commit f77a066f ("ASoC: hdmi-codec: Allow playback and capture
to be disabled") added new no_i2s_playback/capture.
We need to zero clear HDMI pdata first, otherwise unexpected flag
will be added.

Fixes: f77a066f ("ASoC: hdmi-codec: Allow playback and capture to be disabled")
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Link: https://lore.kernel.org/r/87k01hlnqj.wl-kuninori.morimoto.gx@renesas.com


Signed-off-by: Mark Brown <broonie@kernel.org>

The "id" comes from the user.  Change the type to unsigned to prevent
an array underflow.

Fixes: f4ea22f7 ("ASoC: SOF: ipc4: Add support for mtrace log extraction")
Signed-off-by: Dan Carpenter <error27@gmail.com>
Acked-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
Link: https://lore.kernel.org/r/Y8laruWOEwOC/dx9@kili


Signed-off-by: Mark Brown <broonie@kernel.org>

Merge series from Peter Ujfalusi <peter.ujfalusi@linux.intel.com>:

This series contains one fix (first patch) followed by a nice to have safety
belts in case we get a widget from topology which is not handled by SOF and will
not have corresponding swidget associated with.

The existing code return when a widget doesn't need to
prepare/unprepare. This will prevent widgets in the sink path from being
prepared/unprepared.

Cc: <stable@vger.kernel.org> # 6.1
Link: https://github.com/thesofproject/linux/issues/4021


Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Rander Wang <rander.wang@intel.com>
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
Link: https://lore.kernel.org/r/20230118101255.29139-4-peter.ujfalusi@linux.intel.com


Signed-off-by: Mark Brown <broonie@kernel.org>

Skip preparing/unpreparing widgets if the swidget pointer is NULL. This
will be true in the case of virtual widgets in topology that were added
for reusing the legacy HDA machine driver with SOF.

Fixes: 9862dcf7 ("ASoC: SOF: don't unprepare widget used other pipelines")
Cc: <stable@vger.kernel.org> # 6.1
Signed-off-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
Reviewed-by: Rander Wang <rander.wang@intel.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Tested-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
Link: https://lore.kernel.org/r/20230118101255.29139-3-peter.ujfalusi@linux.intel.com


Signed-off-by: Mark Brown <broonie@kernel.org>

We should unprepare the widget if its use_count = 1.

Fixes: 9862dcf7 ("ASoC: SOF: don't unprepare widget used other pipelines")
Cc: <stable@vger.kernel.org> # 6.1
Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Rander Wang <rander.wang@intel.com>
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
Link: https://lore.kernel.org/r/20230118101255.29139-2-peter.ujfalusi@linux.intel.com


Signed-off-by: Mark Brown <broonie@kernel.org>

If there is a connection between a playback stream and a capture stream,
all widgets that are connected to the playback stream and the capture
stream will be in the list.
So, we have to start with the exactly right widget type.
snd_soc_dapm_aif_out is for capture stream and a playback stream should
start with a snd_soc_dapm_aif_in widget.
Contrarily, snd_soc_dapm_dai_in is for playback stream, and a capture
stream should start with a snd_soc_dapm_dai_out widget.

Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Reviewed-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>
Reviewed-by: Péter Ujfalusi <peter.ujfalusi@linux.intel.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
Link: https://lore.kernel.org/r/20230117123534.2075-1-peter.ujfalusi@linux.intel.com


Signed-off-by: Mark Brown <broonie@kernel.org>

On shutdown reference to i915 driver needs to be released to not spam
logs with unnecessary warnings. While at it do some additional cleanup
to make sure DSP is powered down and interrupts from device are
disabled.

Fixes: 1affc44e ("ASoC: Intel: avs: PCI driver implementation")
Reported-by: Kornel Dulęba <korneld@google.com>
Signed-off-by: Amadeusz Sławiński <amadeuszx.slawinski@linux.intel.com>
Reviewed-by: Cezary Rojewski <cezary.rojewski@intel.com>
Link: https://lore.kernel.org/r/20230113190310.1451693-2-amadeuszx.slawinski@linux.intel.com


Signed-off-by: Mark Brown <broonie@kernel.org>

Theoretically the device might gone if its reference count drops to 0.
This might be the case when we try to find the first physical node of
the ACPI device. We need to keep reference to it until we get a result
of the above mentioned call. Refactor the code to drop the reference
count at the correct place.

While at it, move to acpi_dev_put() as symmetrical call to the
acpi_dev_get_first_match_dev().

Fixes: a164137c ("ASoC: Intel: add machine driver for SOF+ES8336")
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20230112112852.67714-6-andriy.shevchenko@linux.intel.com


Signed-off-by: Mark Brown <broonie@kernel.org>

Theoretically the device might gone if its reference count drops to 0.
This might be the case when we try to find the first physical node of
the ACPI device. We need to keep reference to it until we get a result
of the above mentioned call. Refactor the code to drop the reference
count at the correct place.

While at it, move to acpi_dev_put() as symmetrical call to the
acpi_dev_get_first_match_dev().

Fixes: 9a87fc1e ("ASoC: Intel: bytcr_wm5102: Add machine driver for BYT/WM5102")
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20230112112852.67714-5-andriy.shevchenko@linux.intel.com


Signed-off-by: Mark Brown <broonie@kernel.org>

Theoretically the device might gone if its reference count drops to 0.
This might be the case when we try to find the first physical node of
the ACPI device. We need to keep reference to it until we get a result
of the above mentioned call. Refactor the code to drop the reference
count at the correct place.

While at it, move to acpi_dev_put() as symmetrical call to the
acpi_dev_get_first_match_dev().

Fixes: a232b96d ("ASoC: Intel: bytcr_rt5640: use HID translation util")
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20230112112852.67714-4-andriy.shevchenko@linux.intel.com


Signed-off-by: Mark Brown <broonie@kernel.org>

Theoretically the device might gone if its reference count drops to 0.
This might be the case when we try to find the first physical node of
the ACPI device. We need to keep reference to it until we get a result
of the above mentioned call. Refactor the code to drop the reference
count at the correct place.

While at it, move to acpi_dev_put() as symmetrical call to the
acpi_dev_get_first_match_dev().

Fixes: 02c0a3b3 ("ASoC: Intel: bytcr_rt5651: add MCLK, quirks and cleanups")
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20230112112852.67714-3-andriy.shevchenko@linux.intel.com


Signed-off-by: Mark Brown <broonie@kernel.org>

Theoretically the device might gone if its reference count drops to 0.
This might be the case when we try to find the first physical node of
the ACPI device. We need to keep reference to it until we get a result
of the above mentioned call. Refactor the code to drop the reference
count at the correct place.

While at it, move to acpi_dev_put() as symmetrical call to the
acpi_dev_get_first_match_dev().

Fixes: 3c22a73f ("ASoC: Intel: bytcht_es8316: fix HID handling")
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20230112112852.67714-2-andriy.shevchenko@linux.intel.com


Signed-off-by: Mark Brown <broonie@kernel.org>

Theoretically the device might gone if its reference count drops to 0.
This might be the case when we try to find the first physical node of
the ACPI device. We need to keep reference to it until we get a result
of the above mentioned call. Refactor the code to drop the reference
count at the correct place.

While at it, move to acpi_dev_put() as symmetrical call to the
acpi_dev_get_first_match_dev().

Fixes: 02527c3f ("ASoC: amd: add Machine driver for Jadeite platform")
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Vijendar Mukunda <Vijendar.Mukunda@amd.com>
Link: https://lore.kernel.org/r/20230112112356.67643-1-andriy.shevchenko@linux.intel.com


Signed-off-by: Mark Brown <broonie@kernel.org>

Adding DMI entries to support new acer/emdoor platforms.

Suggested-by: shanshengwang <shansheng.wang@amd.com>
Signed-off-by: Syed Saba Kareem <Syed.SabaKareem@amd.com>
Link: https://lore.kernel.org/r/20230111102130.2276391-1-Syed.SabaKareem@amd.com


Signed-off-by: Mark Brown <broonie@kernel.org>

The fsl-asoc-card AC'97 support currently tries to route to Playback and
Capture widgets provided by the AC'97 CODEC. This doesn't work since the
generic AC'97 driver registers with an "AC97" at the front of the stream
and hence widget names, update to reflect reality. It's not clear to me
if or how this ever worked.

Acked-by: Shengjiu Wang <shengjiu.wang@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20230106-asoc-udoo-probe-v1-2-a5d7469d4f67@kernel.org


Signed-off-by: Mark Brown <broonie@kernel.org>

The SSI driver calls the AC'97 playback and transmit streams "AC97 Playback"
and "AC97 Capture" respectively. This is the same name used by the generic
AC'97 CODEC driver in ASoC, creating confusion for the Freescale ASoC card
when it attempts to use these widgets in routing. Add a "CPU" in the name
like the regular DAIs registered by the driver to disambiguate.

Acked-by: Shengjiu Wang <shengjiu.wang@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20230106-asoc-udoo-probe-v1-1-a5d7469d4f67@kernel.org


Signed-off-by: Mark Brown <broonie@kernel.org>

On SC7280 ADSP bypassed platform, there are only three clocks for TX
macro.  This is already reflected in "clock-names" but not in "clocks"
property:

  sc7280-herobrine-zombie-lte.dtb: codec@3220000: clocks: [[219, 8], [219, 7], [220]] is too short

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20221225115907.55250-2-krzysztof.kozlowski@linaro.org


Signed-off-by: Mark Brown <broonie@kernel.org>

SM8250 DTS uses additional "va" clock in WSA macro device node:

  sm8250-sony-xperia-edo-pdx203.dtb: codec@3240000: clock-names: ['mclk', 'npl', 'macro', 'dcodec', 'va', 'fsgen'] is too long

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20221225115907.55250-1-krzysztof.kozlowski@linaro.org


Signed-off-by: Mark Brown <broonie@kernel.org>

Older Qualcomm platforms like APQ8016 do not have hardware support for
SoundWire, so kernel configurations made specifically for those platforms
will usually not have CONFIG_SOUNDWIRE enabled.

Unfortunately commit 8d89cf6f ("ASoC: qcom: cleanup and fix
dependency of QCOM_COMMON") breaks those kernel configurations, because
SOUNDWIRE is now a required dependency for SND_SOC_QCOM_COMMON (and in
turn also SND_SOC_APQ8016_SBC). Trying to migrate such a kernel config
silently disables SND_SOC_APQ8016_SBC and breaks audio functionality.

The soundwire helpers in common.c are only used by two of the Qualcomm
audio machine drivers, so building and requiring CONFIG_SOUNDWIRE for
all platforms is unnecessary.

There is no need to stuff all common code into a single module. Fix the
issue by moving the soundwire helpers to a separate SND_SOC_QCOM_SDW
module/option that is selected only by the machine drivers that make
use of them. This also allows reverting the imply/depends changes from
the previous fix because both SM8250 and SC8280XP already depend on
SOUNDWIRE, so the soundwire helpers will be only built if SOUNDWIRE
is really enabled.

Cc: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Fixes: 8d89cf6f ("ASoC: qcom: cleanup and fix dependency of QCOM_COMMON")
Signed-off-by: Stephan Gerhold <stephan@gerhold.net>
Link: https://lore.kernel.org/r/20221231115506.82991-1-stephan@gerhold.net


Signed-off-by: Mark Brown <broonie@kernel.org>

The parameter "max" of SOC_SINGLE_SX_TLV() means the number of steps
rather than maximum value. This patch corrects the minimum value to -8
and the number of steps to 15.

Signed-off-by: Chancel Liu <chancel.liu@nxp.com>
Acked-by: Shengjiu Wang <shengjiu.wang@gmail.com>
Link: https://lore.kernel.org/r/20230104025754.3019235-1-chancel.liu@nxp.com


Signed-off-by: Mark Brown <broonie@kernel.org>

These indices should reference the ID placed within the dai_driver
array, not the indices of the array itself.

This fixes commit 4ff028f6 ("ASoC: qcom: lpass-cpu: Make I2S SD
lines configurable"), which among others, broke IPQ8064 audio
(sound/soc/qcom/lpass-ipq806x.c) because it uses ID 4 but we'd stop
initializing the mi2s_playback_sd_mode and mi2s_capture_sd_mode arrays
at ID 0.

Fixes: 4ff028f6 ("ASoC: qcom: lpass-cpu: Make I2S SD lines configurable")
Cc: <stable@vger.kernel.org>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Reviewed-by: Stephan Gerhold <stephan@gerhold.net>
Link: https://lore.kernel.org/r/20221231061545.2110253-1-computersforpeace@gmail.com


Signed-off-by: Mark Brown <broonie@kernel.org>

Merge series from tongjian <tongjian@huaqin.corp-partner.google.com>:

Add MAX98360A for RT5682S, MAX98360A works same as rt1019. So, it can
be supported.

Restore volume after charge pump and PGA activation to ensure
that volume settings are correctly applied when re-enabling codec
from SND_SOC_BIAS_OFF state.
CLASS_W, CHARGE_PUMP and POWER_MANAGEMENT_2 register configuration
affect how the volume register are applied and must be configured first.

Fixes: a91eb199 ("ASoC: Initial WM8904 CODEC driver")
Link: https://lore.kernel.org/all/c7864c35-738c-a867-a6a6-ddf9f98df7e7@gmail.com/


Signed-off-by: Emanuele Ghidoli <emanuele.ghidoli@toradex.com>
Signed-off-by: Francesco Dolcini <francesco.dolcini@toradex.com>
Acked-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20221223080247.7258-1-francesco@dolcini.it


Signed-off-by: Mark Brown <broonie@kernel.org>

Signed-off-by: Mars Chen <chenxiangrui@huaqin.corp-partner.google.com>
Link: https://lore.kernel.org/r/20221228103812.450956-1-chenxiangrui@huaqin.corp-partner.google.com


Signed-off-by: Mark Brown <broonie@kernel.org>

ASUS VivoBook 13 OLED (M5402RA) needs this quirk to get the built-in microphone working properly.

Signed-off-by: Aniol Martí <aniol@aniolmarti.cat>
Link: https://lore.kernel.org/r/20221227224932.9771-1-aniol@aniolmarti.cat


Signed-off-by: Mark Brown <broonie@kernel.org>

RT9120 uses PM runtime autosuspend to decrease the frequently on/off
spent time. This exists one case, when pcm is closed and dev PM is
waiting for autosuspend time expired to enter runtime suspend state.
At the mean time, system is going to enter suspend, dev PM runtime
suspend won't be called. It makes the rt9120 suspend consumption
current not as expected.

This patch can fix the rt9120 dev PM issue during runtime autosuspend
and system suspend by binding dev PM runtime and ASoC component PM.

Fixes: 80b949f3 ("ASoC: rt9120: Use pm_runtime and regcache to optimize 'pwdnn' logic")
Signed-off-by: ChiYuan Huang <cy_huang@richtek.com>
Link: https://lore.kernel.org/r/1672301033-3675-1-git-send-email-u0084500@gmail.com


Signed-off-by: Mark Brown <broonie@kernel.org>

Add support for mt8186 with mt6366 and max98357a.

Signed-off-by: Allen-KH Cheng <allen-kh.cheng@mediatek.com>
Link: https://lore.kernel.org/r/20221228115756.28014-1-allen-kh.cheng@mediatek.com


Signed-off-by: Mark Brown <broonie@kernel.org>

Adds new compatible string "mt8186-mt6366-rt5682s-max98360-sound" for machines
with max98360a and rt5682s.

Signed-off-by: tongjian <tongjian@huaqin.corp-partner.google.com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20221228122230.3818533-3-tongjian@huaqin.corp-partner.google.com


Signed-off-by: Mark Brown <broonie@kernel.org>

Add support for using the rt5682s codec together with max98360a on
MT8186-MT6366-RT1019-RT5682S machines.

Signed-off-by: tongjian <tongjian@huaqin.corp-partner.google.com>
Link: https://lore.kernel.org/r/20221228122230.3818533-2-tongjian@huaqin.corp-partner.google.com


Signed-off-by: Mark Brown <broonie@kernel.org>

If the irq is enabled after the spi si registered, there can be a race
with the initialization of the devices on the spi bus.

Eg:
mtk-spi 1100a000.spi: spi-mem transfer timeout
spi-nor: probe of spi0.0 failed with error -110
Unable to handle kernel NULL pointer dereference at virtual address
0000000000000010
...
Call trace:
 mtk_spi_can_dma+0x0/0x2c

Fixes: c6f78746 ("spi: mediatek: Enable irq when pdata is ready")
Reported-by: Daniel Golle <daniel@makrotopia.org>
Signed-off-by: Ricardo Ribalda <ribalda@chromium.org>
Tested-by: Daniel Golle <daniel@makrotopia.org>
Link: https://lore.kernel.org/r/20221225-mtk-spi-fixes-v1-0-bb6c14c232f8@chromium.org


Signed-off-by: Mark Brown <broonie@kernel.org>

Merge series from Peter Ujfalusi <peter.ujfalusi@linux.intel.com>:

This series contails 2 patches to fix device suspend after a firmware
crash and another patch to allow reading the FW state from debugfs.

The maximum name length for a platform_device_id entry is 20 characters
including the trailing NUL byte. The sof_nau8825.c file exceeds that,
which causes an obscure error message:

sound/soc/intel/boards/snd-soc-sof_nau8825.mod.c:35:45: error: illegal character encoding in string literal [-Werror,-Winvalid-source-encoding]
MODULE_ALIAS("platform:adl_max98373_nau8825<U+0018><AA>");
                                                   ^~~~
include/linux/module.h:168:49: note: expanded from macro 'MODULE_ALIAS'
                                                ^~~~~~
include/linux/module.h:165:56: note: expanded from macro 'MODULE_INFO'
                                                       ^~~~
include/linux/moduleparam.h:26:47: note: expanded from macro '__MODULE_INFO'
                = __MODULE_INFO_PREFIX __stringify(tag) "=" info

I could not figure out how to make the module handling robust enough
to handle this better, but as a quick fix, using slightly shorter
names that are still unique avoids the build issue.

Fixes: 8d0872f6 ("ASoC: Intel: add sof-nau8825 machine driver")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20221221132515.2363276-1-arnd@kernel.org


Signed-off-by: Mark Brown <broonie@kernel.org>

The snd-soc-sof_nau8825.ko module fails to link unless the
sof_realtek_common support is also enabled:

ERROR: modpost: "sof_rt1015p_codec_conf" [sound/soc/intel/boards/snd-soc-sof_nau8825.ko] undefined!
ERROR: modpost: "sof_rt1015p_dai_link" [sound/soc/intel/boards/snd-soc-sof_nau8825.ko] undefined!

Fixes: 8d0872f6 ("ASoC: Intel: add sof-nau8825 machine driver")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20221221132559.2402341-1-arnd@kernel.org


Signed-off-by: Mark Brown <broonie@kernel.org>

This patch adds the driver data for two nau8318 speaker amplifiers on
SSP1 and nau8825 on SSP0 for ADL platform.

The nau8315 and nau8318 are both Nuvoton Amp chips. They use the same
Amp driver nau8315.c. The acpi_device_id for nau8315 is "NVTN2010",
for nau8318 is "NVTN2012".
The nau8825 is one of Nuvoton headset codec, and its acpi_device_id is
"10508825".

Signed-off-by: Ajye Huang <ajye_huang@compal.corp-partner.google.com>
Acked-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20221222042624.557869-1-ajye_huang@compal.corp-partner.google.com


Signed-off-by: Mark Brown <broonie@kernel.org>

Razer Blade 14 (2022) - RZ09-0427 needs the quirk to enable the built in microphone

Signed-off-by: Wim Van Boven <wimvanboven@gmail.com>
Reviewed-by: Mario Limonciello <mario.limonciello@amd.com>
Link: https://lore.kernel.org/r/20221216081828.12382-1-wimvanboven@gmail.com


Signed-off-by: Mark Brown <broonie@kernel.org>

Support configuration with SoundWire RT1318 amplifiers on link1 and
link2, and RT711 on link0 for headphone/headset. This product does
not support local microphones.

Signed-off-by: Gongjun Song <gongjun.song@intel.com>
Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Link: https://lore.kernel.org/r/20221226010917.2632973-2-yung-chuan.liao@linux.intel.com


Signed-off-by: Mark Brown <broonie@kernel.org>

Support configuration with SoundWire RT1316 amplifiers on link0 and
link1, and RT711 on link2 for headphone/headset. This product does
not support local microphones.

Signed-off-by: Gongjun Song <gongjun.song@intel.com>
Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Link: https://lore.kernel.org/r/20221226010917.2632973-1-yung-chuan.liao@linux.intel.com


Signed-off-by: Mark Brown <broonie@kernel.org>

Due to several bugs caused by timers being re-armed after they are
shutdown and just before they are freed, a new state of timers was added
called "shutdown".  After a timer is set to this state, then it can no
longer be re-armed.

The following script was run to find all the trivial locations where
del_timer() or del_timer_sync() is called in the same function that the
object holding the timer is freed.  It also ignores any locations where
the timer->function is modified between the del_timer*() and the free(),
as that is not considered a "trivial" case.

This was created by using a coccinelle script and the following
commands:

    $ cat timer.cocci
    @@
    expression ptr, slab;
    identifier timer, rfield;
    @@
    (
    -       del_timer(&ptr->timer);
    +       timer_shutdown(&ptr->timer);
    |
    -       del_timer_sync(&ptr->timer);
    +       timer_shutdown_sync(&ptr->timer);
    )
      ... when strict
          when != ptr->timer
    (
            kfree_rcu(ptr, rfield);
    |
            kmem_cache_free(slab, ptr);
    |
            kfree(ptr);
    )

    $ spatch timer.cocci . > /tmp/t.patch
    $ patch -p1 < /tmp/t.patch

Link: https://lore.kernel.org/lkml/20221123201306.823305113@linutronix.de/


Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Acked-by: Pavel Machek <pavel@ucw.cz> [ LED ]
Acked-by: Kalle Valo <kvalo@kernel.org> [ wireless ]
Acked-by: Paolo Abeni <pabeni@redhat.com> [ networking ]
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>