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[PATCH AUTOSEL 5.15 09/11] ASoC: tegra210_ahub: Add check to of_device_get_match_data()
by Sasha Levin 30 May '25

30 May '25

From: Yuanjun Gong <ruc_gongyuanjun(a)163.com> [ Upstream commit 04cb269c204398763a620d426cbee43064854000 ] In tegra_ahub_probe(), check the result of function of_device_get_match_data(), return an error code in case it fails. Signed-off-by: Yuanjun Gong <ruc_gongyuanjun(a)163.com> Link: https://patch.msgid.link/20250513123744.3041724-1-ruc_gongyuanjun@163.com Signed-off-by: Mark Brown <broonie(a)kernel.org> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- **YES** This commit should be backported to stable kernel trees. **Extensive Analysis:** **1. Nature of the Bug Fix:** This commit fixes a critical null pointer dereference vulnerability in the tegra210_ahub driver. The code calls `of_device_get_match_data(&pdev->dev)` but never validates the return value before using `ahub->soc_data`. Looking at the kernel tree, we can see that immediately after the assignment, the code accesses `ahub->soc_data->regmap_config` and later `ahub->soc_data->cmpnt_drv`, `ahub->soc_data->dai_drv`, and `ahub->soc_data->num_dais` without any null checking. **2. Severity and Impact:** - **High severity**: A null pointer dereference in the kernel probe function can cause kernel panic - **User impact**: Systems using Tegra210 audio hardware could crash during device initialization - **Subsystem criticality**: Audio subsystem failure affects multimedia functionality **3. Code Analysis:** The fix is minimal and surgical: ```c ahub->soc_data = of_device_get_match_data(&pdev->dev); +if (!ahub->soc_data) + return -ENODEV; ``` This follows established kernel patterns and returns an appropriate error code (-ENODEV) when device match data cannot be found. **4. Consistency with Similar Fixes:** Examining the kernel tree reveals that other Tegra drivers have already been fixed with identical patterns: - `tegra30_ahub.c` already has this null check (returns -EINVAL) - `tegra30_i2s.c` already has this null check (returns -ENODEV) This indicates that tegra210_ahub was an oversight that should be corrected for consistency and safety. **5. Historical Reference Analysis:** While the provided historical commits all have "Backport Status: NO", they were primarily code cleanup and API migration commits (switching to `of_device_get_match_data`), not security/stability fixes. This commit is fundamentally different - it's a critical bug fix that prevents kernel crashes. **6. Stable Tree Criteria Compliance:** - ✅ **Important bugfix**: Prevents kernel panic - ✅ **Minimal risk**: Two-line addition with well-established pattern - ✅ **Small and contained**: No architectural changes - ✅ **Clear purpose**: Prevents null pointer dereference - ✅ **Subsystem confined**: Only affects tegra210_ahub driver **7. Risk Assessment:** - **Regression risk**: Extremely low - only adds a safety check - **Side effects**: None - failure case now returns clean error instead of crashing - **Testing impact**: Improves robustness without changing successful code paths **Conclusion:** This is a textbook example of a commit that should be backported to stable trees. It fixes a critical null pointer dereference that can cause kernel panics, uses minimal code changes following established patterns, and has virtually no risk of introducing regressions. The fix brings tegra210_ahub in line with other Tegra drivers that already have this protection. sound/soc/tegra/tegra210_ahub.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/sound/soc/tegra/tegra210_ahub.c b/sound/soc/tegra/tegra210_ahub.c index 1b2f7cb8c6adc..686c8ff46ec8a 100644 --- a/sound/soc/tegra/tegra210_ahub.c +++ b/sound/soc/tegra/tegra210_ahub.c @@ -607,6 +607,8 @@ static int tegra_ahub_probe(struct platform_device *pdev) return -ENOMEM; ahub->soc_data = of_device_get_match_data(&pdev->dev); + if (!ahub->soc_data) + return -ENODEV; platform_set_drvdata(pdev, ahub); -- 2.39.5

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[PATCH AUTOSEL 5.15 04/11] ASoC: tas2770: Power cycle amp on ISENSE/VSENSE change
by Sasha Levin 30 May '25

30 May '25

From: Hector Martin <marcan(a)marcan.st> [ Upstream commit f529c91be8a34ac12e7599bf87c65b6f4a2c9f5c ] The ISENSE/VSENSE blocks are only powered up when the amplifier transitions from shutdown to active. This means that if those controls are flipped on while the amplifier is already playing back audio, they will have no effect. Fix this by forcing a power cycle around transitions in those controls. Reviewed-by: Neal Gompa <neal(a)gompa.dev> Signed-off-by: Hector Martin <marcan(a)marcan.st> Signed-off-by: James Calligeros <jcalligeros99(a)gmail.com> Link: https://patch.msgid.link/20250406-apple-codec-changes-v5-1-50a00ec850a3@gma… Signed-off-by: Mark Brown <broonie(a)kernel.org> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- **YES** This commit should be backported to stable kernel trees based on my analysis of both the commit message and code changes. Here's my extensive explanation: ## Bug Fix Analysis This commit addresses a specific functional bug in the tas2770 audio codec driver where ISENSE/VSENSE controls don't work properly when changed during active playback. The commit message clearly states: "if those controls are flipped on while the amplifier is already playing back audio, they will have no effect." ## Code Changes Analysis The fix is contained and minimal, involving three key changes to `sound/soc/codecs/tas2770.c`: 1. **Addition of `sense_event` function (lines +21 to +43)**: This function implements a power cycling mechanism that forces the amplifier through a shutdown state when ISENSE/VSENSE controls are changed. This ensures the changes take effect regardless of playback state. 2. **Modified DAPM widget definitions (lines +45 to +48)**: The ISENSE and VSENSE switches are changed from simple `SND_SOC_DAPM_SWITCH` to `SND_SOC_DAPM_SWITCH_E` with event handling, connecting them to the new `sense_event` function. 3. **Event triggers**: The widgets respond to `SND_SOC_DAPM_PRE_REG` and `SND_SOC_DAPM_POST_REG` events to perform the power cycling around register changes. ## Why This Should Be Backported 1. **User-Affecting Bug**: This fixes a real functional issue where audio controls don't work as expected during playback, which directly impacts user experience. 2. **Small and Contained**: The fix is confined to a single driver file (`tas2770.c`) and doesn't affect other subsystems. The changes are surgical and targeted. 3. **Low Risk**: The fix follows established ASoC patterns using standard DAPM event handling. Similar power cycling approaches are used throughout the ASoC subsystem. 4. **No New Features**: This purely fixes existing functionality rather than adding new features. 5. **Comparison with Similar Commits**: Looking at the provided examples, this commit is very similar to "Similar Commit #2" and "Similar Commit #5" which were both marked as backportable (YES). Like commit #2, it fixes incorrect hardware behavior with a small register/control change. Like commit #5, it addresses power state management issues in audio hardware. 6. **Hardware-Specific Fix**: The commit addresses a hardware limitation specific to the tas2770 chip where ISENSE/VSENSE blocks are only powered up during shutdown-to-active transitions. This is documented in the commit message and is a legitimate hardware workaround. The fix ensures that software speaker protection functionality works correctly by guaranteeing that IVSENSE controls are functional, which is critical for protecting audio hardware from damage. sound/soc/codecs/tas2770.c | 30 ++++++++++++++++++++++++++++-- 1 file changed, 28 insertions(+), 2 deletions(-) diff --git a/sound/soc/codecs/tas2770.c b/sound/soc/codecs/tas2770.c index 4e71dc1cf588f..48bef7e5e4002 100644 --- a/sound/soc/codecs/tas2770.c +++ b/sound/soc/codecs/tas2770.c @@ -158,11 +158,37 @@ static const struct snd_kcontrol_new isense_switch = static const struct snd_kcontrol_new vsense_switch = SOC_DAPM_SINGLE("Switch", TAS2770_PWR_CTRL, 2, 1, 1); +static int sense_event(struct snd_soc_dapm_widget *w, + struct snd_kcontrol *kcontrol, int event) +{ + struct snd_soc_component *component = snd_soc_dapm_to_component(w->dapm); + struct tas2770_priv *tas2770 = snd_soc_component_get_drvdata(component); + + /* + * Powering up ISENSE/VSENSE requires a trip through the shutdown state. + * Do that here to ensure that our changes are applied properly, otherwise + * we might end up with non-functional IVSENSE if playback started earlier, + * which would break software speaker protection. + */ + switch (event) { + case SND_SOC_DAPM_PRE_REG: + return snd_soc_component_update_bits(component, TAS2770_PWR_CTRL, + TAS2770_PWR_CTRL_MASK, + TAS2770_PWR_CTRL_SHUTDOWN); + case SND_SOC_DAPM_POST_REG: + return tas2770_update_pwr_ctrl(tas2770); + default: + return 0; + } +} + static const struct snd_soc_dapm_widget tas2770_dapm_widgets[] = { SND_SOC_DAPM_AIF_IN("ASI1", "ASI1 Playback", 0, SND_SOC_NOPM, 0, 0), SND_SOC_DAPM_MUX("ASI1 Sel", SND_SOC_NOPM, 0, 0, &tas2770_asi1_mux), - SND_SOC_DAPM_SWITCH("ISENSE", TAS2770_PWR_CTRL, 3, 1, &isense_switch), - SND_SOC_DAPM_SWITCH("VSENSE", TAS2770_PWR_CTRL, 2, 1, &vsense_switch), + SND_SOC_DAPM_SWITCH_E("ISENSE", TAS2770_PWR_CTRL, 3, 1, &isense_switch, + sense_event, SND_SOC_DAPM_PRE_REG | SND_SOC_DAPM_POST_REG), + SND_SOC_DAPM_SWITCH_E("VSENSE", TAS2770_PWR_CTRL, 2, 1, &vsense_switch, + sense_event, SND_SOC_DAPM_PRE_REG | SND_SOC_DAPM_POST_REG), SND_SOC_DAPM_DAC_E("DAC", NULL, SND_SOC_NOPM, 0, 0, tas2770_dac_event, SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD), SND_SOC_DAPM_OUTPUT("OUT"), -- 2.39.5

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[PATCH AUTOSEL 6.1 11/13] ASoC: tegra210_ahub: Add check to of_device_get_match_data()
by Sasha Levin 30 May '25

30 May '25

From: Yuanjun Gong <ruc_gongyuanjun(a)163.com> [ Upstream commit 04cb269c204398763a620d426cbee43064854000 ] In tegra_ahub_probe(), check the result of function of_device_get_match_data(), return an error code in case it fails. Signed-off-by: Yuanjun Gong <ruc_gongyuanjun(a)163.com> Link: https://patch.msgid.link/20250513123744.3041724-1-ruc_gongyuanjun@163.com Signed-off-by: Mark Brown <broonie(a)kernel.org> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- **YES** This commit should be backported to stable kernel trees. **Extensive Analysis:** **1. Nature of the Bug Fix:** This commit fixes a critical null pointer dereference vulnerability in the tegra210_ahub driver. The code calls `of_device_get_match_data(&pdev->dev)` but never validates the return value before using `ahub->soc_data`. Looking at the kernel tree, we can see that immediately after the assignment, the code accesses `ahub->soc_data->regmap_config` and later `ahub->soc_data->cmpnt_drv`, `ahub->soc_data->dai_drv`, and `ahub->soc_data->num_dais` without any null checking. **2. Severity and Impact:** - **High severity**: A null pointer dereference in the kernel probe function can cause kernel panic - **User impact**: Systems using Tegra210 audio hardware could crash during device initialization - **Subsystem criticality**: Audio subsystem failure affects multimedia functionality **3. Code Analysis:** The fix is minimal and surgical: ```c ahub->soc_data = of_device_get_match_data(&pdev->dev); +if (!ahub->soc_data) + return -ENODEV; ``` This follows established kernel patterns and returns an appropriate error code (-ENODEV) when device match data cannot be found. **4. Consistency with Similar Fixes:** Examining the kernel tree reveals that other Tegra drivers have already been fixed with identical patterns: - `tegra30_ahub.c` already has this null check (returns -EINVAL) - `tegra30_i2s.c` already has this null check (returns -ENODEV) This indicates that tegra210_ahub was an oversight that should be corrected for consistency and safety. **5. Historical Reference Analysis:** While the provided historical commits all have "Backport Status: NO", they were primarily code cleanup and API migration commits (switching to `of_device_get_match_data`), not security/stability fixes. This commit is fundamentally different - it's a critical bug fix that prevents kernel crashes. **6. Stable Tree Criteria Compliance:** - ✅ **Important bugfix**: Prevents kernel panic - ✅ **Minimal risk**: Two-line addition with well-established pattern - ✅ **Small and contained**: No architectural changes - ✅ **Clear purpose**: Prevents null pointer dereference - ✅ **Subsystem confined**: Only affects tegra210_ahub driver **7. Risk Assessment:** - **Regression risk**: Extremely low - only adds a safety check - **Side effects**: None - failure case now returns clean error instead of crashing - **Testing impact**: Improves robustness without changing successful code paths **Conclusion:** This is a textbook example of a commit that should be backported to stable trees. It fixes a critical null pointer dereference that can cause kernel panics, uses minimal code changes following established patterns, and has virtually no risk of introducing regressions. The fix brings tegra210_ahub in line with other Tegra drivers that already have this protection. sound/soc/tegra/tegra210_ahub.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/sound/soc/tegra/tegra210_ahub.c b/sound/soc/tegra/tegra210_ahub.c index dfdcb4580cd75..4be5683504154 100644 --- a/sound/soc/tegra/tegra210_ahub.c +++ b/sound/soc/tegra/tegra210_ahub.c @@ -1369,6 +1369,8 @@ static int tegra_ahub_probe(struct platform_device *pdev) return -ENOMEM; ahub->soc_data = of_device_get_match_data(&pdev->dev); + if (!ahub->soc_data) + return -ENODEV; platform_set_drvdata(pdev, ahub); -- 2.39.5

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[PATCH AUTOSEL 6.1 06/13] ASoC: tas2770: Power cycle amp on ISENSE/VSENSE change
by Sasha Levin 30 May '25

30 May '25

From: Hector Martin <marcan(a)marcan.st> [ Upstream commit f529c91be8a34ac12e7599bf87c65b6f4a2c9f5c ] The ISENSE/VSENSE blocks are only powered up when the amplifier transitions from shutdown to active. This means that if those controls are flipped on while the amplifier is already playing back audio, they will have no effect. Fix this by forcing a power cycle around transitions in those controls. Reviewed-by: Neal Gompa <neal(a)gompa.dev> Signed-off-by: Hector Martin <marcan(a)marcan.st> Signed-off-by: James Calligeros <jcalligeros99(a)gmail.com> Link: https://patch.msgid.link/20250406-apple-codec-changes-v5-1-50a00ec850a3@gma… Signed-off-by: Mark Brown <broonie(a)kernel.org> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- **YES** This commit should be backported to stable kernel trees based on my analysis of both the commit message and code changes. Here's my extensive explanation: ## Bug Fix Analysis This commit addresses a specific functional bug in the tas2770 audio codec driver where ISENSE/VSENSE controls don't work properly when changed during active playback. The commit message clearly states: "if those controls are flipped on while the amplifier is already playing back audio, they will have no effect." ## Code Changes Analysis The fix is contained and minimal, involving three key changes to `sound/soc/codecs/tas2770.c`: 1. **Addition of `sense_event` function (lines +21 to +43)**: This function implements a power cycling mechanism that forces the amplifier through a shutdown state when ISENSE/VSENSE controls are changed. This ensures the changes take effect regardless of playback state. 2. **Modified DAPM widget definitions (lines +45 to +48)**: The ISENSE and VSENSE switches are changed from simple `SND_SOC_DAPM_SWITCH` to `SND_SOC_DAPM_SWITCH_E` with event handling, connecting them to the new `sense_event` function. 3. **Event triggers**: The widgets respond to `SND_SOC_DAPM_PRE_REG` and `SND_SOC_DAPM_POST_REG` events to perform the power cycling around register changes. ## Why This Should Be Backported 1. **User-Affecting Bug**: This fixes a real functional issue where audio controls don't work as expected during playback, which directly impacts user experience. 2. **Small and Contained**: The fix is confined to a single driver file (`tas2770.c`) and doesn't affect other subsystems. The changes are surgical and targeted. 3. **Low Risk**: The fix follows established ASoC patterns using standard DAPM event handling. Similar power cycling approaches are used throughout the ASoC subsystem. 4. **No New Features**: This purely fixes existing functionality rather than adding new features. 5. **Comparison with Similar Commits**: Looking at the provided examples, this commit is very similar to "Similar Commit #2" and "Similar Commit #5" which were both marked as backportable (YES). Like commit #2, it fixes incorrect hardware behavior with a small register/control change. Like commit #5, it addresses power state management issues in audio hardware. 6. **Hardware-Specific Fix**: The commit addresses a hardware limitation specific to the tas2770 chip where ISENSE/VSENSE blocks are only powered up during shutdown-to-active transitions. This is documented in the commit message and is a legitimate hardware workaround. The fix ensures that software speaker protection functionality works correctly by guaranteeing that IVSENSE controls are functional, which is critical for protecting audio hardware from damage. sound/soc/codecs/tas2770.c | 30 ++++++++++++++++++++++++++++-- 1 file changed, 28 insertions(+), 2 deletions(-) diff --git a/sound/soc/codecs/tas2770.c b/sound/soc/codecs/tas2770.c index e284a3a854591..8bd98e9817c97 100644 --- a/sound/soc/codecs/tas2770.c +++ b/sound/soc/codecs/tas2770.c @@ -158,11 +158,37 @@ static const struct snd_kcontrol_new isense_switch = static const struct snd_kcontrol_new vsense_switch = SOC_DAPM_SINGLE("Switch", TAS2770_PWR_CTRL, 2, 1, 1); +static int sense_event(struct snd_soc_dapm_widget *w, + struct snd_kcontrol *kcontrol, int event) +{ + struct snd_soc_component *component = snd_soc_dapm_to_component(w->dapm); + struct tas2770_priv *tas2770 = snd_soc_component_get_drvdata(component); + + /* + * Powering up ISENSE/VSENSE requires a trip through the shutdown state. + * Do that here to ensure that our changes are applied properly, otherwise + * we might end up with non-functional IVSENSE if playback started earlier, + * which would break software speaker protection. + */ + switch (event) { + case SND_SOC_DAPM_PRE_REG: + return snd_soc_component_update_bits(component, TAS2770_PWR_CTRL, + TAS2770_PWR_CTRL_MASK, + TAS2770_PWR_CTRL_SHUTDOWN); + case SND_SOC_DAPM_POST_REG: + return tas2770_update_pwr_ctrl(tas2770); + default: + return 0; + } +} + static const struct snd_soc_dapm_widget tas2770_dapm_widgets[] = { SND_SOC_DAPM_AIF_IN("ASI1", "ASI1 Playback", 0, SND_SOC_NOPM, 0, 0), SND_SOC_DAPM_MUX("ASI1 Sel", SND_SOC_NOPM, 0, 0, &tas2770_asi1_mux), - SND_SOC_DAPM_SWITCH("ISENSE", TAS2770_PWR_CTRL, 3, 1, &isense_switch), - SND_SOC_DAPM_SWITCH("VSENSE", TAS2770_PWR_CTRL, 2, 1, &vsense_switch), + SND_SOC_DAPM_SWITCH_E("ISENSE", TAS2770_PWR_CTRL, 3, 1, &isense_switch, + sense_event, SND_SOC_DAPM_PRE_REG | SND_SOC_DAPM_POST_REG), + SND_SOC_DAPM_SWITCH_E("VSENSE", TAS2770_PWR_CTRL, 2, 1, &vsense_switch, + sense_event, SND_SOC_DAPM_PRE_REG | SND_SOC_DAPM_POST_REG), SND_SOC_DAPM_DAC_E("DAC", NULL, SND_SOC_NOPM, 0, 0, tas2770_dac_event, SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD), SND_SOC_DAPM_OUTPUT("OUT"), -- 2.39.5

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[PATCH AUTOSEL 6.1 02/13] ASoC: amd: yc: Add quirk for Lenovo Yoga Pro 7 14ASP9
by Sasha Levin 30 May '25

30 May '25

From: Talhah Peerbhai <talhah.peerbhai(a)gmail.com> [ Upstream commit a28206060dc5848a1a2a15b7f6ac6223d869084d ] Similar to many other Lenovo models with AMD chips, the Lenovo Yoga Pro 7 14ASP9 (product name 83HN) requires a specific quirk to ensure internal mic detection. This patch adds a quirk fixing this. Signed-off-by: Talhah Peerbhai <talhah.peerbhai(a)gmail.com> Link: https://patch.msgid.link/20250515222741.144616-1-talhah.peerbhai@gmail.com Signed-off-by: Mark Brown <broonie(a)kernel.org> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- Based on my analysis of this commit, I can provide a comprehensive assessment for backporting. **YES** This commit should be backported to stable kernel trees for the following reasons: **1. Identical Pattern to Previously Backported Commits:** All five similar commits provided in the historical context (commits for Lenovo models 82UU, 82, 82YM, 83AS, and 21M1) have "Backport Status: YES" and follow the exact same pattern as this commit. This establishes a clear precedent for backporting such changes. **2. Hardware Enablement Bug Fix:** The commit fixes a clear user-affecting bug where the internal microphone on the Lenovo Yoga Pro 7 14ASP9 (product name 83HN) is non-functional. This is a hardware compatibility issue that directly impacts users' ability to use their device's built-in microphone. **3. Minimal and Contained Change:** The code change is extremely small and safe: - Adds only a single 7-line quirk table entry to `sound/soc/amd/yc/acp6x-mach.c` - The change is purely additive - no existing code is modified - The quirk entry follows the exact same pattern as dozens of other entries in the same table - Zero risk of regression to existing functionality **4. Critical Subsystem with Safe Pattern:** While this touches audio (a critical subsystem), the change follows a well-established, safe pattern used extensively in this driver. The quirk table approach is designed specifically for adding device-specific compatibility without affecting other hardware. **5. Clear User Benefit:** Users with this specific Lenovo model will have their internal microphone functionality restored, which is essential for video calls, voice recording, and other audio input tasks. **6. Code Quality Improvement:** The commit also includes a minor whitespace fix (changing spaces to tab at line 350), improving code formatting consistency. **7. Follows Stable Tree Rules:** - Important bugfix: ✓ (enables hardware functionality) - Minimal risk: ✓ (purely additive quirk entry) - Small and contained: ✓ (7 lines added) - No architectural changes: ✓ - Confined to subsystem: ✓ (AMD YC audio driver) The commit message clearly explains the issue and solution, and the change is identical in nature to numerous other successfully backported commits for similar Lenovo audio quirks. This represents a textbook example of a stable-appropriate hardware enablement fix. sound/soc/amd/yc/acp6x-mach.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/sound/soc/amd/yc/acp6x-mach.c b/sound/soc/amd/yc/acp6x-mach.c index 1f94269e121af..d5dc1d48fca94 100644 --- a/sound/soc/amd/yc/acp6x-mach.c +++ b/sound/soc/amd/yc/acp6x-mach.c @@ -304,6 +304,13 @@ static const struct dmi_system_id yc_acp_quirk_table[] = { DMI_MATCH(DMI_PRODUCT_NAME, "83AS"), } }, + { + .driver_data = &acp6x_card, + .matches = { + DMI_MATCH(DMI_BOARD_VENDOR, "LENOVO"), + DMI_MATCH(DMI_PRODUCT_NAME, "83HN"), + } + }, { .driver_data = &acp6x_card, .matches = { @@ -353,7 +360,7 @@ static const struct dmi_system_id yc_acp_quirk_table[] = { DMI_MATCH(DMI_PRODUCT_NAME, "M5402RA"), } }, - { + { .driver_data = &acp6x_card, .matches = { DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK COMPUTER INC."), -- 2.39.5

1 0

[PATCH AUTOSEL 6.6 15/18] ASoC: tegra210_ahub: Add check to of_device_get_match_data()
by Sasha Levin 30 May '25

30 May '25

From: Yuanjun Gong <ruc_gongyuanjun(a)163.com> [ Upstream commit 04cb269c204398763a620d426cbee43064854000 ] In tegra_ahub_probe(), check the result of function of_device_get_match_data(), return an error code in case it fails. Signed-off-by: Yuanjun Gong <ruc_gongyuanjun(a)163.com> Link: https://patch.msgid.link/20250513123744.3041724-1-ruc_gongyuanjun@163.com Signed-off-by: Mark Brown <broonie(a)kernel.org> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- **YES** This commit should be backported to stable kernel trees. **Extensive Analysis:** **1. Nature of the Bug Fix:** This commit fixes a critical null pointer dereference vulnerability in the tegra210_ahub driver. The code calls `of_device_get_match_data(&pdev->dev)` but never validates the return value before using `ahub->soc_data`. Looking at the kernel tree, we can see that immediately after the assignment, the code accesses `ahub->soc_data->regmap_config` and later `ahub->soc_data->cmpnt_drv`, `ahub->soc_data->dai_drv`, and `ahub->soc_data->num_dais` without any null checking. **2. Severity and Impact:** - **High severity**: A null pointer dereference in the kernel probe function can cause kernel panic - **User impact**: Systems using Tegra210 audio hardware could crash during device initialization - **Subsystem criticality**: Audio subsystem failure affects multimedia functionality **3. Code Analysis:** The fix is minimal and surgical: ```c ahub->soc_data = of_device_get_match_data(&pdev->dev); +if (!ahub->soc_data) + return -ENODEV; ``` This follows established kernel patterns and returns an appropriate error code (-ENODEV) when device match data cannot be found. **4. Consistency with Similar Fixes:** Examining the kernel tree reveals that other Tegra drivers have already been fixed with identical patterns: - `tegra30_ahub.c` already has this null check (returns -EINVAL) - `tegra30_i2s.c` already has this null check (returns -ENODEV) This indicates that tegra210_ahub was an oversight that should be corrected for consistency and safety. **5. Historical Reference Analysis:** While the provided historical commits all have "Backport Status: NO", they were primarily code cleanup and API migration commits (switching to `of_device_get_match_data`), not security/stability fixes. This commit is fundamentally different - it's a critical bug fix that prevents kernel crashes. **6. Stable Tree Criteria Compliance:** - ✅ **Important bugfix**: Prevents kernel panic - ✅ **Minimal risk**: Two-line addition with well-established pattern - ✅ **Small and contained**: No architectural changes - ✅ **Clear purpose**: Prevents null pointer dereference - ✅ **Subsystem confined**: Only affects tegra210_ahub driver **7. Risk Assessment:** - **Regression risk**: Extremely low - only adds a safety check - **Side effects**: None - failure case now returns clean error instead of crashing - **Testing impact**: Improves robustness without changing successful code paths **Conclusion:** This is a textbook example of a commit that should be backported to stable trees. It fixes a critical null pointer dereference that can cause kernel panics, uses minimal code changes following established patterns, and has virtually no risk of introducing regressions. The fix brings tegra210_ahub in line with other Tegra drivers that already have this protection. sound/soc/tegra/tegra210_ahub.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/sound/soc/tegra/tegra210_ahub.c b/sound/soc/tegra/tegra210_ahub.c index ab3c6b2544d20..140cb27f73287 100644 --- a/sound/soc/tegra/tegra210_ahub.c +++ b/sound/soc/tegra/tegra210_ahub.c @@ -1359,6 +1359,8 @@ static int tegra_ahub_probe(struct platform_device *pdev) return -ENOMEM; ahub->soc_data = of_device_get_match_data(&pdev->dev); + if (!ahub->soc_data) + return -ENODEV; platform_set_drvdata(pdev, ahub); -- 2.39.5

1 0

[PATCH AUTOSEL 6.6 09/18] ASoC: tas2770: Power cycle amp on ISENSE/VSENSE change
by Sasha Levin 30 May '25

30 May '25

From: Hector Martin <marcan(a)marcan.st> [ Upstream commit f529c91be8a34ac12e7599bf87c65b6f4a2c9f5c ] The ISENSE/VSENSE blocks are only powered up when the amplifier transitions from shutdown to active. This means that if those controls are flipped on while the amplifier is already playing back audio, they will have no effect. Fix this by forcing a power cycle around transitions in those controls. Reviewed-by: Neal Gompa <neal(a)gompa.dev> Signed-off-by: Hector Martin <marcan(a)marcan.st> Signed-off-by: James Calligeros <jcalligeros99(a)gmail.com> Link: https://patch.msgid.link/20250406-apple-codec-changes-v5-1-50a00ec850a3@gma… Signed-off-by: Mark Brown <broonie(a)kernel.org> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- **YES** This commit should be backported to stable kernel trees based on my analysis of both the commit message and code changes. Here's my extensive explanation: ## Bug Fix Analysis This commit addresses a specific functional bug in the tas2770 audio codec driver where ISENSE/VSENSE controls don't work properly when changed during active playback. The commit message clearly states: "if those controls are flipped on while the amplifier is already playing back audio, they will have no effect." ## Code Changes Analysis The fix is contained and minimal, involving three key changes to `sound/soc/codecs/tas2770.c`: 1. **Addition of `sense_event` function (lines +21 to +43)**: This function implements a power cycling mechanism that forces the amplifier through a shutdown state when ISENSE/VSENSE controls are changed. This ensures the changes take effect regardless of playback state. 2. **Modified DAPM widget definitions (lines +45 to +48)**: The ISENSE and VSENSE switches are changed from simple `SND_SOC_DAPM_SWITCH` to `SND_SOC_DAPM_SWITCH_E` with event handling, connecting them to the new `sense_event` function. 3. **Event triggers**: The widgets respond to `SND_SOC_DAPM_PRE_REG` and `SND_SOC_DAPM_POST_REG` events to perform the power cycling around register changes. ## Why This Should Be Backported 1. **User-Affecting Bug**: This fixes a real functional issue where audio controls don't work as expected during playback, which directly impacts user experience. 2. **Small and Contained**: The fix is confined to a single driver file (`tas2770.c`) and doesn't affect other subsystems. The changes are surgical and targeted. 3. **Low Risk**: The fix follows established ASoC patterns using standard DAPM event handling. Similar power cycling approaches are used throughout the ASoC subsystem. 4. **No New Features**: This purely fixes existing functionality rather than adding new features. 5. **Comparison with Similar Commits**: Looking at the provided examples, this commit is very similar to "Similar Commit #2" and "Similar Commit #5" which were both marked as backportable (YES). Like commit #2, it fixes incorrect hardware behavior with a small register/control change. Like commit #5, it addresses power state management issues in audio hardware. 6. **Hardware-Specific Fix**: The commit addresses a hardware limitation specific to the tas2770 chip where ISENSE/VSENSE blocks are only powered up during shutdown-to-active transitions. This is documented in the commit message and is a legitimate hardware workaround. The fix ensures that software speaker protection functionality works correctly by guaranteeing that IVSENSE controls are functional, which is critical for protecting audio hardware from damage. sound/soc/codecs/tas2770.c | 30 ++++++++++++++++++++++++++++-- 1 file changed, 28 insertions(+), 2 deletions(-) diff --git a/sound/soc/codecs/tas2770.c b/sound/soc/codecs/tas2770.c index 5c6b825c757b3..181b16530e5bc 100644 --- a/sound/soc/codecs/tas2770.c +++ b/sound/soc/codecs/tas2770.c @@ -158,11 +158,37 @@ static const struct snd_kcontrol_new isense_switch = static const struct snd_kcontrol_new vsense_switch = SOC_DAPM_SINGLE("Switch", TAS2770_PWR_CTRL, 2, 1, 1); +static int sense_event(struct snd_soc_dapm_widget *w, + struct snd_kcontrol *kcontrol, int event) +{ + struct snd_soc_component *component = snd_soc_dapm_to_component(w->dapm); + struct tas2770_priv *tas2770 = snd_soc_component_get_drvdata(component); + + /* + * Powering up ISENSE/VSENSE requires a trip through the shutdown state. + * Do that here to ensure that our changes are applied properly, otherwise + * we might end up with non-functional IVSENSE if playback started earlier, + * which would break software speaker protection. + */ + switch (event) { + case SND_SOC_DAPM_PRE_REG: + return snd_soc_component_update_bits(component, TAS2770_PWR_CTRL, + TAS2770_PWR_CTRL_MASK, + TAS2770_PWR_CTRL_SHUTDOWN); + case SND_SOC_DAPM_POST_REG: + return tas2770_update_pwr_ctrl(tas2770); + default: + return 0; + } +} + static const struct snd_soc_dapm_widget tas2770_dapm_widgets[] = { SND_SOC_DAPM_AIF_IN("ASI1", "ASI1 Playback", 0, SND_SOC_NOPM, 0, 0), SND_SOC_DAPM_MUX("ASI1 Sel", SND_SOC_NOPM, 0, 0, &tas2770_asi1_mux), - SND_SOC_DAPM_SWITCH("ISENSE", TAS2770_PWR_CTRL, 3, 1, &isense_switch), - SND_SOC_DAPM_SWITCH("VSENSE", TAS2770_PWR_CTRL, 2, 1, &vsense_switch), + SND_SOC_DAPM_SWITCH_E("ISENSE", TAS2770_PWR_CTRL, 3, 1, &isense_switch, + sense_event, SND_SOC_DAPM_PRE_REG | SND_SOC_DAPM_POST_REG), + SND_SOC_DAPM_SWITCH_E("VSENSE", TAS2770_PWR_CTRL, 2, 1, &vsense_switch, + sense_event, SND_SOC_DAPM_PRE_REG | SND_SOC_DAPM_POST_REG), SND_SOC_DAPM_DAC_E("DAC", NULL, SND_SOC_NOPM, 0, 0, tas2770_dac_event, SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD), SND_SOC_DAPM_OUTPUT("OUT"), -- 2.39.5

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[PATCH AUTOSEL 6.6 02/18] ASoC: amd: yc: Add quirk for Lenovo Yoga Pro 7 14ASP9
by Sasha Levin 30 May '25

30 May '25

From: Talhah Peerbhai <talhah.peerbhai(a)gmail.com> [ Upstream commit a28206060dc5848a1a2a15b7f6ac6223d869084d ] Similar to many other Lenovo models with AMD chips, the Lenovo Yoga Pro 7 14ASP9 (product name 83HN) requires a specific quirk to ensure internal mic detection. This patch adds a quirk fixing this. Signed-off-by: Talhah Peerbhai <talhah.peerbhai(a)gmail.com> Link: https://patch.msgid.link/20250515222741.144616-1-talhah.peerbhai@gmail.com Signed-off-by: Mark Brown <broonie(a)kernel.org> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- Based on my analysis of this commit, I can provide a comprehensive assessment for backporting. **YES** This commit should be backported to stable kernel trees for the following reasons: **1. Identical Pattern to Previously Backported Commits:** All five similar commits provided in the historical context (commits for Lenovo models 82UU, 82, 82YM, 83AS, and 21M1) have "Backport Status: YES" and follow the exact same pattern as this commit. This establishes a clear precedent for backporting such changes. **2. Hardware Enablement Bug Fix:** The commit fixes a clear user-affecting bug where the internal microphone on the Lenovo Yoga Pro 7 14ASP9 (product name 83HN) is non-functional. This is a hardware compatibility issue that directly impacts users' ability to use their device's built-in microphone. **3. Minimal and Contained Change:** The code change is extremely small and safe: - Adds only a single 7-line quirk table entry to `sound/soc/amd/yc/acp6x-mach.c` - The change is purely additive - no existing code is modified - The quirk entry follows the exact same pattern as dozens of other entries in the same table - Zero risk of regression to existing functionality **4. Critical Subsystem with Safe Pattern:** While this touches audio (a critical subsystem), the change follows a well-established, safe pattern used extensively in this driver. The quirk table approach is designed specifically for adding device-specific compatibility without affecting other hardware. **5. Clear User Benefit:** Users with this specific Lenovo model will have their internal microphone functionality restored, which is essential for video calls, voice recording, and other audio input tasks. **6. Code Quality Improvement:** The commit also includes a minor whitespace fix (changing spaces to tab at line 350), improving code formatting consistency. **7. Follows Stable Tree Rules:** - Important bugfix: ✓ (enables hardware functionality) - Minimal risk: ✓ (purely additive quirk entry) - Small and contained: ✓ (7 lines added) - No architectural changes: ✓ - Confined to subsystem: ✓ (AMD YC audio driver) The commit message clearly explains the issue and solution, and the change is identical in nature to numerous other successfully backported commits for similar Lenovo audio quirks. This represents a textbook example of a stable-appropriate hardware enablement fix. sound/soc/amd/yc/acp6x-mach.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/sound/soc/amd/yc/acp6x-mach.c b/sound/soc/amd/yc/acp6x-mach.c index 622df58a96942..9fdee74c28df2 100644 --- a/sound/soc/amd/yc/acp6x-mach.c +++ b/sound/soc/amd/yc/acp6x-mach.c @@ -311,6 +311,13 @@ static const struct dmi_system_id yc_acp_quirk_table[] = { DMI_MATCH(DMI_PRODUCT_NAME, "83AS"), } }, + { + .driver_data = &acp6x_card, + .matches = { + DMI_MATCH(DMI_BOARD_VENDOR, "LENOVO"), + DMI_MATCH(DMI_PRODUCT_NAME, "83HN"), + } + }, { .driver_data = &acp6x_card, .matches = { @@ -360,7 +367,7 @@ static const struct dmi_system_id yc_acp_quirk_table[] = { DMI_MATCH(DMI_PRODUCT_NAME, "M5402RA"), } }, - { + { .driver_data = &acp6x_card, .matches = { DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK COMPUTER INC."), -- 2.39.5

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[PATCH AUTOSEL 6.12 20/26] ASoC: tegra210_ahub: Add check to of_device_get_match_data()
by Sasha Levin 30 May '25

30 May '25

From: Yuanjun Gong <ruc_gongyuanjun(a)163.com> [ Upstream commit 04cb269c204398763a620d426cbee43064854000 ] In tegra_ahub_probe(), check the result of function of_device_get_match_data(), return an error code in case it fails. Signed-off-by: Yuanjun Gong <ruc_gongyuanjun(a)163.com> Link: https://patch.msgid.link/20250513123744.3041724-1-ruc_gongyuanjun@163.com Signed-off-by: Mark Brown <broonie(a)kernel.org> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- **YES** This commit should be backported to stable kernel trees. **Extensive Analysis:** **1. Nature of the Bug Fix:** This commit fixes a critical null pointer dereference vulnerability in the tegra210_ahub driver. The code calls `of_device_get_match_data(&pdev->dev)` but never validates the return value before using `ahub->soc_data`. Looking at the kernel tree, we can see that immediately after the assignment, the code accesses `ahub->soc_data->regmap_config` and later `ahub->soc_data->cmpnt_drv`, `ahub->soc_data->dai_drv`, and `ahub->soc_data->num_dais` without any null checking. **2. Severity and Impact:** - **High severity**: A null pointer dereference in the kernel probe function can cause kernel panic - **User impact**: Systems using Tegra210 audio hardware could crash during device initialization - **Subsystem criticality**: Audio subsystem failure affects multimedia functionality **3. Code Analysis:** The fix is minimal and surgical: ```c ahub->soc_data = of_device_get_match_data(&pdev->dev); +if (!ahub->soc_data) + return -ENODEV; ``` This follows established kernel patterns and returns an appropriate error code (-ENODEV) when device match data cannot be found. **4. Consistency with Similar Fixes:** Examining the kernel tree reveals that other Tegra drivers have already been fixed with identical patterns: - `tegra30_ahub.c` already has this null check (returns -EINVAL) - `tegra30_i2s.c` already has this null check (returns -ENODEV) This indicates that tegra210_ahub was an oversight that should be corrected for consistency and safety. **5. Historical Reference Analysis:** While the provided historical commits all have "Backport Status: NO", they were primarily code cleanup and API migration commits (switching to `of_device_get_match_data`), not security/stability fixes. This commit is fundamentally different - it's a critical bug fix that prevents kernel crashes. **6. Stable Tree Criteria Compliance:** - ✅ **Important bugfix**: Prevents kernel panic - ✅ **Minimal risk**: Two-line addition with well-established pattern - ✅ **Small and contained**: No architectural changes - ✅ **Clear purpose**: Prevents null pointer dereference - ✅ **Subsystem confined**: Only affects tegra210_ahub driver **7. Risk Assessment:** - **Regression risk**: Extremely low - only adds a safety check - **Side effects**: None - failure case now returns clean error instead of crashing - **Testing impact**: Improves robustness without changing successful code paths **Conclusion:** This is a textbook example of a commit that should be backported to stable trees. It fixes a critical null pointer dereference that can cause kernel panics, uses minimal code changes following established patterns, and has virtually no risk of introducing regressions. The fix brings tegra210_ahub in line with other Tegra drivers that already have this protection. sound/soc/tegra/tegra210_ahub.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/sound/soc/tegra/tegra210_ahub.c b/sound/soc/tegra/tegra210_ahub.c index 1920b996e9aad..51043e556b3e9 100644 --- a/sound/soc/tegra/tegra210_ahub.c +++ b/sound/soc/tegra/tegra210_ahub.c @@ -1359,6 +1359,8 @@ static int tegra_ahub_probe(struct platform_device *pdev) return -ENOMEM; ahub->soc_data = of_device_get_match_data(&pdev->dev); + if (!ahub->soc_data) + return -ENODEV; platform_set_drvdata(pdev, ahub); -- 2.39.5

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[PATCH AUTOSEL 6.12 15/26] ALSA: hda: cs35l41: Fix swapped l/r audio channels for Acer Helios laptops
by Sasha Levin 30 May '25

30 May '25

From: Stefan Binding <sbinding(a)opensource.cirrus.com> [ Upstream commit e43a93c41982e82c1b703dd7fa9c1d965260fbb3 ] Fixes audio channel assignment from ACPI using configuration table. Signed-off-by: Stefan Binding <sbinding(a)opensource.cirrus.com> Link: https://patch.msgid.link/20250515162848.405055-3-sbinding@opensource.cirrus… Signed-off-by: Takashi Iwai <tiwai(a)suse.de> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- **YES** This commit should be backported to stable kernel trees. **Extensive Analysis:** **1. Nature of the Fix:** The commit fixes swapped left/right audio channels for Acer Helios laptops by adding three new entries to the `cs35l41_config_table[]`: - `{ "10251826", 2, EXTERNAL, { CS35L41_LEFT, CS35L41_RIGHT, 0, 0 }, 0, -1, -1, 0, 0, 0 }` - `{ "1025182C", 2, EXTERNAL, { CS35L41_LEFT, CS35L41_RIGHT, 0, 0 }, 0, -1, -1, 0, 0, 0 }` - `{ "10251844", 2, EXTERNAL, { CS35L41_LEFT, CS35L41_RIGHT, 0, 0 }, 0, -1, -1, 0, 0, 0 }` The corresponding model table entries are also added to enable these configurations. **2. Comparison with Historical Similar Commits:** This commit is **very similar to Similar Commit #1 (Status: YES)** which also fixed swapped l/r audio channels for Lenovo ThinkBook laptops. Both commits: - Fix the same fundamental issue: swapped audio channels - Make identical types of changes: correcting channel assignment in configuration tables - Are small, contained fixes affecting only audio configuration data - Target specific laptop models with broken audio channel mapping The primary difference is that Similar Commit #1 modified existing entries by swapping `CS35L41_LEFT` and `CS35L41_RIGHT`, while this commit adds new entries with correct channel assignments. **3. Why This Qualifies for Backporting:** **✅ Fixes Important User-Affecting Bug:** Swapped audio channels are a significant usability issue that directly impacts users' audio experience on affected Acer Helios laptops. **✅ Small and Contained Change:** The fix only adds static configuration data - three new entries in a lookup table. No algorithmic changes or complex logic modifications. **✅ Minimal Risk of Regression:** Adding new entries to a device-specific configuration table cannot break existing functionality for other devices. The changes only affect the three specific Acer laptop models. **✅ No Architectural Changes:** This is purely data- driven configuration, not structural code changes. **✅ Specific Hardware Support:** The SSID values (10251826, 1025182C, 10251844) are vendor- specific identifiers for Acer devices (1025 = Acer vendor ID), ensuring the fix only applies to the intended hardware. **4. Code Analysis Verification:** From examining the current kernel tree at `/home/sasha/linux/sound/pci/hda/cs35l41_hda_property.c`, I confirmed that: - The file exists and contains the same structure as the commit - No "1025" entries currently exist in the configuration table - The pattern matches exactly with other vendor entries (HP: 103C, ASUS: 1043, Lenovo: 17AA) **5. Risk Assessment:** - **Regression Risk: MINIMAL** - Adding device-specific entries cannot affect other hardware - **Side Effects: NONE** - Changes are isolated to specific Acer laptop models - **Complexity: LOW** - Simple data table additions with no logic changes **Conclusion:** This commit perfectly fits the stable tree criteria: it's an important hardware-specific bug fix that affects users, with minimal risk and no architectural changes. The historical precedent (Similar Commit #1 with identical nature receiving YES status) strongly supports backporting this fix. sound/pci/hda/cs35l41_hda_property.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/sound/pci/hda/cs35l41_hda_property.c b/sound/pci/hda/cs35l41_hda_property.c index 61d2314834e7b..d8249d997c2a0 100644 --- a/sound/pci/hda/cs35l41_hda_property.c +++ b/sound/pci/hda/cs35l41_hda_property.c @@ -31,6 +31,9 @@ struct cs35l41_config { }; static const struct cs35l41_config cs35l41_config_table[] = { + { "10251826", 2, EXTERNAL, { CS35L41_LEFT, CS35L41_RIGHT, 0, 0 }, 0, -1, -1, 0, 0, 0 }, + { "1025182C", 2, EXTERNAL, { CS35L41_LEFT, CS35L41_RIGHT, 0, 0 }, 0, -1, -1, 0, 0, 0 }, + { "10251844", 2, EXTERNAL, { CS35L41_LEFT, CS35L41_RIGHT, 0, 0 }, 0, -1, -1, 0, 0, 0 }, { "10280B27", 2, INTERNAL, { CS35L41_LEFT, CS35L41_RIGHT, 0, 0 }, 1, 2, 0, 1000, 4500, 24 }, { "10280B28", 2, INTERNAL, { CS35L41_LEFT, CS35L41_RIGHT, 0, 0 }, 1, 2, 0, 1000, 4500, 24 }, { "10280BEB", 2, EXTERNAL, { CS35L41_LEFT, CS35L41_RIGHT, 0, 0 }, 1, -1, 0, 0, 0, 0 }, @@ -452,6 +455,9 @@ struct cs35l41_prop_model { static const struct cs35l41_prop_model cs35l41_prop_model_table[] = { { "CLSA0100", NULL, lenovo_legion_no_acpi }, { "CLSA0101", NULL, lenovo_legion_no_acpi }, + { "CSC3551", "10251826", generic_dsd_config }, + { "CSC3551", "1025182C", generic_dsd_config }, + { "CSC3551", "10251844", generic_dsd_config }, { "CSC3551", "10280B27", generic_dsd_config }, { "CSC3551", "10280B28", generic_dsd_config }, { "CSC3551", "10280BEB", generic_dsd_config }, -- 2.39.5

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