Merge tag 'sound-5.1-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound

Pull sound fixes from Takashi Iwai:
 "Well, this one became unpleasantly larger than previous pull requests,
  but it's a kind of usual pattern: now it contains a collection of ASoC
  fixes, and nothing to worry too much.

  The fixes for ASoC core (DAPM, DPCM, topology) are all small and just
  covering corner cases. The rest changes are driver-specific, many of
  which are for x86 platforms and new drivers like STM32, in addition to
  the usual fixups for HD-audio"

* tag 'sound-5.1-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound: (66 commits)
  ASoC: wcd9335: Fix missing regmap requirement
  ALSA: hda: Fix racy display power access
  ASoC: pcm: fix error handling when try_module_get() fails.
  ASoC: stm32: sai: fix master clock management
  ASoC: Intel: kbl: fix wrong number of channels
  ALSA: hda - Add two more machines to the power_save_blacklist
  ASoC: pcm: update module refcount if module_get_upon_open is set
  ASoC: core: conditionally increase module refcount on component open
  ASoC: stm32: fix sai driver name initialisation
  ASoC: topology: Use the correct dobj to free enum control values and texts
  ALSA: seq: Fix OOB-reads from strlcpy
  ASoC: intel: skylake: add remove() callback for component driver
  ASoC: cs35l35: Disable regulators on driver removal
  ALSA: xen-front: Do not use stream buffer size before it is set
  ASoC: rockchip: pdm: change dma burst to 8
  ASoC: rockchip: pdm: fix regmap_ops hang issue
  ASoC: simple-card: don't select DPCM via simple-audio-card
  ASoC: audio-graph-card: don't select DPCM via audio-graph-card
  ASoC: tlv320aic32x4: Change author's name
  ALSA: hda/realtek - Add quirk for Tuxedo XC 1509
  ...

1 files changed, 34 insertions, 4 deletions

diff --git a/sound/soc/stm/stm32_adfsdm.c b/sound/soc/stm/stm32_adfsdm.c
index 47901983a6ff..78bed9734713 100644
--- a/sound/soc/stm/stm32_adfsdm.c
+++ b/sound/soc/stm/stm32_adfsdm.c
@@ -9,6 +9,7 @@
 
 #include <linux/clk.h>
 #include <linux/module.h>
+#include <linux/mutex.h>
 #include <linux/platform_device.h>
 #include <linux/slab.h>
 
@@ -37,6 +38,8 @@ struct stm32_adfsdm_priv {
 	/* PCM buffer */
 	unsigned char *pcm_buff;
 	unsigned int pos;
+
+	struct mutex lock; /* protect against race condition on iio state */
 };
 
 static const struct snd_pcm_hardware stm32_adfsdm_pcm_hw = {
@@ -62,10 +65,12 @@ static void stm32_adfsdm_shutdown(struct snd_pcm_substream *substream,
 {
 	struct stm32_adfsdm_priv *priv = snd_soc_dai_get_drvdata(dai);
 
+	mutex_lock(&priv->lock);
 	if (priv->iio_active) {
 		iio_channel_stop_all_cb(priv->iio_cb);
 		priv->iio_active = false;
 	}
+	mutex_unlock(&priv->lock);
 }
 
 static int stm32_adfsdm_dai_prepare(struct snd_pcm_substream *substream,
@@ -74,13 +79,19 @@ static int stm32_adfsdm_dai_prepare(struct snd_pcm_substream *substream,
 	struct stm32_adfsdm_priv *priv = snd_soc_dai_get_drvdata(dai);
 	int ret;
 
+	mutex_lock(&priv->lock);
+	if (priv->iio_active) {
+		iio_channel_stop_all_cb(priv->iio_cb);
+		priv->iio_active = false;
+	}
+
 	ret = iio_write_channel_attribute(priv->iio_ch,
 					  substream->runtime->rate, 0,
 					  IIO_CHAN_INFO_SAMP_FREQ);
 	if (ret < 0) {
 		dev_err(dai->dev, "%s: Failed to set %d sampling rate\n",
 			__func__, substream->runtime->rate);
-		return ret;
+		goto out;
 	}
 
 	if (!priv->iio_active) {
@@ -92,6 +103,9 @@ static int stm32_adfsdm_dai_prepare(struct snd_pcm_substream *substream,
 				__func__, ret);
 	}
 
+out:
+	mutex_unlock(&priv->lock);
+
 	return ret;
 }
 
@@ -291,6 +305,7 @@ MODULE_DEVICE_TABLE(of, stm32_adfsdm_of_match);
 static int stm32_adfsdm_probe(struct platform_device *pdev)
 {
 	struct stm32_adfsdm_priv *priv;
+	struct snd_soc_component *component;
 	int ret;
 
 	priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
@@ -299,6 +314,7 @@ static int stm32_adfsdm_probe(struct platform_device *pdev)
 
 	priv->dev = &pdev->dev;
 	priv->dai_drv = stm32_adfsdm_dai;
+	mutex_init(&priv->lock);
 
 	dev_set_drvdata(&pdev->dev, priv);
 
@@ -317,9 +333,15 @@ static int stm32_adfsdm_probe(struct platform_device *pdev)
 	if (IS_ERR(priv->iio_cb))
 		return PTR_ERR(priv->iio_cb);
 
-	ret = devm_snd_soc_register_component(&pdev->dev,
-					      &stm32_adfsdm_soc_platform,
-					      NULL, 0);
+	component = devm_kzalloc(&pdev->dev, sizeof(*component), GFP_KERNEL);
+	if (!component)
+		return -ENOMEM;
+#ifdef CONFIG_DEBUG_FS
+	component->debugfs_prefix = "pcm";
+#endif
+
+	ret = snd_soc_add_component(&pdev->dev, component,
+				    &stm32_adfsdm_soc_platform, NULL, 0);
 	if (ret < 0)
 		dev_err(&pdev->dev, "%s: Failed to register PCM platform\n",
 			__func__);
@@ -327,12 +349,20 @@ static int stm32_adfsdm_probe(struct platform_device *pdev)
 	return ret;
 }
 
+static int stm32_adfsdm_remove(struct platform_device *pdev)
+{
+	snd_soc_unregister_component(&pdev->dev);
+
+	return 0;
+}
+
 static struct platform_driver stm32_adfsdm_driver = {
 	.driver = {
 		   .name = STM32_ADFSDM_DRV_NAME,
 		   .of_match_table = stm32_adfsdm_of_match,
 		   },
 	.probe = stm32_adfsdm_probe,
+	.remove = stm32_adfsdm_remove,
 };
 
 module_platform_driver(stm32_adfsdm_driver);