, 149 deletions

diff --git a/sound/core/device.c b/sound/core/device.c
index 8918838b1999..cb0e46f66cc9 100644
--- a/sound/core/device.c
+++ b/sound/core/device.c
@@ -128,7 +128,7 @@ void snd_device_disconnect(struct snd_card *card, void *device_data)
 	if (dev)
 		__snd_device_disconnect(dev);
 	else
-		dev_dbg(card->dev, "device disconnect %p (from %pF), not found\n",
+		dev_dbg(card->dev, "device disconnect %p (from %pS), not found\n",
 			device_data, __builtin_return_address(0));
 }
 EXPORT_SYMBOL_GPL(snd_device_disconnect);
@@ -152,7 +152,7 @@ void snd_device_free(struct snd_card *card, void *device_data)
 	if (dev)
 		__snd_device_free(dev);
 	else
-		dev_dbg(card->dev, "device free %p (from %pF), not found\n",
+		dev_dbg(card->dev, "device free %p (from %pS), not found\n",
 			device_data, __builtin_return_address(0));
 }
 EXPORT_SYMBOL(snd_device_free);
diff --git a/sound/core/seq_device.c b/sound/core/seq_device.c
index c4acf17e9f5e..e40a2cba5002 100644
--- a/sound/core/seq_device.c
+++ b/sound/core/seq_device.c
@@ -148,8 +148,10 @@ void snd_seq_device_load_drivers(void)
 	flush_work(&autoload_work);
 }
 EXPORT_SYMBOL(snd_seq_device_load_drivers);
+#define cancel_autoload_drivers()	cancel_work_sync(&autoload_work)
 #else
 #define queue_autoload_drivers() /* NOP */
+#define cancel_autoload_drivers() /* NOP */
 #endif
 
 /*
@@ -159,6 +161,7 @@ static int snd_seq_device_dev_free(struct snd_device *device)
 {
 	struct snd_seq_device *dev = device->device_data;
 
+	cancel_autoload_drivers();
 	put_device(&dev->dev);
 	return 0;
 }
diff --git a/sound/firewire/motu/motu-stream.c b/sound/firewire/motu/motu-stream.c
index dc5541c8b359..73e7a5e527fc 100644
--- a/sound/firewire/motu/motu-stream.c
+++ b/sound/firewire/motu/motu-stream.c
@@ -253,24 +253,21 @@ int snd_motu_stream_start_duplex(struct snd_motu *motu, unsigned int rate)
 		if (err < 0) {
 			dev_err(&motu->unit->device,
 				"fail to start isochronous comm: %d\n", err);
-			stop_both_streams(motu);
-			return err;
+			goto stop_streams;
 		}
 
 		err = start_isoc_ctx(motu, &motu->rx_stream);
 		if (err < 0) {
 			dev_err(&motu->unit->device,
 				"fail to start IT context: %d\n", err);
-			stop_both_streams(motu);
-			return err;
+			goto stop_streams;
 		}
 
 		err = protocol->switch_fetching_mode(motu, true);
 		if (err < 0) {
 			dev_err(&motu->unit->device,
 				"fail to enable frame fetching: %d\n", err);
-			stop_both_streams(motu);
-			return err;
+			goto stop_streams;
 		}
 	}
 
@@ -281,12 +278,15 @@ int snd_motu_stream_start_duplex(struct snd_motu *motu, unsigned int rate)
 			dev_err(&motu->unit->device,
 				"fail to start IR context: %d", err);
 			amdtp_stream_stop(&motu->rx_stream);
-			stop_both_streams(motu);
-			return err;
+			goto stop_streams;
 		}
 	}
 
 	return 0;
+
+stop_streams:
+	stop_both_streams(motu);
+	return err;
 }
 
 void snd_motu_stream_stop_duplex(struct snd_motu *motu)
diff --git a/sound/pci/asihpi/asihpi.c b/sound/pci/asihpi/asihpi.c
index 976a3d23557e..70d023a85bf5 100644
--- a/sound/pci/asihpi/asihpi.c
+++ b/sound/pci/asihpi/asihpi.c
@@ -558,12 +558,10 @@ static void snd_card_asihpi_pcm_int_start(struct snd_pcm_substream *substream)
 	struct snd_card_asihpi_pcm *dpcm;
 	struct snd_card_asihpi *card;
 
-	BUG_ON(!substream);
-
 	dpcm = (struct snd_card_asihpi_pcm *)substream->runtime->private_data;
 	card = snd_pcm_substream_chip(substream);
 
-	BUG_ON(in_interrupt());
+	WARN_ON(in_interrupt());
 	tasklet_disable(&card->t);
 	card->llmode_streampriv = dpcm;
 	tasklet_enable(&card->t);
@@ -578,8 +576,6 @@ static void snd_card_asihpi_pcm_int_stop(struct snd_pcm_substream *substream)
 	struct snd_card_asihpi_pcm *dpcm;
 	struct snd_card_asihpi *card;
 
-	BUG_ON(!substream);
-
 	dpcm = (struct snd_card_asihpi_pcm *)substream->runtime->private_data;
 	card = snd_pcm_substream_chip(substream);
 
diff --git a/sound/pci/maestro3.c b/sound/pci/maestro3.c
index 97ac80af4447..8f20dec97843 100644
--- a/sound/pci/maestro3.c
+++ b/sound/pci/maestro3.c
@@ -2622,22 +2622,18 @@ snd_m3_create(struct snd_card *card, struct pci_dev *pci,
 
 	err = request_firmware(&chip->assp_kernel_image,
 			       "ess/maestro3_assp_kernel.fw", &pci->dev);
-	if (err < 0) {
-		snd_m3_free(chip);
-		return err;
-	}
+	if (err < 0)
+		goto free_chip;
 
 	err = request_firmware(&chip->assp_minisrc_image,
 			       "ess/maestro3_assp_minisrc.fw", &pci->dev);
-	if (err < 0) {
-		snd_m3_free(chip);
-		return err;
-	}
+	if (err < 0)
+		goto free_chip;
+
+	err = pci_request_regions(pci, card->driver);
+	if (err < 0)
+		goto free_chip;
 
-	if ((err = pci_request_regions(pci, card->driver)) < 0) {
-		snd_m3_free(chip);
-		return err;
-	}
 	chip->iobase = pci_resource_start(pci, 0);
 	
 	/* just to be sure */
@@ -2655,8 +2651,8 @@ snd_m3_create(struct snd_card *card, struct pci_dev *pci,
 	if (request_irq(pci->irq, snd_m3_interrupt, IRQF_SHARED,
 			KBUILD_MODNAME, chip)) {
 		dev_err(card->dev, "unable to grab IRQ %d\n", pci->irq);
-		snd_m3_free(chip);
-		return -ENOMEM;
+		err = -ENOMEM;
+		goto free_chip;
 	}
 	chip->irq = pci->irq;
 
@@ -2666,10 +2662,9 @@ snd_m3_create(struct snd_card *card, struct pci_dev *pci,
 		dev_warn(card->dev, "can't allocate apm buffer\n");
 #endif
 
-	if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) {
-		snd_m3_free(chip);
-		return err;
-	}
+	err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops);
+	if (err < 0)
+		goto free_chip;
 
 	if ((err = snd_m3_mixer(chip)) < 0)
 		return err;
@@ -2699,6 +2694,10 @@ snd_m3_create(struct snd_card *card, struct pci_dev *pci,
 	*chip_ret = chip;
 
 	return 0; 
+
+free_chip:
+	snd_m3_free(chip);
+	return err;
 }
 
 /*
@@ -2741,23 +2740,19 @@ snd_m3_probe(struct pci_dev *pci, const struct pci_device_id *pci_id)
 		break;
 	}
 
-	if ((err = snd_m3_create(card, pci,
-				 external_amp[dev],
-				 amp_gpio[dev],
-				 &chip)) < 0) {
-		snd_card_free(card);
-		return err;
-	}
+	err = snd_m3_create(card, pci, external_amp[dev], amp_gpio[dev], &chip);
+	if (err < 0)
+		goto free_card;
+
 	card->private_data = chip;
 
 	sprintf(card->shortname, "ESS %s PCI", card->driver);
 	sprintf(card->longname, "%s at 0x%lx, irq %d",
 		card->shortname, chip->iobase, chip->irq);
 
-	if ((err = snd_card_register(card)) < 0) {
-		snd_card_free(card);
-		return err;
-	}
+	err = snd_card_register(card);
+	if (err < 0)
+		goto free_card;
 
 #if 0 /* TODO: not supported yet */
 	/* TODO enable MIDI IRQ and I/O */
@@ -2772,6 +2767,10 @@ snd_m3_probe(struct pci_dev *pci, const struct pci_device_id *pci_id)
 	pci_set_drvdata(pci, card);
 	dev++;
 	return 0;
+
+free_card:
+	snd_card_free(card);
+	return err;
 }
 
 static void snd_m3_remove(struct pci_dev *pci)
diff --git a/sound/pci/rme9652/hdsp.c b/sound/pci/rme9652/hdsp.c
index 0ff41f9ab434..9f0f73875f01 100644
--- a/sound/pci/rme9652/hdsp.c
+++ b/sound/pci/rme9652/hdsp.c
@@ -793,11 +793,8 @@ static int hdsp_get_iobox_version (struct hdsp *hdsp)
 
 		hdsp_write(hdsp, HDSP_control2Reg, HDSP_S200 | HDSP_PROGRAM);
 		hdsp_write (hdsp, HDSP_fifoData, 0);
-		if (hdsp_fifo_wait(hdsp, 0, HDSP_SHORT_WAIT) < 0) {
-			hdsp->io_type = Multiface;
-			dev_info(hdsp->card->dev, "Multiface found\n");
-			return 0;
-		}
+		if (hdsp_fifo_wait(hdsp, 0, HDSP_SHORT_WAIT) < 0)
+			goto set_multi;
 
 		hdsp_write(hdsp, HDSP_control2Reg, HDSP_S_LOAD);
 		hdsp_write(hdsp, HDSP_fifoData, 0);
@@ -810,20 +807,14 @@ static int hdsp_get_iobox_version (struct hdsp *hdsp)
 		hdsp_write(hdsp, HDSP_control2Reg, HDSP_S300);
 		hdsp_write(hdsp, HDSP_control2Reg, HDSP_S_LOAD);
 		hdsp_write(hdsp, HDSP_fifoData, 0);
-		if (hdsp_fifo_wait(hdsp, 0, HDSP_SHORT_WAIT) == 0) {
-			hdsp->io_type = Multiface;
-			dev_info(hdsp->card->dev, "Multiface found\n");
-			return 0;
-		}
+		if (hdsp_fifo_wait(hdsp, 0, HDSP_SHORT_WAIT) == 0)
+			goto set_multi;
 
 		hdsp_write(hdsp, HDSP_control2Reg, HDSP_S300);
 		hdsp_write(hdsp, HDSP_control2Reg, HDSP_S_LOAD);
 		hdsp_write(hdsp, HDSP_fifoData, 0);
-		if (hdsp_fifo_wait(hdsp, 0, HDSP_SHORT_WAIT) < 0) {
-			hdsp->io_type = Multiface;
-			dev_info(hdsp->card->dev, "Multiface found\n");
-			return 0;
-		}
+		if (hdsp_fifo_wait(hdsp, 0, HDSP_SHORT_WAIT) < 0)
+			goto set_multi;
 
 		hdsp->io_type = RPM;
 		dev_info(hdsp->card->dev, "RPM found\n");
@@ -838,6 +829,11 @@ static int hdsp_get_iobox_version (struct hdsp *hdsp)
 			hdsp->io_type = Digiface;
 	}
 	return 0;
+
+set_multi:
+	hdsp->io_type = Multiface;
+	dev_info(hdsp->card->dev, "Multiface found\n");
+	return 0;
 }
 
 
diff --git a/sound/pci/rme9652/hdspm.c b/sound/pci/rme9652/hdspm.c
index 25284d8d9758..f20d42714e4d 100644
--- a/sound/pci/rme9652/hdspm.c
+++ b/sound/pci/rme9652/hdspm.c
@@ -6949,10 +6949,8 @@ static int snd_hdspm_probe(struct pci_dev *pci,
 	hdspm->pci = pci;
 
 	err = snd_hdspm_create(card, hdspm);
-	if (err < 0) {
-		snd_card_free(card);
-		return err;
-	}
+	if (err < 0)
+		goto free_card;
 
 	if (hdspm->io_type != MADIface) {
 		snprintf(card->shortname, sizeof(card->shortname), "%s_%x",
@@ -6970,15 +6968,17 @@ static int snd_hdspm_probe(struct pci_dev *pci,
 	}
 
 	err = snd_card_register(card);
-	if (err < 0) {
-		snd_card_free(card);
-		return err;
-	}
+	if (err < 0)
+		goto free_card;
 
 	pci_set_drvdata(pci, card);
 
 	dev++;
 	return 0;
+
+free_card:
+	snd_card_free(card);
+	return err;
 }
 
 static void snd_hdspm_remove(struct pci_dev *pci)
diff --git a/sound/pci/ymfpci/ymfpci.c b/sound/pci/ymfpci/ymfpci.c
index 4faf3e1ed06a..eafdee384059 100644
--- a/sound/pci/ymfpci/ymfpci.c
+++ b/sound/pci/ymfpci/ymfpci.c
@@ -268,10 +268,9 @@ static int snd_card_ymfpci_probe(struct pci_dev *pci,
 	if ((err = snd_ymfpci_create(card, pci,
 				     old_legacy_ctrl,
 			 	     &chip)) < 0) {
-		snd_card_free(card);
 		release_and_free_resource(mpu_res);
 		release_and_free_resource(fm_res);
-		return err;
+		goto free_card;
 	}
 	chip->fm_res = fm_res;
 	chip->mpu_res = mpu_res;
@@ -283,35 +282,31 @@ static int snd_card_ymfpci_probe(struct pci_dev *pci,
 		card->shortname,
 		chip->reg_area_phys,
 		chip->irq);
-	if ((err = snd_ymfpci_pcm(chip, 0)) < 0) {
-		snd_card_free(card);
-		return err;
-	}
-	if ((err = snd_ymfpci_pcm_spdif(chip, 1)) < 0) {
-		snd_card_free(card);
-		return err;
-	}
+	err = snd_ymfpci_pcm(chip, 0);
+	if (err < 0)
+		goto free_card;
+
+	err = snd_ymfpci_pcm_spdif(chip, 1);
+	if (err < 0)
+		goto free_card;
+
 	err = snd_ymfpci_mixer(chip, rear_switch[dev]);
-	if (err < 0) {
-		snd_card_free(card);
-		return err;
-	}
+	if (err < 0)
+		goto free_card;
+
 	if (chip->ac97->ext_id & AC97_EI_SDAC) {
 		err = snd_ymfpci_pcm_4ch(chip, 2);
-		if (err < 0) {
-			snd_card_free(card);
-			return err;
-		}
+		if (err < 0)
+			goto free_card;
+
 		err = snd_ymfpci_pcm2(chip, 3);
-		if (err < 0) {
-			snd_card_free(card);
-			return err;
-		}
-	}
-	if ((err = snd_ymfpci_timer(chip, 0)) < 0) {
-		snd_card_free(card);
-		return err;
+		if (err < 0)
+			goto free_card;
 	}
+	err = snd_ymfpci_timer(chip, 0);
+	if (err < 0)
+		goto free_card;
+
 	if (chip->mpu_res) {
 		if ((err = snd_mpu401_uart_new(card, 0, MPU401_HW_YMFPCI,
 					       mpu_port[dev],
@@ -336,21 +331,24 @@ static int snd_card_ymfpci_probe(struct pci_dev *pci,
 			legacy_ctrl &= ~YMFPCI_LEGACY_FMEN;
 			pci_write_config_word(pci, PCIR_DSXG_LEGACY, legacy_ctrl);
 		} else if ((err = snd_opl3_hwdep_new(opl3, 0, 1, NULL)) < 0) {
-			snd_card_free(card);
 			dev_err(card->dev, "cannot create opl3 hwdep\n");
-			return err;
+			goto free_card;
 		}
 	}
 
 	snd_ymfpci_create_gameport(chip, dev, legacy_ctrl, legacy_ctrl2);
 
-	if ((err = snd_card_register(card)) < 0) {
-		snd_card_free(card);
-		return err;
-	}
+	err = snd_card_register(card);
+	if (err < 0)
+		goto free_card;
+
 	pci_set_drvdata(pci, card);
 	dev++;
 	return 0;
+
+free_card:
+	snd_card_free(card);
+	return err;
 }
 
 static void snd_card_ymfpci_remove(struct pci_dev *pci)
diff --git a/sound/pci/ymfpci/ymfpci_main.c b/sound/pci/ymfpci/ymfpci_main.c
index edfd58248082..8ca2e41e5827 100644
--- a/sound/pci/ymfpci/ymfpci_main.c
+++ b/sound/pci/ymfpci/ymfpci_main.c
@@ -2399,59 +2399,60 @@ int snd_ymfpci_create(struct snd_card *card,
 		dev_err(chip->card->dev,
 			"unable to grab memory region 0x%lx-0x%lx\n",
 			chip->reg_area_phys, chip->reg_area_phys + 0x8000 - 1);
-		snd_ymfpci_free(chip);
-		return -EBUSY;
+		err = -EBUSY;
+		goto free_chip;
 	}
 	if (request_irq(pci->irq, snd_ymfpci_interrupt, IRQF_SHARED,
 			KBUILD_MODNAME, chip)) {
 		dev_err(chip->card->dev, "unable to grab IRQ %d\n", pci->irq);
-		snd_ymfpci_free(chip);
-		return -EBUSY;
+		err = -EBUSY;
+		goto free_chip;
 	}
 	chip->irq = pci->irq;
 
 	snd_ymfpci_aclink_reset(pci);
 	if (snd_ymfpci_codec_ready(chip, 0) < 0) {
-		snd_ymfpci_free(chip);
-		return -EIO;
+		err = -EIO;
+		goto free_chip;
 	}
 
 	err = snd_ymfpci_request_firmware(chip);
 	if (err < 0) {
 		dev_err(chip->card->dev, "firmware request failed: %d\n", err);
-		snd_ymfpci_free(chip);
-		return err;
+		goto free_chip;
 	}
 	snd_ymfpci_download_image(chip);
 
 	udelay(100); /* seems we need a delay after downloading image.. */
 
 	if (snd_ymfpci_memalloc(chip) < 0) {
-		snd_ymfpci_free(chip);
-		return -EIO;
+		err = -EIO;
+		goto free_chip;
 	}
 
-	if ((err = snd_ymfpci_ac3_init(chip)) < 0) {
-		snd_ymfpci_free(chip);
-		return err;
-	}
+	err = snd_ymfpci_ac3_init(chip);
+	if (err < 0)
+		goto free_chip;
 
 #ifdef CONFIG_PM_SLEEP
 	chip->saved_regs = kmalloc(YDSXGR_NUM_SAVED_REGS * sizeof(u32),
 				   GFP_KERNEL);
 	if (chip->saved_regs == NULL) {
-		snd_ymfpci_free(chip);
-		return -ENOMEM;
+		err = -ENOMEM;
+		goto free_chip;
 	}
 #endif
 
-	if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) {
-		snd_ymfpci_free(chip);
-		return err;
-	}
+	err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops);
+	if (err < 0)
+		goto free_chip;
 
 	snd_ymfpci_proc_init(card, chip);
 
 	*rchip = chip;
 	return 0;
+
+free_chip:
+	snd_ymfpci_free(chip);
+	return err;
 }
diff --git a/sound/usb/6fire/chip.c b/sound/usb/6fire/chip.c
index bc2a24f7a791..c7641cb50616 100644
--- a/sound/usb/6fire/chip.c
+++ b/sound/usb/6fire/chip.c
@@ -143,37 +143,32 @@ static int usb6fire_chip_probe(struct usb_interface *intf,
 	chip->card = card;
 
 	ret = usb6fire_comm_init(chip);
-	if (ret < 0) {
-		usb6fire_chip_destroy(chip);
-		return ret;
-	}
+	if (ret < 0)
+		goto destroy_chip;
 
 	ret = usb6fire_midi_init(chip);
-	if (ret < 0) {
-		usb6fire_chip_destroy(chip);
-		return ret;
-	}
+	if (ret < 0)
+		goto destroy_chip;
 
 	ret = usb6fire_pcm_init(chip);
-	if (ret < 0) {
-		usb6fire_chip_destroy(chip);
-		return ret;
-	}
+	if (ret < 0)
+		goto destroy_chip;
 
 	ret = usb6fire_control_init(chip);
-	if (ret < 0) {
-		usb6fire_chip_destroy(chip);
-		return ret;
-	}
+	if (ret < 0)
+		goto destroy_chip;
 
 	ret = snd_card_register(card);
 	if (ret < 0) {
 		dev_err(&intf->dev, "cannot register card.");
-		usb6fire_chip_destroy(chip);
-		return ret;
+		goto destroy_chip;
 	}
 	usb_set_intfdata(intf, chip);
 	return 0;
+
+destroy_chip:
+	usb6fire_chip_destroy(chip);
+	return ret;
 }
 
 static void usb6fire_chip_disconnect(struct usb_interface *intf)
diff --git a/sound/usb/usx2y/us122l.c b/sound/usb/usx2y/us122l.c
index b49d6e953d52..159da1f3924e 100644
--- a/sound/usb/usx2y/us122l.c
+++ b/sound/usb/usx2y/us122l.c
@@ -508,8 +508,7 @@ static bool us122l_create_card(struct snd_card *card)
 		err = us122l_create_usbmidi(card);
 	if (err < 0) {
 		snd_printk(KERN_ERR "us122l_create_usbmidi error %i \n", err);
-		us122l_stop(us122l);
-		return false;
+		goto stop;
 	}
 	err = usb_stream_hwdep_new(card);
 	if (err < 0) {
@@ -518,10 +517,13 @@ static bool us122l_create_card(struct snd_card *card)
 		list_for_each(p, &us122l->midi_list)
 			snd_usbmidi_disconnect(p);
 
-		us122l_stop(us122l);
-		return false;
+		goto stop;
 	}
 	return true;
+
+stop:
+	us122l_stop(us122l);
+	return false;
 }
 
 static void snd_us122l_free(struct snd_card *card)
diff --git a/sound/usb/usx2y/usb_stream.c b/sound/usb/usx2y/usb_stream.c
index fe926cb9192e..4dab49080700 100644
--- a/sound/usb/usx2y/usb_stream.c
+++ b/sound/usb/usx2y/usb_stream.c
@@ -352,20 +352,22 @@ static int submit_urbs(struct usb_stream_kernel *sk,
 	int err;
 	prepare_inurb(sk->idle_outurb->number_of_packets, sk->idle_inurb);
 	err = usb_submit_urb(sk->idle_inurb, GFP_ATOMIC);
-	if (err < 0) {
-		snd_printk(KERN_ERR "%i\n", err);
-		return err;
-	}
+	if (err < 0)
+		goto report_failure;
+
 	sk->idle_inurb = sk->completed_inurb;
 	sk->completed_inurb = inurb;
 	err = usb_submit_urb(sk->idle_outurb, GFP_ATOMIC);
-	if (err < 0) {
-		snd_printk(KERN_ERR "%i\n", err);
-		return err;
-	}
+	if (err < 0)
+		goto report_failure;
+
 	sk->idle_outurb = sk->completed_outurb;
 	sk->completed_outurb = outurb;
 	return 0;
+
+report_failure:
+	snd_printk(KERN_ERR "%i\n", err);
+	return err;
 }
 
 #ifdef DEBUG_LOOP_BACK