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2025-12-10Revert "drm/amd/display: Fix pbn to kbps Conversion"Mario Limonciello
Deeply daisy chained DP/MST displays are no longer able to light up. This reverts commit e0dec00f3d05 ("drm/amd/display: Fix pbn to kbps Conversion") Cc: Jerry Zuo <jerry.zuo@amd.com> Reported-by: nat@nullable.se Closes: https://gitlab.freedesktop.org/drm/amd/-/issues/4756 Signed-off-by: Mario Limonciello <mario.limonciello@amd.com> Acked-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com> (cherry picked from commit e1c94109c76e8a77a21531bd53f6c63356c81158) Cc: stable@vger.kernel.org # 6.17+
2025-12-10drm/amd: Fix unbind/rebind for VCN 4.0.5Mario Limonciello (AMD)
Unbinding amdgpu has no problems, but binding it again leads to an error of sysfs file already existing. This is because it wasn't actually cleaned up on unbind. Add the missing cleanup step. Fixes: 547aad32edac ("drm/amdgpu: add VCN4 ip block support") Signed-off-by: Mario Limonciello (AMD) <superm1@kernel.org> Reviewed-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com> (cherry picked from commit d717e62e9b6ccff0e3cec78a58dfbd00858448b3) Cc: stable@vger.kernel.org
2025-12-11drm: pl111: replace dev_* print functions with drm_* variantsEslam Khafagy
Update the PL111 CLCD driver to use DRM print macros drm_*() instead of dev_*(). This change ensures consistency with DRM subsystem logging conventions [1]. [1] Link: https://docs.kernel.org/gpu/todo.html#convert-logging-to-drm-functions-with-drm-device-parameter Signed-off-by: Eslam Khafagy <eslam.medhat1993@gmail.com> Signed-off-by: Linus Walleij <linusw@kernel.org> Link: https://patch.msgid.link/20251125193845.425416-1-eslam.medhat1993@gmail.com
2025-12-11Merge tag 'alpha-for-v6.19-tag' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/lindholm/alpha Pull alpha updates from Magnus Lindholm: "Two small uapi fixes. One patch hardcodes TC* ioctl values that previously depended on the deprecated termio struct, avoiding build issues with newer glibc versions. The other patch switches uapi headers to use the compiler-defined __ASSEMBLER__ macro for better consistency between kernel and userspace. - don't reference obsolete termio struct for TC* constants - Replace __ASSEMBLY__ with __ASSEMBLER__ in the alpha headers" * tag 'alpha-for-v6.19-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/lindholm/alpha: alpha: don't reference obsolete termio struct for TC* constants alpha: Replace __ASSEMBLY__ with __ASSEMBLER__ in the alpha headers
2025-12-11Merge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rmk/linuxLinus Torvalds
Pull ARM updates from Russell King: - disable jump label and high PTE for PREEMPT RT kernels - fix input operand modification in load_unaligned_zeropad() - fix hash_name() / fault path induced warnings - fix branch predictor hardening * tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rmk/linux: ARM: fix branch predictor hardening ARM: fix hash_name() fault ARM: allow __do_kernel_fault() to report execution of memory faults ARM: group is_permission_fault() with is_translation_fault() ARM: 9464/1: fix input-only operand modification in load_unaligned_zeropad() ARM: 9461/1: Disable HIGHPTE on PREEMPT_RT kernels ARM: 9459/1: Disable jump-label on PREEMPT_RT
2025-12-10drm/amdgpu: Set xcp id for mes ringHawking Zhang
Set xcp id for mes ring Signed-off-by: Hawking Zhang <Hawking.Zhang@amd.com> Reviewed-by: Likun Gao <Likun.Gao@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2025-12-10drm/amdgpu: Init partition_mode and xcc_mask for GFX_IMU_PARTITION_SWITCHHawking Zhang
Set partition_mode and physical xcc mask fields in GFX_IMU_PARTITION_SWITCH register v2: cleanup (Alex) Signed-off-by: Hawking Zhang <Hawking.Zhang@amd.com> Reviewed-by: Likun Gao <Likun.Gao@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2025-12-10drm/amdgpu: Initialize vram_info for gmc v12_1Hawking Zhang
Initialize vram_info for gmc v12_1 Signed-off-by: Hawking Zhang <Hawking.Zhang@amd.com> Reviewed-by: Likun Gao <Likun.Gao@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2025-12-10drm/amdgpu: Init compute partition mode for gfx v12_1Hawking Zhang
Init compute partition mode for gfx v12_1 Signed-off-by: Hawking Zhang <Hawking.Zhang@amd.com> Reviewed-by: Likun Gao <Likun.Gao@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2025-12-10drm/amdgpu: Initialize memory ranges for gmc v12_1Hawking Zhang
Initialize memory ranges for gmc v12_1 Signed-off-by: Hawking Zhang <Hawking.Zhang@amd.com> Reviewed-by: Likun Gao <Likun.Gao@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2025-12-10drm/amdgpu: Initialize memory partition callbacks for gmc v12_1Hawking Zhang
Initialize memory partition callbacks for gmv v12_1 Signed-off-by: Hawking Zhang <Hawking.Zhang@amd.com> Reviewed-by: Likun Gao <Likun.Gao@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2025-12-10drm/amdgpu: support rlc autoload for muti-xccLikun Gao
Support rlc autload for muti-xcc on gfx v12_1. Signed-off-by: Likun Gao <Likun.Gao@amd.com> Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2025-12-10drm/amdgpu: Enable atomics for all the available xccHawking Zhang
Apply TCP_UTCL0_CNTL1 settings to all the available xcc Signed-off-by: Hawking Zhang <Hawking.Zhang@amd.com> Reviewed-by: Likun Gao <Likun.Gao@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2025-12-10drm/amdgpu: Update MES VM_CNTX_CNTL for XNACK off for GFX 12.1Mukul Joshi
Currently, we do not turn off retry faults in VM_CONTEXT_CNTL value when passing it to MES if XNACK is off. This creates a situation where XNACK is disabled in SQ but enabled in UTCL2, which is not recommended. As a result, turn off/on retry faults in both SQ and UTCL2 when passing vm_context_cntl value to MES if XNACK is disabled/enabled. Suggested-by: Jay Cornwall <jay.cornwall@amd.com> Signed-off-by: Mukul Joshi <mukul.joshi@amd.com> Reviewed-by: Philip Yang <Philip.Yang@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2025-12-10drm/amdkfd: Enable per-process XNACK for GFX 12.1.0Mukul Joshi
GFX 12.1.0 will support enabling/disabling XNACK on a per- process basis. This change enables the per process XNACK feature. Signed-off-by: Mukul Joshi <mukul.joshi@amd.com> Reviewed-by: Philip Yang <Philip.Yang@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2025-12-10drm/amdgpu: Enable retry faults for GFX 12.1Mukul Joshi
Enable retry faults in both GCVM/MMVM Context1 Control and L2_PROTECTION_FAULT_CNTL2 registers for GFX 12.1. Signed-off-by: Mukul Joshi <mukul.joshi@amd.com> Reviewed-by: Philip Yang <Philip.Yang@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2025-12-10drm/amdgpu: Add IH node-id to XCC mappingMukul Joshi
Add a generic function to map IH node-id to XCC instance. Signed-off-by: Likun Gao <Likun.Gao@amd.com> Signed-off-by: Mukul Joshi <mukul.joshi@amd.com> Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2025-12-10drm/amdgpu: Add interrupt handler for GFX 12.1.0Mukul Joshi
Add a separate interrupt handler for handling interrupts, both retry and no-retry, for GFX 12.1.0. Signed-off-by: Mukul Joshi <mukul.joshi@amd.com> Reviewed-by: Philip Yang <Philip.Yang@amd.com> Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2025-12-10drm/amdgpu: Add UTCL2 Retry fault interrupt for GFX 12.1Mukul Joshi
Add the UTCL2 retry fault interrupt for both GCVM and MMVM for GFX 12.1. Signed-off-by: Mukul Joshi <mukul.joshi@amd.com> Reviewed-by: Philip Yang <Philip.Yang@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2025-12-10drm/amdgpu/sdma: add query for CSA size and alignmentAlex Deucher
Needed to query the CSA size and alignment for SDMA user queues. Reviewed-by: Prike Liang <Prike.Liang@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2025-12-10drm/amdgpu: fix mes packet params issue when flush hdp.chong li
v4: use func "amdgpu_gfx_get_hdp_flush_mask" to get ref_and_mask for gfx9 through gfx12. v3: Unify the get_ref_and_mask function in amdgpu_gfx_funcs, to support both GFX11 and earlier generations v2: place "get_ref_and_mask" in amdgpu_gfx_funcs instead of amdgpu_ring, since this function only assigns the cp entry. v1: both gfx ring and mes ring use cp0 to flush hdp, cause conflict. use function get_ref_and_mask to assign the cp entry. reassign mes to use cp8 instead. Signed-off-by: chong li <chongli2@amd.com> Acked-by: Lijo Lazar <lijo.lazar@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2025-12-10drm/amdgpu/gfx: add eop size and alignment to shadow infoAlex Deucher
This is used by firmware for compute user queues. Reviewed-by: Prike Liang <Prike.Liang@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2025-12-10drm/amd/ras: Add vram_type to ras_ta_init_flagsCandice Li
Add vram_type to ras_ta_init_flags. Signed-off-by: Candice Li <candice.li@amd.com> Reviewed-by: Tao Zhou <tao.zhou1@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2025-12-10drm/amdgpu: update sdma configuration for soc v1_0Likun Gao
Update SDMA instances/masks according to xcc num for multi-xcc models on soc v1.0. Signed-off-by: Likun Gao <Likun.Gao@amd.com> Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2025-12-10drm/amdgpu: Initialize xcp manager for soc v1_0Hawking Zhang
Initialize xcp manager for soc v1_0 Signed-off-by: Hawking Zhang <Hawking.Zhang@amd.com> Reviewed-by: Likun Gao <Likun.Gao@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2025-12-10drm/amdgpu: Add soc_v1_0_xcp_funcsHawking Zhang
Implement xcp mgr callbacks for soc v1_0 Signed-off-by: Hawking Zhang <Hawking.Zhang@amd.com> Reviewed-by: Likun Gao <Likun.Gao@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2025-12-10drm/amdgpu: Export sdma_v7_1_xcp_funcsHawking Zhang
To be used by soc v1_0 xcp manager Signed-off-by: Hawking Zhang <Hawking.Zhang@amd.com> Reviewed-by: Likun Gao <Likun.Gao@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2025-12-10drm/amdgpu: Export gfx_v12_1_xcp_funcHawking Zhang
To be used by soc v1_0 xcp manager Signed-off-by: Hawking Zhang <Hawking.Zhang@amd.com> Reviewed-by: Likun Gao <Likun.Gao@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2025-12-10drm/amdgpu: Add vram_type to ras init_flagsCandice Li
Add vram_type to ras init_flags. Signed-off-by: Candice Li <candice.li@amd.com> Reviewed-by: Tao Zhou <tao.zhou1@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2025-12-10drm/amd/ras: Reduce stack usage in amdgpu_virt_ras_get_cper_records()Srinivasan Shanmugam
amdgpu_virt_ras_get_cper_records() was using a large stack array of ras_log_info pointers. This contributed to the frame size warning on this function. Replace the fixed-size stack array: struct ras_log_info *trace[MAX_RECORD_PER_BATCH]; with a heap-allocated array using kcalloc(). We free the trace buffer together with out_buf on all exit paths. If allocation of trace or out_buf fails, we return a generic RAS error code. This reduces stack usage and keeps the runtime behaviour unchanged. Fixes: stack frame size: 1112 bytes (limit: 1024) Cc: Tao Zhou <tao.zhou1@amd.com> Cc: Hawking Zhang <Hawking.Zhang@amd.com> Cc: Christian König <christian.koenig@amd.com> Cc: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Srinivasan Shanmugam <srinivasan.shanmugam@amd.com> Reviewed-by: Tao Zhou <tao.zhou1@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2025-12-10drm/amdkfd: Handle GPU reset and drain retry fault racePhilip Yang
Only check and drain IH1 ring if CAM is not enabled. If GPU is under reset, don't access IH to drain retry fault. Signed-off-by: Philip Yang <Philip.Yang@amd.com> Reviewed-by: Harish Kasiviswanathan <Harish.Kasiviswanathan@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2025-12-10Revert "drm/amd/display: Fix pbn to kbps Conversion"Mario Limonciello
Deeply daisy chained DP/MST displays are no longer able to light up. This reverts commit e0dec00f3d05 ("drm/amd/display: Fix pbn to kbps Conversion") Cc: Jerry Zuo <jerry.zuo@amd.com> Reported-by: nat@nullable.se Closes: https://gitlab.freedesktop.org/drm/amd/-/issues/4756 Signed-off-by: Mario Limonciello <mario.limonciello@amd.com> Acked-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2025-12-10drm/amdgpu: Add switch_compute_partition callback for imu v12_1Hawking Zhang
To enable switching compute partition mode v2: cleanup (Alex) Signed-off-by: Hawking Zhang <Hawking.Zhang@amd.com> Reviewed-by: Likun Gao <Likun.Gao@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2025-12-10drm/amdgpu: Implement gfx_v12_1_get_xccs_per_xcpHawking Zhang
Use gfx v12_1 callback to query the numbers of xccs per xcp v2: add todo (Alex) Signed-off-by: Hawking Zhang <Hawking.Zhang@amd.com> Reviewed-by: Le Ma <le.ma@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2025-12-10drm/amdgpu: Remove redundant check for async_gfx_ringHawking Zhang
Remove the redundant check for async_gfx_ring, as it is not required for gfx v12_1 Signed-off-by: Hawking Zhang <Hawking.Zhang@amd.com> Reviewed-by: Likun Gao <Likun.Gao@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2025-12-10drm/amdgpu: disable graphics doorbell range for gfx v12_1Likun Gao
Disable doorbell range for graphics engine on gfx v12_1. Signed-off-by: Likun Gao <Likun.Gao@amd.com> Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2025-12-10drm/amdgpu: enable unmap doorbell handle for gfx v12_1Likun Gao
Enable unmapped doorbell handling for gfx v12_1. Signed-off-by: Likun Gao <Likun.Gao@amd.com> Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2025-12-10drm/amdgpu: revision doorbel range for gfx v12_1Likun Gao
Revision doorbell range on muti-XCC mode for gfx v12_1. Clean up doorbell range set for graphics engine. V2: Remove doorbell range set from gfx_v12_1_xcc_kiq_init_register. Signed-off-by: Likun Gao <Likun.Gao@amd.com> Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2025-12-10drm/amdkfd: disable shader message vgpr deallocation on gc 12.1Jonathan Kim
Shader messages to deallocate VGPRs prior to shader end can prevent the trap handler from saving context, making debugging and core dumps unreliable. VGPR deallocations for performance gain is negligible. GC 12.1 will NOP shader VGPR deallocation messages via HW settings on driver boot. Signed-off-by: Jonathan Kim <jonathan.kim@amd.com> Acked-by: Harish Kasiviswanathan <harish.kasiviswanathan@amd.com> Reviewed-by: Felix Kuehling <felix.kuehling@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2025-12-10drm/amdgpu: Remove redundant pmfw backdoor loadingHawking Zhang
PMFW is integrated into ifwi for gfx 12_1 adapter, making PMFW backdoor loading unnecessary. Signed-off-by: Hawking Zhang <Hawking.Zhang@amd.com> Reviewed-by: Likun Gao <Likun.Gao@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2025-12-10drm/amd: Fix unbind/rebind for VCN 4.0.5Mario Limonciello (AMD)
Unbinding amdgpu has no problems, but binding it again leads to an error of sysfs file already existing. This is because it wasn't actually cleaned up on unbind. Add the missing cleanup step. Fixes: 547aad32edac ("drm/amdgpu: add VCN4 ip block support") Signed-off-by: Mario Limonciello (AMD) <superm1@kernel.org> Reviewed-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2025-12-10drm/amdgpu/acpi: Reduce amdgpu_acpi_detect stack usageSrinivasan Shanmugam
amdgpu_acpi_detect() calls some helper functions it calls have large local structures. When the compiler inlines these helpers, their local data adds to the amdgpu_acpi_detect() stack frame. Mark the helpers with noinline_for_stack: - amdgpu_atif_verify_interface() - amdgpu_atif_get_notification_params() - amdgpu_atif_query_backlight_caps() - amdgpu_atcs_verify_interface() - amdgpu_acpi_enumerate_xcc() This keeps the large temporary objects inside the helper’s own stack frame instead of being inlined into the caller, preventing the caller from growing beyond the stack limit. Fixes the below with gcc W=1: drivers/gpu/drm/amd/amdgpu/amdgpu_acpi.c:1403:6: warning: stack frame size (1688) exceeds limit (1024) in 'amdgpu_acpi_detect' [-Wframe-larger-than] Cc: Alex Deucher <alexander.deucher@amd.com> Cc: Christian König <christian.koenig@amd.com> Signed-off-by: Srinivasan Shanmugam <srinivasan.shanmugam@amd.com> Acked-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2025-12-10blk-mq-dma: always initialize dma stateKeith Busch
Ensure the dma state is initialized when we're not using the contiguous iova, otherwise the caller may be using a stale state from a previous request that could use the coalesed iova allocation. Fixes: 2f6b2565d43cdb5 ("block: accumulate memory segment gaps per bio") Reported-by: Sebastian Ott <sebott@redhat.com> Tested-by: Sebastian Ott <sebott@redhat.com> Signed-off-by: Keith Busch <kbusch@kernel.org> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2025-12-10dm pcache: fix segment info indexingLi Chen
Segment info indexing also used sizeof(struct) instead of the 4K metadata stride, so info_index could point between slots and subsequent writes would advance incorrectly. Derive info_index from the pointer returned by the segment meta search using PCACHE_SEG_INFO_SIZE and advance to the next slot for future updates. Signed-off-by: Li Chen <chenl311@chinatelecom.cn> Signed-off-by: Dongsheng Yang <dongsheng.yang@linux.dev> Signed-off-by: Mikulas Patocka <mpatocka@redhat.com> Reviewed-by: Zheng Gu <cengku@gmail.com> Cc: stable@vger.kernel.org # 6.18
2025-12-10dm pcache: fix cache info indexingLi Chen
The on-media cache_info index used sizeof(struct) instead of the 4K metadata stride, so gc_percent updates from dmsetup message were written between slots and lost after reboot. Use PCACHE_CACHE_INFO_SIZE in get_cache_info_addr() and align info_index with the slot returned by pcache_meta_find_latest(). Signed-off-by: Li Chen <chenl311@chinatelecom.cn> Signed-off-by: Dongsheng Yang <dongsheng.yang@linux.dev> Signed-off-by: Mikulas Patocka <mpatocka@redhat.com> Reviewed-by: Zheng Gu <cengku@gmail.com> Cc: stable@vger.kernel.org # 6.18
2025-12-10dm-pcache: advance slot index before writing slotDongsheng Yang
In dm-pcache, in order to ensure crash-consistency, a dual-copy scheme is used to alternately update metadata, and there is a slot index that records the current slot. However, in the write path the current implementation writes directly to the current slot indexed by slot index, and then advances the slot — which ends up overwriting the existing slot, violating the crash-consistency guarantee. This patch fixes that behavior, preventing metadata from being overwritten incorrectly. In addition, this patch add a missing pmem_wmb() after memcpy_flushcache(). Signed-off-by: Dongsheng Yang <dongsheng.yang@linux.dev> Signed-off-by: Mikulas Patocka <mpatocka@redhat.com> Reviewed-by: Zheng Gu <cengku@gmail.com> Cc: stable@vger.kernel.org # 6.18
2025-12-10dm raid: add documentation for takeover/reshape raid1 -> raid5 table line ↵Heinz Mauelshagen
examples Also enhance possible takeover/reshape information and do some reformatting. Signed-off-by: Heinz Mauelshagen <heinzm@redhat.com> Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
2025-12-10dm log-writes: Add missing set_freezable() for freezable kthreadHaotian Zhang
The log_writes_kthread() calls try_to_freeze() but lacks set_freezable(), rendering the freeze attempt ineffective since kernel threads are non-freezable by default. This prevents proper thread suspension during system suspend/hibernate. Add set_freezable() to explicitly mark the thread as freezable. Fixes: 0e9cebe72459 ("dm: add log writes target") Signed-off-by: Haotian Zhang <vulab@iscas.ac.cn> Reviewed-by: Benjamin Marzinski <bmarzins@redhat.com> Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
2025-12-10dm-raid: fix possible NULL dereference with undefined raid typeAlexey Simakov
rs->raid_type is assigned from get_raid_type_by_ll(), which may return NULL. This NULL value could be dereferenced later in the condition 'if (!(rs_is_raid10(rs) && rt_is_raid0(rs->raid_type)))'. Add a fail-fast check to return early with an error if raid_type is NULL, similar to other uses of this function. Found by Linux Verification Center (linuxtesting.org) with Svace. Fixes: 33e53f06850f ("dm raid: introduce extended superblock and new raid types to support takeover/reshaping") Signed-off-by: Alexey Simakov <bigalex934@gmail.com> Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
2025-12-10dm-snapshot: fix 'scheduling while atomic' on real-time kernelsMikulas Patocka
There is reported 'scheduling while atomic' bug when using dm-snapshot on real-time kernels. The reason for the bug is that the hlist_bl code does preempt_disable() when taking the lock and the kernel attempts to take other spinlocks while holding the hlist_bl lock. Fix this by converting a hlist_bl spinlock into a regular spinlock. Signed-off-by: Mikulas Patocka <mpatocka@redhat.com> Reported-by: Jiping Ma <jiping.ma2@windriver.com>
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