Add devm_drm_panel_add(), devres-managed version of drm_panel_add().
It's not uncommon for the panel drivers to use devres functions for most
of the resources. Provide corresponding replacement for drm_panel_add().
Reviewed-by: Linus Walleij <linusw@kernel.org>
Link: https://patch.msgid.link/20260413-waveshare-dsi-touch-v3-18-3aeb53022c32@oss.qualcomm.com
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Sending DSI commands from the prepare() callback requires DSI link to be
up at that point. For DSI hosts is guaranteed only if the panel driver
sets the .prepare_prev_first flag. Set it to let these panels work with
the DSI hosts which don't power on the link in their .mode_set callback.
Reviewed-by: Linus Walleij <linusw@kernel.org>
Tested-by: Riccardo Mereu <r.mereu@arduino.cc>
Link: https://patch.msgid.link/20260413-waveshare-dsi-touch-v3-13-3aeb53022c32@oss.qualcomm.com
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Several panels support attachment either using 4 DSI lanes or just 2. In
some cases, this requires a different panel mode to fulfill clock
requirements. Extend the driver to handle such cases by letting the
panel description to omit lanes specification and parsing number of
lanes from the DT.
Reviewed-by: Linus Walleij <linusw@kernel.org>
Tested-by: Riccardo Mereu <r.mereu@arduino.cc>
Link: https://patch.msgid.link/20260413-waveshare-dsi-touch-v3-12-3aeb53022c32@oss.qualcomm.com
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Simplify hx8394_enable() function by using hx8394_disable() instead of
open-coding it and mipi_dsi_msleep() instead of manual checks.
Reviewed-by: Linus Walleij <linusw@kernel.org>
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
Link: https://patch.msgid.link/20260413-waveshare-dsi-touch-v3-9-3aeb53022c32@oss.qualcomm.com
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Sending DSI commands from the prepare() callback requires DSI link to be
up at that point. For DSI hosts is guaranteed only if the panel driver
sets the .prepare_prev_first flag. Set it to let these panels work with
the DSI hosts which don't power on the link in their .mode_set callback.
Reviewed-by: Linus Walleij <linusw@kernel.org>
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
Link: https://patch.msgid.link/20260413-waveshare-dsi-touch-v3-8-3aeb53022c32@oss.qualcomm.com
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Add support for the Waveshare 12.3" DSI TOUCH-A panel. According to the
vendor driver, it uses different mode_flags, so let the panel
descriptions override driver-wide defaults.
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://patch.msgid.link/20260413-waveshare-dsi-touch-v3-7-3aeb53022c32@oss.qualcomm.com
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
If the DSI panel supports versatile lanes configuration, its driver
might require determining the number of DSI data lanes, which is usually
specified on the DSI host side of the OF graph. Add new helper as a
pair to drm_of_get_data_lanes_count_ep() that lets callers determine
number of data-lanes on the remote side of the OF graph.
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
Link: https://patch.msgid.link/20260413-waveshare-dsi-touch-v3-6-3aeb53022c32@oss.qualcomm.com
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Add schema for the panels using Focaltech OTA7290B controller. For now
there is only one such panel, from the Waveshare 8.8 DSI TOUCH-A kit.
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Link: https://patch.msgid.link/20260413-waveshare-dsi-touch-v3-5-3aeb53022c32@oss.qualcomm.com
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
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Merge tag 'bpf-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf
Pull bpf fixes from Alexei Starovoitov:
"Most of the diff stat comes from Xu Kuohai's fix to emit ENDBR/BTI,
since all JITs had to be touched to move constant blinding out and
pass bpf_verifier_env in.
- Fix use-after-free in arena_vm_close on fork (Alexei Starovoitov)
- Dissociate struct_ops program with map if map_update fails (Amery
Hung)
- Fix out-of-range and off-by-one bugs in arm64 JIT (Daniel Borkmann)
- Fix precedence bug in convert_bpf_ld_abs alignment check (Daniel
Borkmann)
- Fix arg tracking for imprecise/multi-offset in BPF_ST/STX insns
(Eduard Zingerman)
- Copy token from main to subprogs to fix missing kallsyms (Eduard
Zingerman)
- Prevent double close and leak of btf objects in libbpf (Jiri Olsa)
- Fix af_unix null-ptr-deref in sockmap (Michal Luczaj)
- Fix NULL deref in map_kptr_match_type for scalar regs (Mykyta
Yatsenko)
- Avoid unnecessary IPIs. Remove redundant bpf_flush_icache() in
arm64 and riscv JITs (Puranjay Mohan)
- Fix out of bounds access. Validate node_id in arena_alloc_pages()
(Puranjay Mohan)
- Reject BPF-to-BPF calls and callbacks in arm32 JIT (Puranjay Mohan)
- Refactor all JITs to pass bpf_verifier_env to emit ENDBR/BTI for
indirect jump targets on x86-64, arm64 JITs (Xu Kuohai)
- Allow UTF-8 literals in bpf_bprintf_prepare() (Yihan Ding)"
* tag 'bpf-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf: (32 commits)
bpf, arm32: Reject BPF-to-BPF calls and callbacks in the JIT
bpf: Dissociate struct_ops program with map if map_update fails
bpf: Validate node_id in arena_alloc_pages()
libbpf: Prevent double close and leak of btf objects
selftests/bpf: cover UTF-8 trace_printk output
bpf: allow UTF-8 literals in bpf_bprintf_prepare()
selftests/bpf: Reject scalar store into kptr slot
bpf: Fix NULL deref in map_kptr_match_type for scalar regs
bpf: Fix precedence bug in convert_bpf_ld_abs alignment check
bpf, arm64: Emit BTI for indirect jump target
bpf, x86: Emit ENDBR for indirect jump targets
bpf: Add helper to detect indirect jump targets
bpf: Pass bpf_verifier_env to JIT
bpf: Move constants blinding out of arch-specific JITs
bpf, sockmap: Take state lock for af_unix iter
bpf, sockmap: Fix af_unix null-ptr-deref in proto update
selftests/bpf: Extend bpf_iter_unix to attempt deadlocking
bpf, sockmap: Fix af_unix iter deadlock
bpf, sockmap: Annotate af_unix sock:: Sk_state data-races
selftests/bpf: verify kallsyms entries for token-loaded subprograms
...
Misc patches:
tools/testing/cxl: Enable replay of user regions as auto regions
cxl/region: Add a region sysfs interface for region lock status
cxl/core: Check existence of cxl_memdev_state in poison test
cxl: Add endpoint decoder flags clear when PCI reset happens
ACPI: NUMA: Only parse CFMWS at boot when CXL_ACPI is on
MAINTAINERS: Update address for Dan Williams
cxl/hdm: Add support for 32 switch decoders
MAINTAINERS: Update Jonathan Cameron's email address
Ensure endppoint complete initialization before usage:
cxl/pci: Check memdev driver binding status in cxl_reset_done()
cxl/pci: Hold memdev lock in cxl_event_trace_record()
Type2 prepatory patches:
cxl/region: Factor out interleave granularity setup
cxl/region: Factor out interleave ways setup
cxl: Make region type based on endpoint type
cxl/pci: Remove redundant cxl_pci_find_port() call
cxl: Move pci generic code from cxl_pci to core/cxl_pci
cxl: export internal structs for external Type2 drivers
cxl: support Type2 when initializing cxl_dev_state
Patch series that deals with soft reserved memory conflict between CXL and HMEM:
tools/testing/cxl: Test dax_hmem takeover of CXL regions
tools/testing/cxl: Simulate auto-assembly failure
dax/hmem: Parent dax_hmem devices
dax/hmem: Fix singleton confusion between dax_hmem_work and hmem devices
dax/hmem: Reduce visibility of dax_cxl coordination symbols
cxl/region: Constify cxl_region_resource_contains()
cxl/region: Limit visibility of cxl_region_contains_resource()
dax/cxl: Fix HMEM dependencies
cxl/region: Fix use-after-free from auto assembly failure
dax/hmem, cxl: Defer and resolve Soft Reserved ownership
cxl/region: Add helper to check Soft Reserved containment by CXL regions
dax: Track all dax_region allocations under a global resource tree
dax/cxl, hmem: Initialize hmem early and defer dax_cxl binding
dax/hmem: Gate Soft Reserved deferral on DEV_DAX_CXL
dax/hmem: Request cxl_acpi and cxl_pci before walking Soft Reserved ranges
dax/hmem: Factor HMEM registration into __hmem_register_device()
dax/bus: Use dax_region_put() in alloc_dax_region() error path
Refactor CXL core/region code to make region code more manageable by
splitting out DAX and PMEM code from RAM handling code:
cxl/core: use cleanup.h for devm_cxl_add_dax_region
cxl/core/region: move dax region device logic into region_dax.c
cxl/core/region: move pmem region driver logic into region_pmem.c
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Merge tag 'cxl-for-7.1' of git://git.kernel.org/pub/scm/linux/kernel/git/cxl/cxl
Pull CXL (Compute Express Link) updates from Dave Jiang:
"The significant change of interest is the handling of soft reserved
memory conflict between CXL and HMEM. In essence CXL will be the first
to claim the soft reserved memory ranges that belongs to CXL and
attempt to enumerate them with best effort. If CXL is not able to
enumerate the ranges it will punt them to HMEM.
There are also MAINTAINERS email changes from Dan Williams and
Jonathan Cameron"
* tag 'cxl-for-7.1' of git://git.kernel.org/pub/scm/linux/kernel/git/cxl/cxl: (37 commits)
MAINTAINERS: Update Jonathan Cameron's email address
cxl/hdm: Add support for 32 switch decoders
MAINTAINERS: Update address for Dan Williams
tools/testing/cxl: Enable replay of user regions as auto regions
cxl/region: Add a region sysfs interface for region lock status
tools/testing/cxl: Test dax_hmem takeover of CXL regions
tools/testing/cxl: Simulate auto-assembly failure
dax/hmem: Parent dax_hmem devices
dax/hmem: Fix singleton confusion between dax_hmem_work and hmem devices
dax/hmem: Reduce visibility of dax_cxl coordination symbols
cxl/region: Constify cxl_region_resource_contains()
cxl/region: Limit visibility of cxl_region_contains_resource()
dax/cxl: Fix HMEM dependencies
cxl/region: Fix use-after-free from auto assembly failure
cxl/core: Check existence of cxl_memdev_state in poison test
cxl/core: use cleanup.h for devm_cxl_add_dax_region
cxl/core/region: move dax region device logic into region_dax.c
cxl/core/region: move pmem region driver logic into region_pmem.c
dax/hmem, cxl: Defer and resolve Soft Reserved ownership
cxl/region: Add helper to check Soft Reserved containment by CXL regions
...
This pull request contains kernel-doc updates for the stop_machine()
and stop_machine_cpuslocked() functions.
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Merge tag 'stop-machine.2026.04.16a' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu
Pull stop-machine update from Paul McKenney:
- kernel-doc updates for stop_machine() and stop_machine_cpuslocked()
functions
* tag 'stop-machine.2026.04.16a' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu:
stop_machine: Fix the documentation for a NULL cpus argument
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Merge tag 'integrity-v7.1' of git://git.kernel.org/pub/scm/linux/kernel/git/zohar/linux-integrity
Pull integrity updates from Mimi Zohar:
"There are two main changes, one feature removal, some code cleanup,
and a number of bug fixes.
Main changes:
- Detecting secure boot mode was limited to IMA. Make detecting
secure boot mode accessible to EVM and other LSMs
- IMA sigv3 support was limited to fsverity. Add IMA sigv3 support
for IMA regular file hashes and EVM portable signatures
Remove:
- Remove IMA support for asychronous hash calculation originally
added for hardware acceleration
Cleanup:
- Remove unnecessary Kconfig CONFIG_MODULE_SIG and CONFIG_KEXEC_SIG
tests
- Add descriptions of the IMA atomic flags
Bug fixes:
- Like IMA, properly limit EVM "fix" mode
- Define and call evm_fix_hmac() to update security.evm
- Fallback to using i_version to detect file change for filesystems
that do not support STATX_CHANGE_COOKIE
- Address missing kernel support for configured (new) TPM hash
algorithms
- Add missing crypto_shash_final() return value"
* tag 'integrity-v7.1' of git://git.kernel.org/pub/scm/linux/kernel/git/zohar/linux-integrity:
evm: Enforce signatures version 3 with new EVM policy 'bit 3'
integrity: Allow sigv3 verification on EVM_XATTR_PORTABLE_DIGSIG
ima: add support to require IMA sigv3 signatures
ima: add regular file data hash signature version 3 support
ima: Define asymmetric_verify_v3() to verify IMA sigv3 signatures
ima: remove buggy support for asynchronous hashes
integrity: Eliminate weak definition of arch_get_secureboot()
ima: Add code comments to explain IMA iint cache atomic_flags
ima_fs: Correctly create securityfs files for unsupported hash algos
ima: check return value of crypto_shash_final() in boot aggregate
ima: Define and use a digest_size field in the ima_algo_desc structure
powerpc/ima: Drop unnecessary check for CONFIG_MODULE_SIG
ima: efi: Drop unnecessary check for CONFIG_MODULE_SIG/CONFIG_KEXEC_SIG
ima: fallback to using i_version to detect file change
evm: fix security.evm for a file with IMA signature
s390: Drop unnecessary CONFIG_IMA_SECURE_AND_OR_TRUSTED_BOOT
evm: Don't enable fix mode when secure boot is enabled
integrity: Make arch_ima_get_secureboot integrity-wide
Remove the unused u8500 hardware spinlock driver, and clean out the
hwspinlock_pdata struct as this was the last user of the struct.
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Merge tag 'hwlock-v7.1' of git://git.kernel.org/pub/scm/linux/kernel/git/remoteproc/linux
Pull hwspinlock updates from Bjorn Andersson:
"Remove the unused u8500 hardware spinlock driver, and clean out the
hwspinlock_pdata struct as this was the last user of the struct"
* tag 'hwlock-v7.1' of git://git.kernel.org/pub/scm/linux/kernel/git/remoteproc/linux:
hwspinlock: remove now unused pdata from header file
hwspinlock: u8500: delete driver
Mark "data" argument in rpmsg_send() const, and perculate to related
drivers. Replace deprecated class_destroy() with class_unregister().
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Merge tag 'rpmsg-v7.1' of git://git.kernel.org/pub/scm/linux/kernel/git/remoteproc/linux
Pull rpmsg updates from Bjorn Andersson:
"Mark 'data' argument in rpmsg_send() const, and perculate to related
drivers. Replace deprecated class_destroy() with class_unregister()"
* tag 'rpmsg-v7.1' of git://git.kernel.org/pub/scm/linux/kernel/git/remoteproc/linux:
media: platform: mtk-mdp3: Constify buffer passed to mdp_vpu_sendmsg()
ASoC: qcom: Constify GPR packet being send over GPR interface
rpmsg: Constify buffer passed to send API
remoteproc: mtk_scp: Constify buffer passed to scp_send_ipi()
remoteproc: mtk_scp_ipi: Constify buffer passed to scp_ipi_send()
drivers: rpmsg: class_destroy() is deprecated
Move requesting of IRQs in TI Keystone driver to probe time instead of
remoteproc start, to allow better handling of errors.
Introduce support for more than 10 entries in the Qualcomm minidump
implementation.
Add audio DSP remoteproc support for the Qualcomm Eliza platform. Add
modem remoteproc support for the Qualcomm MDM9607, MSM8917, MSM8937, and
MSM8940 platforms.
Add list of Qualcomm QMI service ids to the QMI header file, in order to
avoid sprinkling them across the various drivers using them. Migrate
sysmon to use this constant.
Fix several issues related to DeviceTree parsing and mailbox handling in
the Xilinx R5F remote processor driver.
Fix incorrect error checks in reserved memory handling and polish the
code across i.MX and TI drivers.
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Merge tag 'rproc-v7.1' of git://git.kernel.org/pub/scm/linux/kernel/git/remoteproc/linux
Pull remoteproc updates from Bjorn Andersson:
- Move requesting of IRQs in TI Keystone driver to probe time instead
of remoteproc start, to allow better handling of errors.
- Introduce support for more than 10 entries in the Qualcomm minidump
implementation.
- Add audio DSP remoteproc support for the Qualcomm Eliza platform. Add
modem remoteproc support for the Qualcomm MDM9607, MSM8917, MSM8937,
and MSM8940 platforms.
- Add list of Qualcomm QMI service ids to the QMI header file, in order
to avoid sprinkling them across the various drivers using them.
Migrate sysmon to use this constant.
- Fix several issues related to DeviceTree parsing and mailbox handling
in the Xilinx R5F remote processor driver.
- Fix incorrect error checks in reserved memory handling and polish the
code across i.MX and TI drivers.
* tag 'rproc-v7.1' of git://git.kernel.org/pub/scm/linux/kernel/git/remoteproc/linux: (35 commits)
remoteproc: qcom: pas: Add Eliza ADSP support
dt-bindings: remoteproc: qcom,milos-pas: Document Eliza ADSP
remoteproc: qcom: Add missing space before closing bracket
dt-bindings: remoteproc: qcom: Drop types for firmware-name
remoteproc: qcom: Fix minidump out-of-bounds access on subsystems array
dt-bindings: remoteproc: k3-r5f: Add memory-region-names
dt-bindings: remoteproc: k3-r5f: Split up memory regions
remoteproc: use SIZE_MAX in rproc_u64_fit_in_size_t()
dt-bindings: remoteproc: qcom,sm8550-pas: Add Glymur CDSP
dt-bindings: remoteproc: qcom,sm8550-pas: Add Glymur ADSP
remoteproc: xlnx: Release mailbox channels on shutdown
remoteproc: sysmon: Use the unified QMI service ID instead of defining it locally
remoteproc: xlnx: Only access buffer information if IPI is buffered
remoteproc: xlnx: Avoid mailbox setup
remoteproc: keystone: Request IRQs in probe()
remoteproc: pru: Remove empty remove callback
remoteproc: pru: Use rproc_of_parse_firmware() to get firmware name
remoteproc: da8xx: Reorder resource fetching in probe()
remoteproc: da8xx: Remove unused local struct data
remoteproc: da8xx: Use dev_err_probe()
...
The changes for the hte/timestamp subsystem include the following:
- Add tegra264 HTE driver and dt binding support
- Remove tegra194 SoC Kconfig dependency
- Replace use of system_unbound_wq with system_dfl_wq
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Merge tag 'for-7.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/pateldipen1984/linux
Pull hte updates from Dipen Patel:
- Add tegra264 HTE driver and dt binding support
- Remove tegra194 SoC Kconfig dependency
- Replace use of system_unbound_wq with system_dfl_wq
* tag 'for-7.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/pateldipen1984/linux:
hte: tegra194: Add Tegra264 GTE support
dt-bindings: timestamp: Add Tegra264 support
hte: tegra194: remove Kconfig dependency on Tegra194 SoC
hte: replace use of system_unbound_wq with system_dfl_wq
This continues the effort to refactor workqueue APIs, which began with
the introduction of new workqueues and a new alloc_workqueue flag in:
commit 128ea9f6cc ("workqueue: Add system_percpu_wq and system_dfl_wq")
commit 930c2ea566 ("workqueue: Add new WQ_PERCPU flag")
The refactoring is going to alter the default behavior of
alloc_workqueue() to be unbound by default.
With the introduction of the WQ_PERCPU flag (equivalent to !WQ_UNBOUND),
any alloc_workqueue() caller that doesn’t explicitly specify WQ_UNBOUND
must now use WQ_PERCPU. For more details see the Link tag below.
In order to keep alloc_workqueue() behavior identical, explicitly request
WQ_PERCPU.
Cc: Josef Bacik <josef@toxicpanda.com>
Cc: cgroups@vger.kernel.org
Link: https://lore.kernel.org/all/20250221112003.1dSuoGyc@linutronix.de/
Suggested-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Marco Crivellari <marco.crivellari@suse.com>
Link: https://patch.msgid.link/20260223092920.60424-3-marco.crivellari@suse.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This continues the effort to refactor workqueue APIs, which began with
the introduction of new workqueues and a new alloc_workqueue flag in:
commit 128ea9f6cc ("workqueue: Add system_percpu_wq and system_dfl_wq")
commit 930c2ea566 ("workqueue: Add new WQ_PERCPU flag")
The refactoring is going to alter the default behavior of
alloc_workqueue() to be unbound by default.
With the introduction of the WQ_PERCPU flag (equivalent to !WQ_UNBOUND),
any alloc_workqueue() caller that doesn’t explicitly specify WQ_UNBOUND
must now use WQ_PERCPU. For more details see the Link tag below.
In order to keep alloc_workqueue() behavior identical, explicitly request
WQ_PERCPU.
Link: https://lore.kernel.org/all/20250221112003.1dSuoGyc@linutronix.de/
Suggested-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Marco Crivellari <marco.crivellari@suse.com>
Link: https://patch.msgid.link/20260223092920.60424-2-marco.crivellari@suse.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
bio_add_page() and bio_integrity_add_page() reject pages from different
dev_pagemaps entirely, returning 0 even when those pages have compatible
DMA mapping requirements. This forces callers to start a new bio when
buffers span pgmap boundaries, even though the pages could safely coexist
as separate bvec entries.
This matters for guests where memory is registered through
devm_memremap_pages() with MEMORY_DEVICE_GENERIC in multiple calls,
creating separate dev_pagemaps for each chunk. When a direct I/O buffer
spans two such chunks, bio_add_page() rejects the second page, forcing an
unnecessary bio split or I/O failure.
Introduce zone_device_pages_compatible() in blk.h to check whether two
pages can coexist in the same bio as separate bvec entries. The block DMA
iterator (blk_dma_map_iter_start) caches the P2PDMA mapping state from the
first segment and applies it to all others, so P2PDMA pages from different
pgmaps must not be mixed, and neither must P2PDMA and non-P2PDMA pages.
All other combinations (MEMORY_DEVICE_GENERIC pages from different pgmaps,
or MEMORY_DEVICE_GENERIC with normal RAM) use the same dma_map_phys path
and are safe.
Replace the blanket zone_device_pages_have_same_pgmap() rejection with
zone_device_pages_compatible(), while keeping
zone_device_pages_have_same_pgmap() as a merge guard.
Pages from different pgmaps can be added as separate bvec entries but
must not be coalesced into the same segment, as that would make
it impossible to recover the correct pgmap via page_pgmap().
Fixes: 49580e6907 ("block: add check when merging zone device pages")
Cc: stable@vger.kernel.org
Signed-off-by: Naman Jain <namjain@linux.microsoft.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Link: https://patch.msgid.link/20260410153414.4159050-3-namjain@linux.microsoft.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
biovec_phys_mergeable() is used by the request merge, DMA mapping,
and integrity merge paths to decide if two physically contiguous
bvec segments can be coalesced into one. It currently has no check
for whether the segments belong to different dev_pagemaps.
When zone device memory is registered in multiple chunks, each chunk
gets its own dev_pagemap. A single bio can legitimately contain
bvecs from different pgmaps -- iov_iter_extract_bvecs() breaks at
pgmap boundaries but the outer loop in bio_iov_iter_get_pages()
continues filling the same bio. If such bvecs are physically
contiguous, biovec_phys_mergeable() will coalesce them, making it
impossible to recover the correct pgmap for the merged segment
via page_pgmap().
Add a zone_device_pages_have_same_pgmap() check to prevent merging
bvec segments that span different pgmaps.
Fixes: 49580e6907 ("block: add check when merging zone device pages")
Cc: stable@vger.kernel.org
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Naman Jain <namjain@linux.microsoft.com>
Link: https://patch.msgid.link/20260410153414.4159050-2-namjain@linux.microsoft.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
When platform_device_register() fails in do_floppy_init(), the embedded
struct device in floppy_device[drive] has already been initialized by
device_initialize(), but the failure path jumps to out_remove_drives
without dropping the device reference for the current drive.
Previously registered floppy devices are cleaned up in out_remove_drives,
but the device for the drive that fails registration is not, leading to
a reference leak.
The issue was identified by a static analysis tool I developed and
confirmed by manual review. Fix this by calling put_device() for the
current floppy device before jumping to the common cleanup path.
Fixes: 94fd0db7bf ("[PATCH] Floppy: Add cmos attribute to floppy driver")
Cc: stable@vger.kernel.org
Signed-off-by: Guangshuo Li <lgs201920130244@gmail.com>
Link: https://patch.msgid.link/20260415145708.3331818-1-lgs201920130244@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Bio pages may originate from slab caches that lack a usercopy region
(e.g. jbd2 frozen metadata buffers allocated via jbd2_alloc()).
When CONFIG_HARDENED_USERCOPY is enabled, copy_to_iter() calls
check_copy_size() which rejects these slab pages, triggering a
kernel BUG in usercopy_abort().
This is a false positive: the data is ordinary block I/O content —
the same data the loop driver writes to its backing file via
vfs_iter_write(). The bvec length is always trusted, so the size
check in check_copy_size() is not needed either.
Switch to _copy_to_iter()/_copy_from_iter() which skip the
check_copy_size() wrapper while the underlying copy_to_user()
remains unchanged.
Acked-by: Caleb Sander Mateos <csander@purestorage.com>
Fixes: 2299ceec36 ("ublk: use copy_{to,from}_iter() for user copy")
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Link: https://patch.msgid.link/20260415230246.808176-1-tom.leiming@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
t10_pi_ref_tag() and ext_pi_ref_tag() are identical except for the final
truncation of the ref tag to 32 or 48 bits. Factor out a helper
full_pi_ref_tag() to return the untruncated ref tag and use it in
t10_pi_ref_tag() and ext_pi_ref_tag().
Signed-off-by: Caleb Sander Mateos <csander@purestorage.com>
Reviewed-by: Anuj Gupta <anuj20.g@samsung.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Link: https://patch.msgid.link/20260415210847.1730016-1-csander@purestorage.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
support new versions of the Allwinner NAND controller.
There are also some DT-binding improvements and cleanups.
Finally a couple of actual fixes (Realtek ECC and Winbond SPI NAND),
aside with the usual load of misc changes.
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Merge tag 'nand/for-7.1' into mtd/next
The main changes happened in the SunXi driver in order to
support new versions of the Allwinner NAND controller.
There are also some DT-binding improvements and cleanups.
Finally a couple of actual fixes (Realtek ECC and Winbond SPI NAND),
aside with the usual load of misc changes.
There is only a collection of bugfixes this time around, with no notable
changes to the core. Some of the more noteworthy bugfixes listed below.
- Enable die erase on MT35XU02GCBA. We knew this flash needed this fixup
since 7f77c561e2 ("mtd: spi-nor: micron-st: add TODO for fixing
mt35xu02gcba") but did not add it due to lack of hardware to test on.
- Fix locking on some Winbond w25q series flashes.
- Fix Auto Address Increment (AAI) writes on SST that flashes that start
on odd address. The write enable latch needs to be set again after the
single byte program.
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Merge tag 'spi-nor/for-7.1' into mtd/next
SPI NOR changes for 7.1
There is only a collection of bugfixes this time around, with no notable
changes to the core. Some of the more noteworthy bugfixes listed below.
- Enable die erase on MT35XU02GCBA. We knew this flash needed this fixup
since 7f77c561e2 ("mtd: spi-nor: micron-st: add TODO for fixing
mt35xu02gcba") but did not add it due to lack of hardware to test on.
- Fix locking on some Winbond w25q series flashes.
- Fix Auto Address Increment (AAI) writes on SST that flashes that start
on odd address. The write enable latch needs to be set again after the
single byte program.
radeon_ring_restore() takes ownership of the data buffer allocated by
radeon_ring_backup(). The caller (radeon_gpu_reset()) only frees it in
the non-restore branch; in the restore branch it relies on
radeon_ring_restore() to free it.
If radeon_ring_lock() fails, the function returned early without calling
kvfree(data), leaking the ring backup buffer on every GPU reset that
fails at the lock stage. During repeated GPU resets this causes
cumulative kernel memory exhaustion.
Free data before returning the error.
Fixes: 55d7c22192 ("drm/radeon: implement ring saving on reset v4")
Signed-off-by: Yuho Choi <dbgh9129@gmail.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
radeon_align_pitch() has the same kind of overflow issue as the old
amdgpu helper: both the alignment round-up add and the final
'aligned * cpp' calculation can overflow signed int.
If that wraps, radeon_mode_dumb_create() can end up returning an
invalid pitch or creating a zero-sized dumb buffer.
Fix this by using check_add_overflow() for the alignment round-up and
check_mul_overflow() for the final pitch calculation, returning 0 on
overflow. Also reject zero pitch and size in
radeon_mode_dumb_create().
Found via AST-based call-graph analysis using sqry.
Fixes: ff72145bad ("drm: dumb scanout create/mmap for intel/radeon (v3)")
Signed-off-by: Werner Kasselman <werner@verivus.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This version brings along the following updates:
- Add allow_clock_gating to dcn42 dccg.
- Bypass post csc for additional color spaces in dcn42.
- Remove unused dml2_project.
- Unset Replay desync error verification by default.
- Align HWSS fast commit path with legacy path.
- Fix implicit narrowing conversion warnings.
- Fix double free.
- Introduce power module on Linux.
- Add power module on Linux.
- Fix fpu guard warning.
- Add Replay/PSR active check in link loss status check.
- Remove SYMCLK F and G values from link encoder and MANUAL_FLOW_CONTROL from optc.
- Add minimum vfp requirement.
- Fix narrowing boundaries and eDP parser assignment.
- Fix dml2_0 narrowing boundaries.
- Add README.md file to DML2_0 repository.
- Fix DPMS using partially updated pipe context.
- Move dml2_destroy to non-FPU compilation unit.
Signed-off-by: Taimur Hassan <Syed.Hassan@amd.com>
Signed-off-by: Chenyu Chen <chen-yu.chen@amd.com>
Acked-by: Tom Chung <ChiaHsuan.Chung@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
[Why & How]
DPMS functions should not use partially updated pipe context passed
as argument of commit_planes_do_stream_update, and instead use the
one in current_state, which is guaranteed to be the most recently
programmed HW config.
Reviewed-by: Wenjing Liu <wenjing.liu@amd.com>
Signed-off-by: Dominik Kaszewski <dominik.kaszewski@amd.com>
Signed-off-by: Chenyu Chen <chen-yu.chen@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
[Why/How]
Add README.md file to repository
Use it to categorize directories for tracking purposes
Reviewed-by: Dillon Varone <dillon.varone@amd.com>
Signed-off-by: Samson Tam <samson.tam@amd.com>
Signed-off-by: Chenyu Chen <chen-yu.chen@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
[Why] drm/amd/display dml2_0 code had implicit narrowing conversions reported by
a warning in timing, watermark, and translation paths.
[How] Apply explicit boundary casts for intentional narrowing, preserve wider
intermediate math, and use wider timing intermediates where required for safe
range handling.
Reviewed-by: Dillon Varone <dillon.varone@amd.com>
Signed-off-by: Gaghik Khachatrian <gaghik.khachatrian@amd.com>
Signed-off-by: Chenyu Chen <chen-yu.chen@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
[Why] drm/amd/display had implicit integer narrowing at protocol/storage boundaries
and an incomplete eDP assignment in integrated info parsing.
[How] Apply explicit boundary casts for intentional narrowing, keep intermediate math
in wider types, and restore explicit eDP field mapping in v2.2 parser.
Reviewed-by: Dillon Varone <dillon.varone@amd.com>
Signed-off-by: Gaghik Khachatrian <gaghik.khachatrian@amd.com>
Signed-off-by: Chenyu Chen <chen-yu.chen@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
[WHY&HOW]
Vertical front porch (vfp) must be greater than 1, and must be patched
if it isn't. This must be done pre-DML so the DLG programming remains
consistent with the OTG programming.
Reviewed-by: Austin Zheng <austin.zheng@amd.com>
Signed-off-by: Dillon Varone <Dillon.Varone@amd.com>
Signed-off-by: Chenyu Chen <chen-yu.chen@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
[WHY]
Definitions were removed by HW from new headers.
Reviewed-by: Charlene Liu <charlene.liu@amd.com>
Signed-off-by: Andrew Lichmanov <Andrew.Lichmanov@amd.com>
Signed-off-by: Chenyu Chen <chen-yu.chen@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
[Why&How]
To avoid unnecessary link retraining when the panel is in Replay/PSR mode,
we need to check if it's in active state and ESD information before we
decide to retrain the link.
Reviewed-by: ChunTao Tso <chuntao.tso@amd.com>
Signed-off-by: Allen Li <allen.li@amd.com>
Signed-off-by: Chenyu Chen <chen-yu.chen@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
[Why & How]
Refactors dm to utilize the power module for managing
replay, PSR, and backlight control functionalities.
Key changes:
- Introduced replay / PSR events to enable / disable replay / PSR.
- Implemented replay rate control and power option
- Refactored backlight control by using the power module.
- Enhanced handling of VRR within replay and PSR logic.
Reviewed-by: Leo Li <sunpeng.li@amd.com>
Signed-off-by: Ray Wu <ray.wu@amd.com>
Signed-off-by: Leo Li <sunpeng.li@amd.com>
Signed-off-by: Chenyu Chen <chen-yu.chen@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
[Why]
Other OS supported by DC uses the power module to manage panel power
features such as backlight and self-refresh. It contains enhancements
on top what amdgpu_dm is doing today that can benefit power.
[How]
Introduce the power module. It's currently not being used anywhere, a
future change will incorporate it into amdgpu_dm.
Reviewed-by: Leo Li <sunpeng.li@amd.com>
Signed-off-by: Ray Wu <ray.wu@amd.com>
Signed-off-by: Leo Li <sunpeng.li@amd.com>
Signed-off-by: Chenyu Chen <chen-yu.chen@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Add missing operations to commit_planes_for_stream_fast and
hwss_build_fast_sequence to match the legacy commit_planes_for_stream
behavior for UPDATE_TYPE_FAST updates.
- Add stream-level fast update flags (cursor_attr, cursor_pos,
periodic_interrupt, info_frame, dmdata, dither) to dc_stream.h
- Add stream-level fields to dc_fast_update struct for fast/full
update classification in populate_fast_updates/fast_updates_exist
- Add HWSS_SETUP_PERIODIC_INTERRUPT block sequence entry, delegating
to dc->hwss.setup_periodic_interrupt instead of calling dcn10
directly
- Add HUBP_ENABLE_3DLUT_FL block for 3DLUT FL with
should_update_pipe_for_stream/plane guards
- Add DPP_SET_CURSOR_MATRIX block with new cursor_csc_change flag
- Widen DPP_PROGRAM_GAMUT_REMAP to also trigger on stream gamut_remap
- Add info frame, dmdata, dither, and cursor blocks to
hwss_build_fast_sequence
- Reclassify cursor_position/cursor_attributes as UPDATE_TYPE_FAST
- Extract dc_dmdata_types.h to resolve circular include between
hw_sequencer.h and dc_stream.h
- Remove dcn10_hwseq.h include from dc_hw_sequencer.c
Reviewed-by: Alvin Lee <alvin.lee2@amd.com>
Signed-off-by: Rafal Ostrowski <rafal.ostrowski@amd.com>
Signed-off-by: Chenyu Chen <chen-yu.chen@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
[Why & How]
There will be an unexpected desync error while doing PSR -> Replay transit,
so we want to disable the replay desync error detection by default.
Reviewed-by: Robin Chen <robin.chen@amd.com>
Signed-off-by: Allen Li <allen.li@amd.com>
Signed-off-by: Chenyu Chen <chen-yu.chen@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
