Merge tag 'trace-v7.3-2' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-tracegrafted

Pull tracing fixes from Steven Rostedt:

 - Fix error output of boot instance creation failure

   Currently if a boot instance creation fails, instead of printing out
   the name of the instance that failed, it prints "(null)". That is
   because it prints "cur_str" that had already been processed by
   strsep(). Print the saved name instead.

   While at it, print the error code of the failure.

 - Fix use-after-free for same named historgrams

   Histograms can be named so that they can be used in multiple events.
   But if the named histogram has a variable attached, the second event
   that uses the named histogram which duplicates it and needs to free
   the original after duplication leaves the old variable in place and
   still visible. If another histogram uses than variable, it will use
   the stale one which will try to reference the freed duplicate
   histogram and crash the kernel.

   Free the duplicate variables along with the duplicated histogram
   data.

 - Check return value of kthread_run() in event self test

   The events self tests uses a kthread for testing but does not check
   if it succeeded in creating a kthread. If the kthread creation were
   to fail, the code will still try to call kthread_stop() on the error
   returned.

 - Fix race between reading trace_pipe and updating subbuffer size

   If a user is reading the trace_pipe file at the same time they update
   the ring buffer sub-buffer size, can cause the trace_pipe read to
   read stale data. Add trace_access_lock() around updating the ring
   buffer sub-buffer size.

 - Fix eventfs_inode on failure path in creation of the events directory

   In the creation of the "events" directory, if after allocating the
   eventfs_inode a failure is detected, it calls cleanup_ei() which
   calls free_ei(). The free_ei() will test if eventfs_inode being freed
   has no children. It is a bug if it does. But on the failure case of
   the creation of the "events" directory, the children lists have not
   yet been initialized and the free will trigger a warning because
   list_empty() on an uninitialized list returns false.

   Move the initialization into init_ei() where it makes more sense and
   makes sure that a created eventfs_inode has its lists initialized
   upon creation.

 - Check return value of kthread_run() in ftrace direct sample code

   The sample code that shows how to use the ftrace direct calls does
   not test the return of kthread_run() to see if it succeeds. Return a
   failure if the kthread_run() doesn't succeed.

 - Clear user events state on fork in case of alloc failure

   On fork, the child gets a pointer to the parent's user events state.
   It makes a copy of it then updates the child's pointer to it. But if
   the allocation fails, the duplication function leaves the child with
   a pointer to its parent's descriptor. When the child cleans up its
   data, it will free the parent's descriptor while the parent is still
   using it.

   In the duplication function, set the child's user_event_mm to NULL
   before testing if the allocation succeeded, and when it exits it will
   not free the parent's descriptor.

 - Fix retry exhaustion in simple ring buffer reader swap

   simple_ring_buffer_swap_reader_page() starts with retry set to 8 and
   post-decrements it only after a failed link replacement. On the final
   attempt, a successful replacement leaves retry at zero, while a
   failed replacement leaves it at -1.

   But the check for success expects the retry value to be non-zero and
   exits with an error on zero. This is the opposite result. Fix it.

 - Fail nicely when the remote swap_reader_page() returns an error

   Currently, if the swap_reader_page() of a remote buffer fails, it
   triggers a WARN_ON_ONCE() and continues normally. Instead, have it
   exit with an error and a pr_warn() print instead of a full WARNING.

* tag 'trace-v7.3-2' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace:
  ring-buffer: Stop remote reader update when page swap fails
  tracing: Fix retry exhaustion in simple ring buffer reader swap
  tracing/user_events: Clear copied tracing state before fork duplication
  samples/ftrace: Fix kthread_stop() on ERR_PTR in ftrace-direct-multi-modify
  samples/ftrace: Fix kthread_stop() on ERR_PTR in ftrace-direct-modify
  eventfs: Initialize ei->children and ei->list in init_ei()
  tracing: Fix use-after-free in trace_pipe read on sub-buffer order change
  tracing: Fix crash passing ERR_PTR to kthread_stop()
  tracing: Fix use-after-free with same-name named triggers
  tracing: Fix logged instance name on creation failure

1 files changed, 650 insertions, 0 deletions

diff --git a/sound/soc/generic/test-component.c b/sound/soc/generic/test-component.c
new file mode 100644
index 000000000..6f9f498c4
--- /dev/null
+++ b/sound/soc/generic/test-component.c
@@ -0,0 +1,650 @@
+// SPDX-License-Identifier: GPL-2.0
+//
+// test-component.c  --  Test Audio Component driver
+//
+// Copyright (C) 2020 Renesas Electronics Corporation
+// Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
+
+#include <linux/slab.h>
+#include <linux/of.h>
+#include <linux/of_graph.h>
+#include <linux/module.h>
+#include <linux/workqueue.h>
+#include <sound/pcm.h>
+#include <sound/soc.h>
+
+#define TEST_NAME_LEN 32
+struct test_dai_name {
+	char name[TEST_NAME_LEN];
+	char name_playback[TEST_NAME_LEN];
+	char name_capture[TEST_NAME_LEN];
+};
+
+struct test_priv {
+	struct device *dev;
+	struct snd_pcm_substream *substream;
+	struct delayed_work dwork;
+	struct snd_soc_component_driver *component_driver;
+	struct snd_soc_dai_driver *dai_driver;
+	struct test_dai_name *name;
+};
+
+struct test_adata {
+	u32 is_cpu:1;
+	u32 cmp_v:1;
+	u32 dai_v:1;
+};
+
+#define mile_stone(d)		dev_info((d)->dev, "%s() : %s", __func__, (d)->driver->name)
+#define mile_stone_x(dev)	dev_info(dev, "%s()", __func__)
+
+static int test_dai_set_sysclk(struct snd_soc_dai *dai,
+			       int clk_id, unsigned int freq, int dir)
+{
+	mile_stone(dai);
+
+	return 0;
+}
+
+static int test_dai_set_pll(struct snd_soc_dai *dai, int pll_id, int source,
+			    unsigned int freq_in, unsigned int freq_out)
+{
+	mile_stone(dai);
+
+	return 0;
+}
+
+static int test_dai_set_clkdiv(struct snd_soc_dai *dai, int div_id, int div)
+{
+	mile_stone(dai);
+
+	return 0;
+}
+
+static int test_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
+{
+	unsigned int format = fmt & SND_SOC_DAIFMT_FORMAT_MASK;
+	unsigned int clock  = fmt & SND_SOC_DAIFMT_CLOCK_MASK;
+	unsigned int inv    = fmt & SND_SOC_DAIFMT_INV_MASK;
+	unsigned int master = fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK;
+	char *str;
+
+	dev_info(dai->dev, "name   : %s", dai->name);
+
+	str = "unknown";
+	switch (format) {
+	case SND_SOC_DAIFMT_I2S:
+		str = "i2s";
+		break;
+	case SND_SOC_DAIFMT_RIGHT_J:
+		str = "right_j";
+		break;
+	case SND_SOC_DAIFMT_LEFT_J:
+		str = "left_j";
+		break;
+	case SND_SOC_DAIFMT_DSP_A:
+		str = "dsp_a";
+		break;
+	case SND_SOC_DAIFMT_DSP_B:
+		str = "dsp_b";
+		break;
+	case SND_SOC_DAIFMT_AC97:
+		str = "ac97";
+		break;
+	case SND_SOC_DAIFMT_PDM:
+		str = "pdm";
+		break;
+	}
+	dev_info(dai->dev, "format : %s", str);
+
+	if (clock == SND_SOC_DAIFMT_CONT)
+		str = "continuous";
+	else
+		str = "gated";
+	dev_info(dai->dev, "clock  : %s", str);
+
+	str = "unknown";
+	switch (master) {
+	case SND_SOC_DAIFMT_BP_FP:
+		str = "clk provider, frame provider";
+		break;
+	case SND_SOC_DAIFMT_BC_FP:
+		str = "clk consumer, frame provider";
+		break;
+	case SND_SOC_DAIFMT_BP_FC:
+		str = "clk provider, frame consumer";
+		break;
+	case SND_SOC_DAIFMT_BC_FC:
+		str = "clk consumer, frame consumer";
+		break;
+	}
+	dev_info(dai->dev, "clock  : codec is %s", str);
+
+	str = "unknown";
+	switch (inv) {
+	case SND_SOC_DAIFMT_NB_NF:
+		str = "normal bit, normal frame";
+		break;
+	case SND_SOC_DAIFMT_NB_IF:
+		str = "normal bit, invert frame";
+		break;
+	case SND_SOC_DAIFMT_IB_NF:
+		str = "invert bit, normal frame";
+		break;
+	case SND_SOC_DAIFMT_IB_IF:
+		str = "invert bit, invert frame";
+		break;
+	}
+	dev_info(dai->dev, "signal : %s", str);
+
+	return 0;
+}
+
+static int test_dai_set_tdm_slot(struct snd_soc_dai *dai,
+				 unsigned int tx_mask, unsigned int rx_mask,
+				 int slots, int slot_width)
+{
+	dev_info(dai->dev, "set tdm slot: tx_mask=0x%08X, rx_mask=0x%08X, slots=%d, slot_width=%d\n",
+		 tx_mask, rx_mask, slots, slot_width);
+	return 0;
+}
+
+static int test_dai_mute_stream(struct snd_soc_dai *dai, int mute, int stream)
+{
+	mile_stone(dai);
+
+	return 0;
+}
+
+static int test_dai_startup(struct snd_pcm_substream *substream, struct snd_soc_dai *dai)
+{
+	mile_stone(dai);
+
+	return 0;
+}
+
+static void test_dai_shutdown(struct snd_pcm_substream *substream, struct snd_soc_dai *dai)
+{
+	mile_stone(dai);
+}
+
+static int test_dai_hw_params(struct snd_pcm_substream *substream,
+			      struct snd_pcm_hw_params *params, struct snd_soc_dai *dai)
+{
+	mile_stone(dai);
+
+	return 0;
+}
+
+static int test_dai_hw_free(struct snd_pcm_substream *substream, struct snd_soc_dai *dai)
+{
+	mile_stone(dai);
+
+	return 0;
+}
+
+static int test_dai_trigger(struct snd_pcm_substream *substream, int cmd, struct snd_soc_dai *dai)
+{
+	mile_stone(dai);
+
+	return 0;
+}
+
+static const u64 test_dai_formats =
+	SND_SOC_POSSIBLE_DAIFMT_I2S	|
+	SND_SOC_POSSIBLE_DAIFMT_RIGHT_J	|
+	SND_SOC_POSSIBLE_DAIFMT_LEFT_J	|
+	SND_SOC_POSSIBLE_DAIFMT_DSP_A	|
+	SND_SOC_POSSIBLE_DAIFMT_DSP_B	|
+	SND_SOC_POSSIBLE_DAIFMT_AC97	|
+	SND_SOC_POSSIBLE_DAIFMT_PDM	|
+	SND_SOC_POSSIBLE_DAIFMT_NB_NF	|
+	SND_SOC_POSSIBLE_DAIFMT_NB_IF	|
+	SND_SOC_POSSIBLE_DAIFMT_IB_NF	|
+	SND_SOC_POSSIBLE_DAIFMT_IB_IF;
+
+static const struct snd_soc_dai_ops test_ops = {
+	.set_fmt		= test_dai_set_fmt,
+	.set_tdm_slot		= test_dai_set_tdm_slot,
+	.startup		= test_dai_startup,
+	.shutdown		= test_dai_shutdown,
+	.auto_selectable_formats	= &test_dai_formats,
+	.num_auto_selectable_formats	= 1,
+};
+
+static const struct snd_soc_dai_ops test_verbose_ops = {
+	.set_sysclk		= test_dai_set_sysclk,
+	.set_pll		= test_dai_set_pll,
+	.set_clkdiv		= test_dai_set_clkdiv,
+	.set_fmt		= test_dai_set_fmt,
+	.set_tdm_slot		= test_dai_set_tdm_slot,
+	.mute_stream		= test_dai_mute_stream,
+	.startup		= test_dai_startup,
+	.shutdown		= test_dai_shutdown,
+	.hw_params		= test_dai_hw_params,
+	.hw_free		= test_dai_hw_free,
+	.trigger		= test_dai_trigger,
+	.auto_selectable_formats	= &test_dai_formats,
+	.num_auto_selectable_formats	= 1,
+};
+
+#define STUB_RATES	SNDRV_PCM_RATE_CONTINUOUS
+#define STUB_FORMATS	(SNDRV_PCM_FMTBIT_S8		| \
+			 SNDRV_PCM_FMTBIT_U8		| \
+			 SNDRV_PCM_FMTBIT_S16_LE	| \
+			 SNDRV_PCM_FMTBIT_U16_LE	| \
+			 SNDRV_PCM_FMTBIT_S24_LE	| \
+			 SNDRV_PCM_FMTBIT_S24_3LE	| \
+			 SNDRV_PCM_FMTBIT_U24_LE	| \
+			 SNDRV_PCM_FMTBIT_S32_LE	| \
+			 SNDRV_PCM_FMTBIT_U32_LE)
+
+static int test_component_probe(struct snd_soc_component *component)
+{
+	mile_stone(component);
+
+	return 0;
+}
+
+static void test_component_remove(struct snd_soc_component *component)
+{
+	mile_stone(component);
+}
+
+static int test_component_suspend(struct snd_soc_component *component)
+{
+	mile_stone(component);
+
+	return 0;
+}
+
+static int test_component_resume(struct snd_soc_component *component)
+{
+	mile_stone(component);
+
+	return 0;
+}
+
+#define PREALLOC_BUFFER		(32 * 1024)
+static int test_component_pcm_new(struct snd_soc_component *component,
+				  struct snd_soc_pcm_runtime *rtd)
+{
+	mile_stone(component);
+
+	snd_pcm_set_managed_buffer_all(
+		rtd->pcm,
+		SNDRV_DMA_TYPE_DEV,
+		rtd->card->snd_card->dev,
+		PREALLOC_BUFFER, PREALLOC_BUFFER);
+
+	return 0;
+}
+
+static void test_component_pcm_free(struct snd_soc_component *component,
+				    struct snd_pcm *pcm)
+{
+	mile_stone(component);
+}
+
+static int test_component_set_sysclk(struct snd_soc_component *component,
+				     int clk_id, int source, unsigned int freq, int dir)
+{
+	mile_stone(component);
+
+	return 0;
+}
+
+static int test_component_set_pll(struct snd_soc_component *component, int pll_id,
+				  int source, unsigned int freq_in, unsigned int freq_out)
+{
+	mile_stone(component);
+
+	return 0;
+}
+
+static int test_component_set_jack(struct snd_soc_component *component,
+				   struct snd_soc_jack *jack,  void *data)
+{
+	mile_stone(component);
+
+	return 0;
+}
+
+static void test_component_seq_notifier(struct snd_soc_component *component,
+					enum snd_soc_dapm_type type, int subseq)
+{
+	mile_stone(component);
+}
+
+static int test_component_stream_event(struct snd_soc_component *component, int event)
+{
+	mile_stone(component);
+
+	return 0;
+}
+
+static int test_component_set_bias_level(struct snd_soc_component *component,
+					 enum snd_soc_bias_level level)
+{
+	mile_stone(component);
+
+	return 0;
+}
+
+static const struct snd_pcm_hardware test_component_hardware = {
+	/* Random values to keep userspace happy when checking constraints */
+	.info			= SNDRV_PCM_INFO_INTERLEAVED	|
+				  SNDRV_PCM_INFO_MMAP		|
+				  SNDRV_PCM_INFO_MMAP_VALID,
+	.buffer_bytes_max	= 32 * 1024,
+	.period_bytes_min	= 32,
+	.period_bytes_max	= 8192,
+	.periods_min		= 1,
+	.periods_max		= 128,
+	.fifo_size		= 256,
+};
+
+static int test_component_open(struct snd_soc_component *component,
+			       struct snd_pcm_substream *substream)
+{
+	struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
+
+	mile_stone(component);
+
+	/* BE's dont need dummy params */
+	if (!rtd->dai_link->no_pcm)
+		snd_soc_set_runtime_hwparams(substream, &test_component_hardware);
+
+	return 0;
+}
+
+static int test_component_close(struct snd_soc_component *component,
+				struct snd_pcm_substream *substream)
+{
+	mile_stone(component);
+
+	return 0;
+}
+
+static int test_component_ioctl(struct snd_soc_component *component,
+				struct snd_pcm_substream *substream,
+				unsigned int cmd, void *arg)
+{
+	mile_stone(component);
+
+	return 0;
+}
+
+static int test_component_hw_params(struct snd_soc_component *component,
+				    struct snd_pcm_substream *substream,
+				    struct snd_pcm_hw_params *params)
+{
+	mile_stone(component);
+
+	return 0;
+}
+
+static int test_component_hw_free(struct snd_soc_component *component,
+				  struct snd_pcm_substream *substream)
+{
+	mile_stone(component);
+
+	return 0;
+}
+
+static int test_component_prepare(struct snd_soc_component *component,
+				  struct snd_pcm_substream *substream)
+{
+	mile_stone(component);
+
+	return 0;
+}
+
+static void test_component_timer_stop(struct test_priv *priv)
+{
+	cancel_delayed_work(&priv->dwork);
+}
+
+static void test_component_timer_start(struct test_priv *priv)
+{
+	schedule_delayed_work(&priv->dwork, msecs_to_jiffies(10));
+}
+
+static void test_component_dwork(struct work_struct *work)
+{
+	struct test_priv *priv = container_of(work, struct test_priv, dwork.work);
+
+	if (priv->substream)
+		snd_pcm_period_elapsed(priv->substream);
+
+	test_component_timer_start(priv);
+}
+
+static int test_component_trigger(struct snd_soc_component *component,
+				  struct snd_pcm_substream *substream, int cmd)
+{
+	struct test_priv *priv = dev_get_drvdata(component->dev);
+
+	mile_stone(component);
+
+	switch (cmd) {
+	case SNDRV_PCM_TRIGGER_START:
+		test_component_timer_start(priv);
+		priv->substream = substream; /* set substream later */
+		break;
+	case SNDRV_PCM_TRIGGER_STOP:
+		priv->substream = NULL;
+		test_component_timer_stop(priv);
+	}
+
+	return 0;
+}
+
+static int test_component_sync_stop(struct snd_soc_component *component,
+				    struct snd_pcm_substream *substream)
+{
+	mile_stone(component);
+
+	return 0;
+}
+
+static snd_pcm_uframes_t test_component_pointer(struct snd_soc_component *component,
+						struct snd_pcm_substream *substream)
+{
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	static int pointer;
+
+	if (!runtime)
+		return 0;
+
+	pointer += 10;
+	if (pointer > PREALLOC_BUFFER)
+		pointer = 0;
+
+	/* mile_stone(component); */
+
+	return bytes_to_frames(runtime, pointer);
+}
+
+static int test_component_get_time_info(struct snd_soc_component *component,
+					struct snd_pcm_substream *substream,
+					struct timespec64 *system_ts,
+					struct timespec64 *audio_ts,
+					struct snd_pcm_audio_tstamp_config *audio_tstamp_config,
+					struct snd_pcm_audio_tstamp_report *audio_tstamp_report)
+{
+	mile_stone(component);
+
+	return 0;
+}
+
+static int test_component_be_hw_params_fixup(struct snd_soc_pcm_runtime *rtd,
+					     struct snd_pcm_hw_params *params)
+{
+	mile_stone_x(rtd->dev);
+
+	return 0;
+}
+
+/* CPU */
+static const struct test_adata test_cpu		= { .is_cpu = 1, .cmp_v = 0, .dai_v = 0, };
+static const struct test_adata test_cpu_vv	= { .is_cpu = 1, .cmp_v = 1, .dai_v = 1, };
+static const struct test_adata test_cpu_nv	= { .is_cpu = 1, .cmp_v = 0, .dai_v = 1, };
+static const struct test_adata test_cpu_vn	= { .is_cpu = 1, .cmp_v = 1, .dai_v = 0, };
+/* Codec */
+static const struct test_adata test_codec	= { .is_cpu = 0, .cmp_v = 0, .dai_v = 0, };
+static const struct test_adata test_codec_vv	= { .is_cpu = 0, .cmp_v = 1, .dai_v = 1, };
+static const struct test_adata test_codec_nv	= { .is_cpu = 0, .cmp_v = 0, .dai_v = 1, };
+static const struct test_adata test_codec_vn	= { .is_cpu = 0, .cmp_v = 1, .dai_v = 0, };
+
+static const struct of_device_id test_of_match[] = {
+	{ .compatible = "test-cpu",			.data = (void *)&test_cpu,    },
+	{ .compatible = "test-cpu-verbose",		.data = (void *)&test_cpu_vv, },
+	{ .compatible = "test-cpu-verbose-dai",		.data = (void *)&test_cpu_nv, },
+	{ .compatible = "test-cpu-verbose-component",	.data = (void *)&test_cpu_vn, },
+	{ .compatible = "test-codec",			.data = (void *)&test_codec,    },
+	{ .compatible = "test-codec-verbose",		.data = (void *)&test_codec_vv, },
+	{ .compatible = "test-codec-verbose-dai",	.data = (void *)&test_codec_nv, },
+	{ .compatible = "test-codec-verbose-component",	.data = (void *)&test_codec_vn, },
+	{},
+};
+MODULE_DEVICE_TABLE(of, test_of_match);
+
+static const struct snd_soc_dapm_widget widgets[] = {
+	/*
+	 * FIXME
+	 *
+	 * Just IN/OUT is OK for now,
+	 * but need to be updated ?
+	 */
+	SND_SOC_DAPM_INPUT("IN"),
+	SND_SOC_DAPM_OUTPUT("OUT"),
+};
+
+static int test_driver_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct device_node *node = dev->of_node;
+	const struct test_adata *adata = of_device_get_match_data(&pdev->dev);
+	struct snd_soc_component_driver *cdriv;
+	struct snd_soc_dai_driver *ddriv;
+	struct test_dai_name *dname;
+	struct test_priv *priv;
+	int num, ret, i;
+
+	num = of_graph_get_endpoint_count(node);
+	if (!num) {
+		dev_err(dev, "no port exits\n");
+		return -EINVAL;
+	}
+
+	priv	= devm_kzalloc(dev, sizeof(*priv),		GFP_KERNEL);
+	cdriv	= devm_kzalloc(dev, sizeof(*cdriv),		GFP_KERNEL);
+	ddriv	= devm_kcalloc(dev, num, sizeof(*ddriv), 	GFP_KERNEL);
+	dname	= devm_kcalloc(dev, num, sizeof(*dname), 	GFP_KERNEL);
+	if (!priv || !cdriv || !ddriv || !dname || !adata)
+		return -EINVAL;
+
+	priv->dev		= dev;
+	priv->component_driver	= cdriv;
+	priv->dai_driver	= ddriv;
+	priv->name		= dname;
+
+	INIT_DELAYED_WORK(&priv->dwork, test_component_dwork);
+	dev_set_drvdata(dev, priv);
+
+	if (adata->is_cpu) {
+		cdriv->name			= "test_cpu";
+		cdriv->pcm_new			= test_component_pcm_new;
+		cdriv->pointer			= test_component_pointer;
+		cdriv->trigger			= test_component_trigger;
+		cdriv->legacy_dai_naming	= 1;
+	} else {
+		cdriv->name			= "test_codec";
+		cdriv->idle_bias_on		= 1;
+		cdriv->endianness		= 1;
+	}
+
+	cdriv->open		= test_component_open;
+	cdriv->dapm_widgets	= widgets;
+	cdriv->num_dapm_widgets	= ARRAY_SIZE(widgets);
+
+	if (adata->cmp_v) {
+		cdriv->probe			= test_component_probe;
+		cdriv->remove			= test_component_remove;
+		cdriv->suspend			= test_component_suspend;
+		cdriv->resume			= test_component_resume;
+		cdriv->set_sysclk		= test_component_set_sysclk;
+		cdriv->set_pll			= test_component_set_pll;
+		cdriv->set_jack			= test_component_set_jack;
+		cdriv->seq_notifier		= test_component_seq_notifier;
+		cdriv->stream_event		= test_component_stream_event;
+		cdriv->set_bias_level		= test_component_set_bias_level;
+		cdriv->close			= test_component_close;
+		cdriv->ioctl			= test_component_ioctl;
+		cdriv->hw_params		= test_component_hw_params;
+		cdriv->hw_free			= test_component_hw_free;
+		cdriv->prepare			= test_component_prepare;
+		cdriv->sync_stop		= test_component_sync_stop;
+		cdriv->get_time_info		= test_component_get_time_info;
+		cdriv->be_hw_params_fixup	= test_component_be_hw_params_fixup;
+
+		if (adata->is_cpu)
+			cdriv->pcm_free	= test_component_pcm_free;
+	}
+
+	i = 0;
+	for_each_of_graph_port(node, port) {
+		snprintf(dname[i].name, TEST_NAME_LEN, "%s.%d", node->name, i);
+		ddriv[i].name = dname[i].name;
+
+		snprintf(dname[i].name_playback, TEST_NAME_LEN, "DAI%d Playback", i);
+		ddriv[i].playback.stream_name	= dname[i].name_playback;
+		ddriv[i].playback.channels_min	= 1;
+		ddriv[i].playback.channels_max	= 384;
+		ddriv[i].playback.rates		= STUB_RATES;
+		ddriv[i].playback.formats	= STUB_FORMATS;
+
+		snprintf(dname[i].name_capture, TEST_NAME_LEN, "DAI%d Capture", i);
+		ddriv[i].capture.stream_name	= dname[i].name_capture;
+		ddriv[i].capture.channels_min	= 1;
+		ddriv[i].capture.channels_max	= 384;
+		ddriv[i].capture.rates		= STUB_RATES;
+		ddriv[i].capture.formats	= STUB_FORMATS;
+
+		if (adata->dai_v)
+			ddriv[i].ops = &test_verbose_ops;
+		else
+			ddriv[i].ops = &test_ops;
+
+		i++;
+	}
+
+	ret = devm_snd_soc_register_component(dev, cdriv, ddriv, num);
+	if (ret < 0)
+		return ret;
+
+	mile_stone_x(dev);
+
+	return 0;
+}
+
+static void test_driver_remove(struct platform_device *pdev)
+{
+	mile_stone_x(&pdev->dev);
+}
+
+static struct platform_driver test_driver = {
+	.driver = {
+		.name = "test-component",
+		.of_match_table = test_of_match,
+	},
+	.probe  = test_driver_probe,
+	.remove = test_driver_remove,
+};
+module_platform_driver(test_driver);
+
+MODULE_ALIAS("platform:asoc-test-component");
+MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");
+MODULE_DESCRIPTION("ASoC Test Component");
+MODULE_LICENSE("GPL v2");