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[PATCH stable 6.12.y] cpufreq: intel_pstate: Check IDA only before MSR_IA32_PERF_CTL writes

by Richa Bharti

From: Richa Bharti <richa.bharti(a)siemens.com> [ Upstream commit 4b747cc628d8f500d56cf1338280eacc66362ff3 ] Commit ac4e04d9e378 ("cpufreq: intel_pstate: Unchecked MSR aceess in legacy mode") introduced a check for feature X86_FEATURE_IDA to verify turbo mode support. Although this is the correct way to check for turbo mode support, it causes issues on some platforms that disable turbo during OS boot, but enable it later [1]. Before adding this feature check, users were able to get turbo mode frequencies by writing 0 to /sys/devices/system/cpu/intel_pstate/no_turbo post-boot. To restore the old behavior on the affected systems while still addressing the unchecked MSR issue on some Skylake-X systems, check X86_FEATURE_IDA only immediately before updates of MSR_IA32_PERF_CTL that may involve setting the Turbo Engage Bit (bit 32). Fixes: ac4e04d9e378 ("cpufreq: intel_pstate: Unchecked MSR aceess in legacy mode") Reported-by: Aaron Rainbolt <arainbolt(a)kfocus.org> Closes: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2122531 [1] Tested-by: Aaron Rainbolt <arainbolt(a)kfocus.org> Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada(a)linux.intel.com> [ rjw: Subject adjustment, changelog edits ] Link: https://patch.msgid.link/20251111010840.141490-1-srinivas.pandruvada@linux.… Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki(a)intel.com> [ richa: Backport to 6.12.y with context adjustments ] Signed-off-by: Richa Bharti <richa.bharti(a)siemens.com> --- drivers/cpufreq/intel_pstate.c | 9 ++++----- 1 file changed, 4 insertions(+), 5 deletions(-) diff --git a/drivers/cpufreq/intel_pstate.c b/drivers/cpufreq/intel_pstate.c index d0f4f7c2ae4d..9d8cb44c26c7 100644 --- a/drivers/cpufreq/intel_pstate.c +++ b/drivers/cpufreq/intel_pstate.c @@ -600,9 +600,6 @@ static bool turbo_is_disabled(void) { u64 misc_en; - if (!cpu_feature_enabled(X86_FEATURE_IDA)) - return true; - rdmsrl(MSR_IA32_MISC_ENABLE, misc_en); return !!(misc_en & MSR_IA32_MISC_ENABLE_TURBO_DISABLE); @@ -2018,7 +2015,8 @@ static u64 atom_get_val(struct cpudata *cpudata, int pstate) u32 vid; val = (u64)pstate << 8; - if (READ_ONCE(global.no_turbo) && !READ_ONCE(global.turbo_disabled)) + if (READ_ONCE(global.no_turbo) && !READ_ONCE(global.turbo_disabled) && + cpu_feature_enabled(X86_FEATURE_IDA)) val |= (u64)1 << 32; vid_fp = cpudata->vid.min + mul_fp( @@ -2183,7 +2181,8 @@ static u64 core_get_val(struct cpudata *cpudata, int pstate) u64 val; val = (u64)pstate << 8; - if (READ_ONCE(global.no_turbo) && !READ_ONCE(global.turbo_disabled)) + if (READ_ONCE(global.no_turbo) && !READ_ONCE(global.turbo_disabled) && + cpu_feature_enabled(X86_FEATURE_IDA)) val |= (u64)1 << 32; return val; -- 2.39.5

1 day, 23 hours

[PATCH RESEND] clk: mediatek: set CLK_IGNORE_UNUSED to clock mt8188 adsp audio26m

by Macpaul Lin

Set CLK_IGNORE_UNUSED flag to clock adsp audio26m to prevent disabling this clock during early boot, as turning it off causes other modules to fail probing and leads to boot failures in ARM SystemReady test cases and the EFI boot process (on Linux Distributions, for example, debian, openSuse, etc.). Without this flag, disabling unused clocks cannot complete properly after adsp_audio26m is turned off. Fixes: 0d2f2cefba64 ("clk: mediatek: Add MT8188 adsp clock support") Cc: Stable(a)vger.kernel.org Signed-off-by: Macpaul Lin <macpaul.lin(a)mediatek.com> --- drivers/clk/mediatek/clk-mt8188-adsp_audio26m.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/clk/mediatek/clk-mt8188-adsp_audio26m.c b/drivers/clk/mediatek/clk-mt8188-adsp_audio26m.c index dcde2187d24a..b9fe66ef4f2e 100644 --- a/drivers/clk/mediatek/clk-mt8188-adsp_audio26m.c +++ b/drivers/clk/mediatek/clk-mt8188-adsp_audio26m.c @@ -20,8 +20,8 @@ static const struct mtk_gate_regs adsp_audio26m_cg_regs = { }; #define GATE_ADSP_FLAGS(_id, _name, _parent, _shift) \ - GATE_MTK(_id, _name, _parent, &adsp_audio26m_cg_regs, _shift, \ - &mtk_clk_gate_ops_no_setclr) + GATE_MTK_FLAGS(_id, _name, _parent, &adsp_audio26m_cg_regs, _shift, \ + &mtk_clk_gate_ops_no_setclr, CLK_IGNORE_UNUSED) static const struct mtk_gate adsp_audio26m_clks[] = { GATE_ADSP_FLAGS(CLK_AUDIODSP_AUDIO26M, "audiodsp_audio26m", "clk26m", 3), -- 2.45.2

1 day, 23 hours

[PATCH AUTOSEL 6.18-6.17] ALSA: hda/realtek: Add support for ASUS UM3406GA

by Sasha Levin

From: Stefan Binding <sbinding(a)opensource.cirrus.com> [ Upstream commit 826c0b1ed09e5335abcae07292440ce72346e578 ] Laptops use 2 CS35L41 Amps with HDA, using External boost, with I2C Signed-off-by: Stefan Binding <sbinding(a)opensource.cirrus.com> Link: https://patch.msgid.link/20251205150614.49590-3-sbinding@opensource.cirrus.… Signed-off-by: Takashi Iwai <tiwai(a)suse.de> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- LLM Generated explanations, may be completely bogus: ## Commit Analysis: ALSA: hda/realtek: Add support for ASUS UM3406GA ### 1. COMMIT MESSAGE ANALYSIS The commit message is straightforward: it adds support for a specific ASUS laptop model (UM3406GA) that uses 2 CS35L41 amplifiers connected via I2C with external boost. The message describes the hardware configuration, which is standard for such device ID additions. No Fixes: or Cc: stable tags are present, but as noted, this is expected for commits requiring manual review. ### 2. CODE CHANGE ANALYSIS The entire change is a single line addition: ```c SND_PCI_QUIRK(0x1043, 0x1584, "ASUS UM3406GA ", ALC287_FIXUP_CS35L41_I2C_2), ``` This adds: - Vendor ID: 0x1043 (ASUS) - Device/Subsystem ID: 0x1584 (ASUS UM3406GA) - Fixup: `ALC287_FIXUP_CS35L41_I2C_2` (an **existing** fixup already used by many other ASUS models) Looking at the surrounding code, multiple other ASUS laptops use the same fixup: - ASUS PM3406CKA (0x1454) - ASUS G513PI/PU/PV (0x14e3) - ASUS G733PY/PZ/PZV/PYV (0x1503) - ASUS GV302XA/XJ/XQ/XU/XV/XI (0x1533) - ASUS UM3402YAR (0x1683) ### 3. CLASSIFICATION This is a **NEW DEVICE ID** addition - explicitly listed as an exception that IS appropriate for stable backporting. The driver infrastructure and fixup code already exist; this merely adds an ID to enable the existing fix for new hardware. ### 4. SCOPE AND RISK ASSESSMENT - **Lines changed**: 1 line - **Files touched**: 1 file - **Complexity**: Zero - table entry addition only - **Risk**: Extremely low - this cannot affect any other hardware - **No new code paths**: Uses pre-existing `ALC287_FIXUP_CS35L41_I2C_2` fixup ### 5. USER IMPACT - **Who is affected**: Owners of ASUS UM3406GA laptops - **Problem without fix**: Audio (specifically the CS35L41 amplifiers) won't function properly - **Severity**: Non-working audio is a significant user-facing issue for laptop users ### 6. STABILITY INDICATORS - Signed-off by Takashi Iwai (ALSA maintainer at SUSE) - Standard quirk addition pattern used extensively throughout this file - Follows exact same format as dozens of other ASUS quirk entries ### 7. DEPENDENCY CHECK - The fixup `ALC287_FIXUP_CS35L41_I2C_2` has been in the kernel for some time, supporting multiple other ASUS models - No other commits are required for this to work - This should apply cleanly to stable trees that have the CS35L41 support infrastructure ### CONCLUSION This commit is a textbook example of what should be backported to stable trees: 1. **Falls under explicit exception**: Adding device IDs to existing drivers is explicitly allowed 2. **Minimal change**: Single line, single table entry 3. **Zero regression risk**: Cannot affect any hardware except the targeted laptop 4. **Uses existing infrastructure**: The fixup is already well-tested on similar ASUS models 5. **Fixes real user problem**: Enables audio on a production laptop 6. **Obviously correct**: Identical pattern to surrounding entries The risk-benefit analysis strongly favors backporting: virtually zero risk with clear user benefit (working audio on a specific laptop model). **YES** sound/hda/codecs/realtek/alc269.c | 1 + 1 file changed, 1 insertion(+) diff --git a/sound/hda/codecs/realtek/alc269.c b/sound/hda/codecs/realtek/alc269.c index b45fcc9a3785e..008bf9d5148e1 100644 --- a/sound/hda/codecs/realtek/alc269.c +++ b/sound/hda/codecs/realtek/alc269.c @@ -6752,6 +6752,7 @@ static const struct hda_quirk alc269_fixup_tbl[] = { SND_PCI_QUIRK(0x1043, 0x1517, "Asus Zenbook UX31A", ALC269VB_FIXUP_ASUS_ZENBOOK_UX31A), SND_PCI_QUIRK(0x1043, 0x1533, "ASUS GV302XA/XJ/XQ/XU/XV/XI", ALC287_FIXUP_CS35L41_I2C_2), SND_PCI_QUIRK(0x1043, 0x1573, "ASUS GZ301VV/VQ/VU/VJ/VA/VC/VE/VVC/VQC/VUC/VJC/VEC/VCC", ALC285_FIXUP_ASUS_HEADSET_MIC), + SND_PCI_QUIRK(0x1043, 0x1584, "ASUS UM3406GA ", ALC287_FIXUP_CS35L41_I2C_2), SND_PCI_QUIRK(0x1043, 0x1652, "ASUS ROG Zephyrus Do 15 SE", ALC289_FIXUP_ASUS_ZEPHYRUS_DUAL_SPK), SND_PCI_QUIRK(0x1043, 0x1662, "ASUS GV301QH", ALC294_FIXUP_ASUS_DUAL_SPK), SND_PCI_QUIRK(0x1043, 0x1663, "ASUS GU603ZI/ZJ/ZQ/ZU/ZV", ALC285_FIXUP_ASUS_HEADSET_MIC), -- 2.51.0

2 days

[PATCH] drm/i915/dmc: fix an unlikely NULL pointer deference at probe

by Jani Nikula

intel_dmc_update_dc6_allowed_count() oopses when DMC hasn't been initialized, and dmc is thus NULL. That would be the case when the call path is intel_power_domains_init_hw() -> {skl,bxt,icl}_display_core_init() -> gen9_set_dc_state() -> intel_dmc_update_dc6_allowed_count(), as intel_power_domains_init_hw() is called *before* intel_dmc_init(). However, gen9_set_dc_state() calls intel_dmc_update_dc6_allowed_count() conditionally, depending on the current and target DC states. At probe, the target is disabled, but if DC6 is enabled, the function is called, and an oops follows. Apparently it's quite unlikely that DC6 is enabled at probe, as we haven't seen this failure mode before. Add NULL checks and switch the dmc->display references to just display. Fixes: 88c1f9a4d36d ("drm/i915/dmc: Create debugfs entry for dc6 counter") Cc: Mohammed Thasleem <mohammed.thasleem(a)intel.com> Cc: Imre Deak <imre.deak(a)intel.com> Cc: <stable(a)vger.kernel.org> # v6.16+ Signed-off-by: Jani Nikula <jani.nikula(a)intel.com> --- Rare case, but this may also throw off the rc6 counting in debugfs when it does happen. --- drivers/gpu/drm/i915/display/intel_dmc.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/i915/display/intel_dmc.c b/drivers/gpu/drm/i915/display/intel_dmc.c index 2fb6fec6dc99..169bbbc91f6d 100644 --- a/drivers/gpu/drm/i915/display/intel_dmc.c +++ b/drivers/gpu/drm/i915/display/intel_dmc.c @@ -1570,10 +1570,10 @@ void intel_dmc_update_dc6_allowed_count(struct intel_display *display, struct intel_dmc *dmc = display_to_dmc(display); u32 dc5_cur_count; - if (DISPLAY_VER(dmc->display) < 14) + if (!dmc || DISPLAY_VER(display) < 14) return; - dc5_cur_count = intel_de_read(dmc->display, DG1_DMC_DEBUG_DC5_COUNT); + dc5_cur_count = intel_de_read(display, DG1_DMC_DEBUG_DC5_COUNT); if (!start_tracking) dmc->dc6_allowed.count += dc5_cur_count - dmc->dc6_allowed.dc5_start; @@ -1587,7 +1587,7 @@ static bool intel_dmc_get_dc6_allowed_count(struct intel_display *display, u32 * struct intel_dmc *dmc = display_to_dmc(display); bool dc6_enabled; - if (DISPLAY_VER(display) < 14) + if (!dmc || DISPLAY_VER(display) < 14) return false; mutex_lock(&power_domains->lock); -- 2.47.3

2 days

[PATCH] clk: mediatek: Drop __initconst from gates

by Sjoerd Simons

Since commit 8ceff24a754a ("clk: mediatek: clk-gate: Refactor mtk_clk_register_gate to use mtk_gate struct") the mtk_gate structs are no longer just used for initialization/registration, but also at runtime. So drop __initconst annotations. Fixes: 8ceff24a754a ("clk: mediatek: clk-gate: Refactor mtk_clk_register_gate to use mtk_gate struct") Signed-off-by: Sjoerd Simons <sjoerd(a)collabora.com> --- drivers/clk/mediatek/clk-mt7981-eth.c | 6 +++--- drivers/clk/mediatek/clk-mt8516.c | 2 +- 2 files changed, 4 insertions(+), 4 deletions(-) diff --git a/drivers/clk/mediatek/clk-mt7981-eth.c b/drivers/clk/mediatek/clk-mt7981-eth.c index 906aec9ddff5..0655ebb6c561 100644 --- a/drivers/clk/mediatek/clk-mt7981-eth.c +++ b/drivers/clk/mediatek/clk-mt7981-eth.c @@ -31,7 +31,7 @@ static const struct mtk_gate_regs sgmii0_cg_regs = { .ops = &mtk_clk_gate_ops_no_setclr_inv, \ } -static const struct mtk_gate sgmii0_clks[] __initconst = { +static const struct mtk_gate sgmii0_clks[] = { GATE_SGMII0(CLK_SGM0_TX_EN, "sgm0_tx_en", "usb_tx250m", 2), GATE_SGMII0(CLK_SGM0_RX_EN, "sgm0_rx_en", "usb_eq_rx250m", 3), GATE_SGMII0(CLK_SGM0_CK0_EN, "sgm0_ck0_en", "usb_ln0", 4), @@ -53,7 +53,7 @@ static const struct mtk_gate_regs sgmii1_cg_regs = { .ops = &mtk_clk_gate_ops_no_setclr_inv, \ } -static const struct mtk_gate sgmii1_clks[] __initconst = { +static const struct mtk_gate sgmii1_clks[] = { GATE_SGMII1(CLK_SGM1_TX_EN, "sgm1_tx_en", "usb_tx250m", 2), GATE_SGMII1(CLK_SGM1_RX_EN, "sgm1_rx_en", "usb_eq_rx250m", 3), GATE_SGMII1(CLK_SGM1_CK1_EN, "sgm1_ck1_en", "usb_ln0", 4), @@ -75,7 +75,7 @@ static const struct mtk_gate_regs eth_cg_regs = { .ops = &mtk_clk_gate_ops_no_setclr_inv, \ } -static const struct mtk_gate eth_clks[] __initconst = { +static const struct mtk_gate eth_clks[] = { GATE_ETH(CLK_ETH_FE_EN, "eth_fe_en", "netsys_2x", 6), GATE_ETH(CLK_ETH_GP2_EN, "eth_gp2_en", "sgm_325m", 7), GATE_ETH(CLK_ETH_GP1_EN, "eth_gp1_en", "sgm_325m", 8), diff --git a/drivers/clk/mediatek/clk-mt8516.c b/drivers/clk/mediatek/clk-mt8516.c index 21eb052b0a53..342a59019fea 100644 --- a/drivers/clk/mediatek/clk-mt8516.c +++ b/drivers/clk/mediatek/clk-mt8516.c @@ -544,7 +544,7 @@ static const struct mtk_gate_regs top5_cg_regs = { #define GATE_TOP5(_id, _name, _parent, _shift) \ GATE_MTK(_id, _name, _parent, &top5_cg_regs, _shift, &mtk_clk_gate_ops_setclr) -static const struct mtk_gate top_clks[] __initconst = { +static const struct mtk_gate top_clks[] = { /* TOP1 */ GATE_TOP1(CLK_TOP_THEM, "them", "ahb_infra_sel", 1), GATE_TOP1(CLK_TOP_APDMA, "apdma", "ahb_infra_sel", 2), --- base-commit: b927546677c876e26eba308550207c2ddf812a43 change-id: 20251223-mtk-gate-a98133ab80c9 Best regards, -- Sjoerd Simons <sjoerd(a)collabora.com>

2 days

FAILED: patch "[PATCH] drm/amdgpu: Forward VMID reservation errors" failed to apply to 6.12-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 6.12-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.12.y git checkout FETCH_HEAD git cherry-pick -x 8defb4f081a5feccc3ea8372d0c7af3522124e1f # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2026010549-ensnare-embassy-d32e@gregkh' --subject-prefix 'PATCH 6.12.y' HEAD^.. Possible dependencies: thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From 8defb4f081a5feccc3ea8372d0c7af3522124e1f Mon Sep 17 00:00:00 2001 From: Natalie Vock <natalie.vock(a)gmx.de> Date: Mon, 1 Dec 2025 12:52:38 -0500 Subject: [PATCH] drm/amdgpu: Forward VMID reservation errors MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Otherwise userspace may be fooled into believing it has a reserved VMID when in reality it doesn't, ultimately leading to GPU hangs when SPM is used. Fixes: 80e709ee6ecc ("drm/amdgpu: add option params to enforce process isolation between graphics and compute") Cc: stable(a)vger.kernel.org Reviewed-by: Christian König <christian.koenig(a)amd.com> Signed-off-by: Natalie Vock <natalie.vock(a)gmx.de> Signed-off-by: Alex Deucher <alexander.deucher(a)amd.com> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c index d7cd84d33018..a67285118c37 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c @@ -2916,8 +2916,7 @@ int amdgpu_vm_ioctl(struct drm_device *dev, void *data, struct drm_file *filp) switch (args->in.op) { case AMDGPU_VM_OP_RESERVE_VMID: /* We only have requirement to reserve vmid from gfxhub */ - amdgpu_vmid_alloc_reserved(adev, vm, AMDGPU_GFXHUB(0)); - break; + return amdgpu_vmid_alloc_reserved(adev, vm, AMDGPU_GFXHUB(0)); case AMDGPU_VM_OP_UNRESERVE_VMID: amdgpu_vmid_free_reserved(adev, vm, AMDGPU_GFXHUB(0)); break;

2 days

FAILED: patch "[PATCH] wifi: mac80211: Discard Beacon frames to non-broadcast" failed to apply to 5.15-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 5.15-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.15.y git checkout FETCH_HEAD git cherry-pick -x 193d18f60588e95d62e0f82b6a53893e5f2f19f8 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2026010523-fifty-navigator-ec96@gregkh' --subject-prefix 'PATCH 5.15.y' HEAD^.. Possible dependencies: thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From 193d18f60588e95d62e0f82b6a53893e5f2f19f8 Mon Sep 17 00:00:00 2001 From: Jouni Malinen <jouni.malinen(a)oss.qualcomm.com> Date: Mon, 15 Dec 2025 17:11:34 +0200 Subject: [PATCH] wifi: mac80211: Discard Beacon frames to non-broadcast address Beacon frames are required to be sent to the broadcast address, see IEEE Std 802.11-2020, 11.1.3.1 ("The Address 1 field of the Beacon .. frame shall be set to the broadcast address"). A unicast Beacon frame might be used as a targeted attack to get one of the associated STAs to do something (e.g., using CSA to move it to another channel). As such, it is better have strict filtering for this on the received side and discard all Beacon frames that are sent to an unexpected address. This is even more important for cases where beacon protection is used. The current implementation in mac80211 is correctly discarding unicast Beacon frames if the Protected Frame bit in the Frame Control field is set to 0. However, if that bit is set to 1, the logic used for checking for configured BIGTK(s) does not actually work. If the driver does not have logic for dropping unicast Beacon frames with Protected Frame bit 1, these frames would be accepted in mac80211 processing as valid Beacon frames even though they are not protected. This would allow beacon protection to be bypassed. While the logic for checking beacon protection could be extended to cover this corner case, a more generic check for discard all Beacon frames based on A1=unicast address covers this without needing additional changes. Address all these issues by dropping received Beacon frames if they are sent to a non-broadcast address. Cc: stable(a)vger.kernel.org Fixes: af2d14b01c32 ("mac80211: Beacon protection using the new BIGTK (STA)") Signed-off-by: Jouni Malinen <jouni.malinen(a)oss.qualcomm.com> Link: https://patch.msgid.link/20251215151134.104501-1-jouni.malinen@oss.qualcomm… Signed-off-by: Johannes Berg <johannes.berg(a)intel.com> diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c index 6a1899512d07..e0ccd9749853 100644 --- a/net/mac80211/rx.c +++ b/net/mac80211/rx.c @@ -3511,6 +3511,11 @@ ieee80211_rx_h_mgmt_check(struct ieee80211_rx_data *rx) rx->skb->len < IEEE80211_MIN_ACTION_SIZE) return RX_DROP_U_RUNT_ACTION; + /* Drop non-broadcast Beacon frames */ + if (ieee80211_is_beacon(mgmt->frame_control) && + !is_broadcast_ether_addr(mgmt->da)) + return RX_DROP; + if (rx->sdata->vif.type == NL80211_IFTYPE_AP && ieee80211_is_beacon(mgmt->frame_control) && !(rx->flags & IEEE80211_RX_BEACON_REPORTED)) {

2 days

[PATCH] hrtimer: Fix softirq base check in update_needs_ipi()

by Thomas Weißschuh

The 'clockid' field is not the correct way to check for a softirq base. Fix the check to correctly compare the base type instead of the clockid. Fixes: 1e7f7fbcd40c ("hrtimer: Avoid more SMP function calls in clock_was_set()") Cc: stable(a)vger.kernel.org Signed-off-by: Thomas Weißschuh <thomas.weissschuh(a)linutronix.de> --- kernel/time/hrtimer.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kernel/time/hrtimer.c b/kernel/time/hrtimer.c index f8ea8c8fc895..d0c59fc0beb4 100644 --- a/kernel/time/hrtimer.c +++ b/kernel/time/hrtimer.c @@ -913,7 +913,7 @@ static bool update_needs_ipi(struct hrtimer_cpu_base *cpu_base, return true; /* Extra check for softirq clock bases */ - if (base->clockid < HRTIMER_BASE_MONOTONIC_SOFT) + if (base->index < HRTIMER_BASE_MONOTONIC_SOFT) continue; if (cpu_base->softirq_activated) continue; --- base-commit: 8f0b4cce4481fb22653697cced8d0d04027cb1e8 change-id: 20260105-hrtimer-clock-base-check-b91d586b70f7 Best regards, -- Thomas Weißschuh <thomas.weissschuh(a)linutronix.de>

2 days

[PATCH 6.6.y] drm/amd/display: Fix null pointer deref in dcn20_resource.c

by David Nyström

From: Aurabindo Pillai <aurabindo.pillai(a)amd.com> [ Upstream commit ecbf60782662f0a388493685b85a645a0ba1613c ] Fixes a hang thats triggered when MPV is run on a DCN401 dGPU: mpv --hwdec=vaapi --vo=gpu --hwdec-codecs=all and then enabling fullscreen playback (double click on the video) The following calltrace will be seen: [ 181.843989] BUG: kernel NULL pointer dereference, address: 0000000000000000 [ 181.843997] #PF: supervisor instruction fetch in kernel mode [ 181.844003] #PF: error_code(0x0010) - not-present page [ 181.844009] PGD 0 P4D 0 [ 181.844020] Oops: 0010 [#1] PREEMPT SMP NOPTI [ 181.844028] CPU: 6 PID: 1892 Comm: gnome-shell Tainted: G W OE 6.5.0-41-generic #41~22.04.2-Ubuntu [ 181.844038] Hardware name: System manufacturer System Product Name/CROSSHAIR VI HERO, BIOS 6302 10/23/2018 [ 181.844044] RIP: 0010:0x0 [ 181.844079] Code: Unable to access opcode bytes at 0xffffffffffffffd6. [ 181.844084] RSP: 0018:ffffb593c2b8f7b0 EFLAGS: 00010246 [ 181.844093] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000004 [ 181.844099] RDX: ffffb593c2b8f804 RSI: ffffb593c2b8f7e0 RDI: ffff9e3c8e758400 [ 181.844105] RBP: ffffb593c2b8f7b8 R08: ffffb593c2b8f9c8 R09: ffffb593c2b8f96c [ 181.844110] R10: 0000000000000000 R11: 0000000000000000 R12: ffffb593c2b8f9c8 [ 181.844115] R13: 0000000000000001 R14: ffff9e3c88000000 R15: 0000000000000005 [ 181.844121] FS: 00007c6e323bb5c0(0000) GS:ffff9e3f85f80000(0000) knlGS:0000000000000000 [ 181.844128] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 181.844134] CR2: ffffffffffffffd6 CR3: 0000000140fbe000 CR4: 00000000003506e0 [ 181.844141] Call Trace: [ 181.844146] <TASK> [ 181.844153] ? show_regs+0x6d/0x80 [ 181.844167] ? __die+0x24/0x80 [ 181.844179] ? page_fault_oops+0x99/0x1b0 [ 181.844192] ? do_user_addr_fault+0x31d/0x6b0 [ 181.844204] ? exc_page_fault+0x83/0x1b0 [ 181.844216] ? asm_exc_page_fault+0x27/0x30 [ 181.844237] dcn20_get_dcc_compression_cap+0x23/0x30 [amdgpu] [ 181.845115] amdgpu_dm_plane_validate_dcc.constprop.0+0xe5/0x180 [amdgpu] [ 181.845985] amdgpu_dm_plane_fill_plane_buffer_attributes+0x300/0x580 [amdgpu] [ 181.846848] fill_dc_plane_info_and_addr+0x258/0x350 [amdgpu] [ 181.847734] fill_dc_plane_attributes+0x162/0x350 [amdgpu] [ 181.848748] dm_update_plane_state.constprop.0+0x4e3/0x6b0 [amdgpu] [ 181.849791] ? dm_update_plane_state.constprop.0+0x4e3/0x6b0 [amdgpu] [ 181.850840] amdgpu_dm_atomic_check+0xdfe/0x1760 [amdgpu] Signed-off-by: Aurabindo Pillai <aurabindo.pillai(a)amd.com> Reviewed-by: Rodrigo Siqueira <Rodrigo.Siqueira(a)amd.com> Signed-off-by: Alex Deucher <alexander.deucher(a)amd.com> Signed-off-by: David Nyström <david.nystrom(a)est.tech> --- drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) diff --git a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c index 294609557b73..e0daa4e051ac 100644 --- a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c +++ b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c @@ -2179,10 +2179,11 @@ bool dcn20_get_dcc_compression_cap(const struct dc *dc, const struct dc_dcc_surface_param *input, struct dc_surface_dcc_cap *output) { - return dc->res_pool->hubbub->funcs->get_dcc_compression_cap( - dc->res_pool->hubbub, - input, - output); + if (dc->res_pool->hubbub->funcs->get_dcc_compression_cap) + return dc->res_pool->hubbub->funcs->get_dcc_compression_cap( + dc->res_pool->hubbub, input, output); + + return false; } static void dcn20_destroy_resource_pool(struct resource_pool **pool) --- base-commit: 5fa4793a2d2d70ad08b85387b41020f1fcc2d19e change-id: 20260107-null_pointer-0bdcbe3461a9 Best regards, -- David Nyström <david.nystrom(a)est.tech>

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