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, 499 insertions, 0 deletions

diff --git a/sound/soc/codecs/rt9123.c b/sound/soc/codecs/rt9123.c
new file mode 100644
index 000000000..07eaf275c
--- /dev/null
+++ b/sound/soc/codecs/rt9123.c
@@ -0,0 +1,499 @@
+// SPDX-License-Identifier: GPL-2.0-only
+//
+// rt9123.c -- RT9123 (SW I2C Mode) ALSA SoC Codec driver
+//
+// Author: ChiYuan Huang <cy_huang@richtek.com>
+
+#include <linux/acpi.h>
+#include <linux/bitfield.h>
+#include <linux/bits.h>
+#include <linux/byteorder/generic.h>
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/gpio/consumer.h>
+#include <linux/i2c.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/pm_runtime.h>
+#include <linux/property.h>
+#include <linux/regmap.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include <sound/soc-dai.h>
+#include <sound/soc-dapm.h>
+#include <sound/tlv.h>
+
+#define RT9123_REG_AMPCTRL	0x01
+#define RT9123_REG_I2SOPT	0x02
+#define RT9123_REG_TDMRX	0x03
+#define RT9123_REG_SILVOLEN	0x04
+#define RT9123_REG_VOLGAIN	0x12
+#define RT9123_REG_ANAFLAG	0x36
+#define RT9123_REG_COMBOID	0xF7
+
+#define RT9123_MASK_SWRST	BIT(15)
+#define RT9123_MASK_SWMUTE	BIT(14)
+#define RT9123_MASK_AMPON	BIT(12)
+#define RT9123_MASK_AUDBIT	GENMASK(14, 12)
+#define RT9123_MASK_AUDFMT	GENMASK(11, 8)
+#define RT9123_MASK_TDMRXLOC	GENMASK(4, 0)
+#define RT9123_MASK_VENID	GENMASK(15, 4)
+
+#define RT9123_FIXED_VENID	0x340
+
+struct rt9123_priv {
+	struct gpio_desc *enable;
+	unsigned int dai_fmt;
+	int tdm_slots;
+	int tdm_slot_width;
+};
+
+static int rt9123_enable_event(struct snd_soc_dapm_widget *w, struct snd_kcontrol *kcontrol,
+			       int event)
+{
+	struct snd_soc_component *comp = snd_soc_dapm_to_component(w->dapm);
+	struct device *dev = comp->dev;
+	unsigned int enable;
+	int ret;
+
+	switch (event) {
+	case SND_SOC_DAPM_POST_PMU:
+		enable = 1;
+		break;
+	case SND_SOC_DAPM_POST_PMD:
+		enable = 0;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	ret = pm_runtime_resume_and_get(dev);
+	if (ret)
+		return ret;
+
+	/* AMPON bit is located in volatile RG, use pm_runtime to guarantee the RG access */
+	snd_soc_component_write_field(comp, RT9123_REG_AMPCTRL, RT9123_MASK_AMPON, enable);
+
+	pm_runtime_put_autosuspend(dev);
+
+	return 0;
+}
+
+static const struct snd_soc_dapm_widget rt9123_dapm_widgets[] = {
+	SND_SOC_DAPM_OUTPUT("SPK"),
+	SND_SOC_DAPM_OUT_DRV_E("Amp Drv", SND_SOC_NOPM, 0, 0, NULL, 0, rt9123_enable_event,
+			       SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_POST_PMD),
+};
+
+static const struct snd_soc_dapm_route rt9123_dapm_routes[] = {
+	{ "Amp Drv", NULL, "HiFi Playback" },
+	{ "SPK", NULL, "Amp Drv" },
+};
+
+static const DECLARE_TLV_DB_SCALE(dig_tlv, -10375, 25, 0);
+static const DECLARE_TLV_DB_RANGE(ana_tlv,
+				  0, 0, TLV_DB_SCALE_ITEM(-1200, 0, 0),
+				  1, 9, TLV_DB_SCALE_ITEM(0, 150, 0),
+				  10, 10, TLV_DB_SCALE_ITEM(1400, 0, 0));
+static const char * const pwmfreq_text[] = { "300KHz", "325KHz", "350KHz", "375KHz" };
+static const struct soc_enum rt9123_pwm_freq_enum =
+	SOC_ENUM_SINGLE(RT9123_REG_AMPCTRL, 4, ARRAY_SIZE(pwmfreq_text), pwmfreq_text);
+static const char * const i2sch_text[] = { "(L+R)/2", "LCH", "RCH", "(L+R)/2" };
+static const struct soc_enum rt9123_i2sch_select_enum =
+	SOC_ENUM_SINGLE(RT9123_REG_I2SOPT, 4, ARRAY_SIZE(i2sch_text), i2sch_text);
+
+static int rt9123_kcontrol_name_comp(struct snd_kcontrol *kcontrol, const char *s)
+{
+	struct snd_soc_component *comp = snd_kcontrol_chip(kcontrol);
+	const char *kctlname = kcontrol->id.name;
+
+	if (comp && comp->name_prefix)
+		kctlname += strlen(comp->name_prefix) + 1;
+
+	return strcmp(kctlname, s);
+}
+
+static int rt9123_xhandler_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_soc_component *comp = snd_kcontrol_chip(kcontrol);
+	struct device *dev = comp->dev;
+	int ret;
+
+	ret = pm_runtime_resume_and_get(dev);
+	if (ret)
+		return ret;
+
+	/*
+	 * Since the RG bitfield for 'Speaker Volume' and 'PWM Frequency Select' are located in
+	 * volatile RG address, special handling here with pm runtime API to guarantee RG read
+	 * operation.
+	 */
+	if (rt9123_kcontrol_name_comp(kcontrol, "Speaker Volume") == 0)
+		ret = snd_soc_get_volsw(kcontrol, ucontrol);
+	else
+		ret = snd_soc_get_enum_double(kcontrol, ucontrol);
+
+	if (ret < 0)
+		dev_err(dev, "Failed to get control (%d)\n", ret);
+
+	pm_runtime_put_autosuspend(dev);
+	return ret;
+}
+
+static int rt9123_xhandler_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_soc_component *comp = snd_kcontrol_chip(kcontrol);
+	struct device *dev = comp->dev;
+	int ret;
+
+	ret = pm_runtime_resume_and_get(dev);
+	if (ret)
+		return ret;
+
+	/*
+	 * Since the RG bitfield for 'Speaker Volume' and 'PWM Frequency Select' are located in
+	 * volatile RG address, special handling here with pm runtime API to guarantee RG write
+	 * operation.
+	 */
+	if (rt9123_kcontrol_name_comp(kcontrol, "Speaker Volume") == 0)
+		ret = snd_soc_put_volsw(kcontrol, ucontrol);
+	else
+		ret = snd_soc_put_enum_double(kcontrol, ucontrol);
+
+	if (ret < 0)
+		dev_err(dev, "Failed to put control (%d)\n", ret);
+
+	pm_runtime_put_autosuspend(dev);
+	return ret;
+}
+
+static const struct snd_kcontrol_new rt9123_controls[] = {
+	SOC_SINGLE_TLV("Master Volume", RT9123_REG_VOLGAIN, 2, 511, 1, dig_tlv),
+	SOC_SINGLE_EXT_TLV("Speaker Volume", RT9123_REG_AMPCTRL, 0, 10, 0, rt9123_xhandler_get,
+			   rt9123_xhandler_put, ana_tlv),
+	SOC_ENUM_EXT("PWM Frequency Select", rt9123_pwm_freq_enum, rt9123_xhandler_get,
+		     rt9123_xhandler_put),
+	SOC_ENUM("I2S CH Select", rt9123_i2sch_select_enum),
+	SOC_SINGLE("Silence Detect Switch", RT9123_REG_SILVOLEN, 14, 1, 0),
+};
+
+static const struct snd_soc_component_driver rt9123_comp_driver = {
+	.controls		= rt9123_controls,
+	.num_controls		= ARRAY_SIZE(rt9123_controls),
+	.dapm_widgets		= rt9123_dapm_widgets,
+	.num_dapm_widgets	= ARRAY_SIZE(rt9123_dapm_widgets),
+	.dapm_routes		= rt9123_dapm_routes,
+	.num_dapm_routes	= ARRAY_SIZE(rt9123_dapm_routes),
+	.use_pmdown_time	= 1,
+	.endianness		= 1,
+};
+
+static int rt9123_dai_set_format(struct snd_soc_dai *dai, unsigned int fmt)
+{
+	struct rt9123_priv *rt9123 = snd_soc_dai_get_drvdata(dai);
+
+	rt9123->dai_fmt = fmt;
+	return 0;
+}
+
+static int rt9123_dai_set_tdm_slot(struct snd_soc_dai *dai, unsigned int tx_mask,
+				   unsigned int rx_mask, int slots, int slot_width)
+{
+	struct rt9123_priv *rt9123 = snd_soc_dai_get_drvdata(dai);
+	struct snd_soc_component *comp = dai->component;
+	struct device *dev = dai->dev;
+	unsigned int rx_loc;
+
+	dev_dbg(dev, "(slots, slot_width) = (%d, %d), (txmask, rxmask) = 0x%x, 0x%x\n", slots,
+		slot_width, tx_mask, rx_mask);
+
+	if (slots <= 0 || slot_width <= 0 || slots % 2 || slot_width % 8 ||
+			slots * slot_width > 256) {
+		dev_err(dev, "Invalid slot parameter (%d, %d)\n", slots, slot_width);
+		return -EINVAL;
+	}
+
+	if (!rx_mask || hweight_long(rx_mask) > 1 || ffs(rx_mask) > slots) {
+		dev_err(dev, "Invalid rx_mask 0x%08x, slots = %d\n", rx_mask, slots);
+		return -EINVAL;
+	}
+
+	/* Configure rx channel data location */
+	rx_loc = (ffs(rx_mask) - 1) * slot_width / 8;
+	snd_soc_component_write_field(comp, RT9123_REG_TDMRX, RT9123_MASK_TDMRXLOC, rx_loc);
+
+	rt9123->tdm_slots = slots;
+	rt9123->tdm_slot_width = slot_width;
+
+	return 0;
+}
+
+static int rt9123_dai_hw_params(struct snd_pcm_substream *substream,
+				struct snd_pcm_hw_params *param, struct snd_soc_dai *dai)
+{
+	struct rt9123_priv *rt9123 = snd_soc_dai_get_drvdata(dai);
+	struct snd_soc_component *comp = dai->component;
+	unsigned int fmtval, width, slot_width;
+	struct device *dev = dai->dev;
+	unsigned int audfmt, audbit;
+
+	fmtval = FIELD_GET(SND_SOC_DAIFMT_FORMAT_MASK, rt9123->dai_fmt);
+	if (rt9123->tdm_slots && fmtval != SND_SOC_DAIFMT_DSP_A && fmtval != SND_SOC_DAIFMT_DSP_B) {
+		dev_err(dev, "TDM only can support DSP_A or DSP_B format\n");
+		return -EINVAL;
+	}
+
+	switch (fmtval) {
+	case SND_SOC_DAIFMT_I2S:
+		audfmt = 0;
+		break;
+	case SND_SOC_DAIFMT_LEFT_J:
+		audfmt = 1;
+		break;
+	case SND_SOC_DAIFMT_RIGHT_J:
+		audfmt = 2;
+		break;
+	case SND_SOC_DAIFMT_DSP_B:
+		audfmt = rt9123->tdm_slots ? 4 : 3;
+		break;
+	case SND_SOC_DAIFMT_DSP_A:
+		audfmt = rt9123->tdm_slots ? 12 : 11;
+		break;
+	default:
+		dev_err(dev, "Unsupported format %d\n", fmtval);
+		return -EINVAL;
+	}
+
+	switch (width = params_width(param)) {
+	case 16:
+		audbit = 0;
+		break;
+	case 20:
+		audbit = 1;
+		break;
+	case 24:
+		audbit = 2;
+		break;
+	case 32:
+		audbit = 3;
+		break;
+	case 8:
+		audbit = 4;
+		break;
+	default:
+		dev_err(dev, "Unsupported width %d\n", width);
+		return -EINVAL;
+	}
+
+	slot_width = params_physical_width(param);
+	if (rt9123->tdm_slots && slot_width > rt9123->tdm_slot_width) {
+		dev_err(dev, "Slot width is larger than TDM slot width\n");
+		return -EINVAL;
+	}
+
+	snd_soc_component_write_field(comp, RT9123_REG_I2SOPT, RT9123_MASK_AUDFMT, audfmt);
+	snd_soc_component_write_field(comp, RT9123_REG_I2SOPT, RT9123_MASK_AUDBIT, audbit);
+
+	return 0;
+}
+
+static const struct snd_soc_dai_ops rt9123_dai_ops = {
+	.set_fmt	= rt9123_dai_set_format,
+	.set_tdm_slot	= rt9123_dai_set_tdm_slot,
+	.hw_params	= rt9123_dai_hw_params,
+};
+
+static struct snd_soc_dai_driver rt9123_dai_driver = {
+	.name = "HiFi",
+	.playback = {
+		.stream_name	= "HiFi Playback",
+		.formats	= SNDRV_PCM_FMTBIT_S16 | SNDRV_PCM_FMTBIT_S24 |
+				  SNDRV_PCM_FMTBIT_S32,
+		.rates		= SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000 |
+				  SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_24000 |
+				  SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 |
+				  SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 |
+				  SNDRV_PCM_RATE_96000,
+		.rate_min	= 8000,
+		.rate_max	= 96000,
+		.channels_min	= 1,
+		.channels_max	= 2,
+	},
+	.ops    = &rt9123_dai_ops,
+};
+
+static bool rt9123_readable_reg(struct device *dev, unsigned int reg)
+{
+	switch (reg) {
+	case 0x00 ... 0x05:
+	case 0x12 ... 0x13:
+	case 0x20 ... 0x21:
+	case 0x36:
+		return true;
+	default:
+		return false;
+	}
+}
+
+static bool rt9123_writeable_reg(struct device *dev, unsigned int reg)
+{
+	switch (reg) {
+	case 0x01 ... 0x05:
+	case 0x12 ... 0x13:
+	case 0x20 ... 0x21:
+		return true;
+	default:
+		return false;
+	}
+}
+
+static bool rt9123_volatile_reg(struct device *dev, unsigned int reg)
+{
+	switch (reg) {
+	case 0x01:
+	case 0x20:
+	case 0x36:
+		return true;
+	default:
+		return false;
+	}
+}
+
+static const struct regmap_config rt9123_regmap_config = {
+	.name			= "rt9123",
+	.reg_bits		= 8,
+	.val_bits		= 16,
+	.val_format_endian	= REGMAP_ENDIAN_BIG,
+	.readable_reg		= rt9123_readable_reg,
+	.writeable_reg		= rt9123_writeable_reg,
+	.volatile_reg		= rt9123_volatile_reg,
+	.cache_type		= REGCACHE_MAPLE,
+	.num_reg_defaults_raw	= RT9123_REG_ANAFLAG + 1,
+};
+
+static int rt9123_i2c_probe(struct i2c_client *i2c)
+{
+	struct device *dev = &i2c->dev;
+	struct rt9123_priv *rt9123;
+	struct regmap *regmap;
+	__be16 value;
+	u16 venid;
+	int ret;
+
+	rt9123 = devm_kzalloc(dev, sizeof(*rt9123), GFP_KERNEL);
+	if (!rt9123)
+		return -ENOMEM;
+
+	rt9123->enable = devm_gpiod_get_optional(dev, "enable", GPIOD_OUT_HIGH);
+	if (IS_ERR(rt9123->enable))
+		return PTR_ERR(rt9123->enable);
+	else if (rt9123->enable)
+		usleep_range(250, 350);
+	else
+		dev_dbg(dev, "No 'enable' GPIO specified, treat it as default on\n");
+
+	/* Check vendor id information */
+	ret = i2c_smbus_read_i2c_block_data(i2c, RT9123_REG_COMBOID, sizeof(value), (u8 *)&value);
+	if (ret < 0)
+		return dev_err_probe(dev, ret, "Failed to read vendor-id\n");
+
+	venid = be16_to_cpu(value);
+	if ((venid & RT9123_MASK_VENID) != RT9123_FIXED_VENID)
+		return dev_err_probe(dev, -ENODEV, "Incorrect vendor-id 0x%04x\n", venid);
+
+	/* Trigger RG reset before regmap init cache */
+	value = cpu_to_be16(RT9123_MASK_SWRST);
+	ret = i2c_smbus_write_i2c_block_data(i2c, RT9123_REG_AMPCTRL, sizeof(value), (u8 *)&value);
+	if (ret)
+		return dev_err_probe(dev, ret, "Failed to trigger RG reset\n");
+
+	/* Need to wait 10ms for the reset to complete */
+	usleep_range(10000, 11000);
+
+	regmap = devm_regmap_init_i2c(i2c, &rt9123_regmap_config);
+	if (IS_ERR(regmap))
+		return dev_err_probe(dev, PTR_ERR(regmap), "Failed to init regmap\n");
+
+	i2c_set_clientdata(i2c, rt9123);
+
+	pm_runtime_set_autosuspend_delay(dev, 500);
+	pm_runtime_use_autosuspend(dev);
+	pm_runtime_set_active(dev);
+	ret = devm_pm_runtime_enable(dev);
+	if (ret)
+		return dev_err_probe(dev, ret, "Failed to enable pm runtime\n");
+
+	return devm_snd_soc_register_component(dev, &rt9123_comp_driver, &rt9123_dai_driver, 1);
+}
+
+#ifdef CONFIG_PM
+static int rt9123_runtime_suspend(struct device *dev)
+{
+	struct rt9123_priv *rt9123 = dev_get_drvdata(dev);
+	struct regmap *regmap = dev_get_regmap(dev, NULL);
+
+	if (rt9123->enable) {
+		regcache_cache_only(regmap, true);
+		regcache_mark_dirty(regmap);
+		gpiod_set_value(rt9123->enable, 0);
+	}
+
+	return 0;
+}
+
+static int rt9123_runtime_resume(struct device *dev)
+{
+	struct rt9123_priv *rt9123 = dev_get_drvdata(dev);
+	struct regmap *regmap = dev_get_regmap(dev, NULL);
+	int ret;
+
+	if (rt9123->enable) {
+		gpiod_set_value(rt9123->enable, 1);
+		usleep_range(250, 350);
+
+		regcache_cache_only(regmap, false);
+		ret = regcache_sync(regmap);
+		if (ret)
+			return ret;
+	}
+
+	return 0;
+}
+#endif
+
+static const struct dev_pm_ops rt9123_dev_pm_ops = {
+	SET_RUNTIME_PM_OPS(rt9123_runtime_suspend, rt9123_runtime_resume, NULL)
+};
+
+#ifdef CONFIG_OF
+static const struct of_device_id rt9123_device_id[] = {
+	{ .compatible = "richtek,rt9123" },
+	{}
+};
+MODULE_DEVICE_TABLE(of, rt9123_device_id);
+#endif
+
+#ifdef CONFIG_ACPI
+static const struct acpi_device_id rt9123_acpi_match[] = {
+	{ "RT9123", 0 },
+	{}
+};
+MODULE_DEVICE_TABLE(acpi, rt9123_acpi_match);
+#endif
+
+static struct i2c_driver rt9123_i2c_driver = {
+	.driver = {
+		.name = "rt9123",
+		.of_match_table = of_match_ptr(rt9123_device_id),
+		.acpi_match_table = ACPI_PTR(rt9123_acpi_match),
+		.pm = pm_ptr(&rt9123_dev_pm_ops),
+	},
+	.probe	= rt9123_i2c_probe,
+};
+module_i2c_driver(rt9123_i2c_driver);
+
+MODULE_AUTHOR("ChiYuan Huang <cy_huang@richtek.com>");
+MODULE_DESCRIPTION("ASoC rt9123 Driver");
+MODULE_LICENSE("GPL");