linux-toradex.git/kernel/power, branch v6.19

Merge branch 'pm-em'

2026-01-16T15:16:24+00:00

Merge fixes related to the energy model management for 6.19-rc6:

 - Fix a memory leak in em_create_pd() error path (Malaya Kumar Rout)

 - Fix stale description of the cost field in struct em_perf_state to
   reflect the current code (Yaxiong Tian)

 - Fix and revamp the energy model YNL specification added recently
   along with the energy model netlink interface (Changwoo Min)

* pm-em:
  PM: EM: Add dump to get-perf-domains in the EM YNL spec
  PM: EM: Change cpus' type from string to u64 array in the EM YNL spec
  PM: EM: Rename em.yaml to dev-energymodel.yaml
  PM: EM: Fix yamllint warnings in the EM YNL spec
  PM: EM: Fix memory leak in em_create_pd() error path
  PM: EM: Fix incorrect description of the cost field in struct em_perf_state

PM: EM: Add dump to get-perf-domains in the EM YNL spec

2026-01-09T20:44:46+00:00

Add dump to get-perf-domains, so that a user can fetch either information
about a specific performance domain with do or information about all
performance domains with dump. Share the reply format of do and dump using
perf-domain-attrs, so remove perf-domains. The YNL spec, autogenerated
files, and the do implementation are updated, and the dump implementation
is added.

Suggested-by: Donald Hunter 
Reviewed-by: Lukasz Luba 
Reviewed-by: Donald Hunter 
Signed-off-by: Changwoo Min 
Link: https://patch.msgid.link/20260108053212.642478-5-changwoo@igalia.com
Signed-off-by: Rafael J. Wysocki

PM: EM: Change cpus' type from string to u64 array in the EM YNL spec

2026-01-09T20:44:46+00:00

Previously, the cpus attribute was a string format which was a "%*pb"
stringification of a bitmap. That is not very consumable for a UAPI,
so let’s change it to an u64 array of CPU ids.

Suggested-by: Donald Hunter 
Reviewed-by: Lukasz Luba 
Reviewed-by: Donald Hunter 
Signed-off-by: Changwoo Min 
Link: https://patch.msgid.link/20260108053212.642478-4-changwoo@igalia.com
Signed-off-by: Rafael J. Wysocki

PM: EM: Rename em.yaml to dev-energymodel.yaml

2026-01-09T20:44:46+00:00

The EM YNL specification used many acronyms, including ‘em’, ‘pd’,
‘ps’, etc. While the acronyms are short and convenient, they could be
confusing. So, let’s spell them out to be more specific. The following
changes were made in the spec. Note that the protocol name cannot exceed
GENL_NAMSIZ (16).

  em           -> dev-energymodel
  pds          -> perf-domains
  pd           -> perf-domain
  pd-id        -> perf-domain-id
  pd-table     -> perf-table
  ps           -> perf-state
  get-pds      -> get-perf-domains
  get-pd-table -> get-perf-table
  pd-created   -> perf-domain-created
  pd-updated   -> perf-domain-updated
  pd-deleted   -> perf-domain-deleted

In addition. doc strings were added to the spec. based on the comments in
energy_model.h. Two flag attributes (perf-state-flags and
perf-domain-flags) were added for easily interpreting the bit flags.

Finally, the autogenerated files and em_netlink.c were updated accordingly
to reflect the name changes.

Suggested-by: Donald Hunter 
Reviewed-by: Lukasz Luba 
Reviewed-by: Donald Hunter 
Signed-off-by: Changwoo Min 
Link: https://patch.msgid.link/20260108053212.642478-3-changwoo@igalia.com
Signed-off-by: Rafael J. Wysocki

PM: EM: Fix memory leak in em_create_pd() error path

2026-01-08T15:55:21+00:00

When ida_alloc() fails in em_create_pd(), the function returns without
freeing the previously allocated 'pd' structure, leading to a memory leak.
The 'pd' pointer is allocated either at line 436 (for CPU devices with
cpumask) or line 442 (for other devices) using kzalloc().

Additionally, the function incorrectly returns -ENOMEM when ida_alloc()
fails, ignoring the actual error code returned by ida_alloc(), which can
fail for reasons other than memory exhaustion.

Fix both issues by:
 1. Freeing the 'pd' structure with kfree() when ida_alloc() fails
 2. Returning the actual error code from ida_alloc() instead of -ENOMEM

This ensures proper cleanup on the error path and accurate error reporting.

Fixes: cbe5aeedecc7 ("PM: EM: Assign a unique ID when creating a performance domain")
Signed-off-by: Malaya Kumar Rout 
Reviewed-by:  Changwoo Min 
Link: https://patch.msgid.link/20260105103730.65626-1-mrout@redhat.com
Signed-off-by: Rafael J. Wysocki

PM: hibernate: Fix crash when freeing invalid crypto compressor

2026-01-05T18:12:56+00:00

When crypto_alloc_acomp() fails, it returns an ERR_PTR value, not NULL.

The cleanup code in save_compressed_image() and load_compressed_image()
unconditionally calls crypto_free_acomp() without checking for ERR_PTR,
which causes crypto_acomp_tfm() to dereference an invalid pointer and
crash the kernel.

This can be triggered when the compression algorithm is unavailable
(e.g., CONFIG_CRYPTO_LZO not enabled).

Fix by adding IS_ERR_OR_NULL() checks before calling crypto_free_acomp()
and acomp_request_free(), similar to the existing kthread_stop() check.

Fixes: b03d542c3c95 ("PM: hibernate: Use crypto_acomp interface")
Signed-off-by: Malaya Kumar Rout 
Cc: 6.15+  # 6.15+
[ rjw: Added 2 empty code lines ]
Link: https://patch.msgid.link/20251230115613.64080-1-mrout@redhat.com
Signed-off-by: Rafael J. Wysocki

PM: sleep: Fix suspend_test() at the TEST_CORE level

2025-12-28T12:01:39+00:00

Commit a10ad1b10402 ("PM: suspend: Make pm_test delay interruptible by
wakeup events") replaced mdelay() in suspend_test() with msleep() which
does not work at the TEST_CORE test level that calls suspend_test()
while running on one CPU with interrupts off.

Address this by making suspend_test() check if the test level is
suitable for using msleep() and use mdelay() otherwise.

Fixes: a10ad1b10402 ("PM: suspend: Make pm_test delay interruptible by wakeup events")
Reported-by: Sebastian Reichel 
Closes: https://lore.kernel.org/linux-pm/aUsAk0k1N9hw8IkY@venus/
Signed-off-by: Rafael J. Wysocki 
Tested-by: Sebastian Reichel 
Link: https://patch.msgid.link/6251576.lOV4Wx5bFT@rafael.j.wysocki

ynl: add regen hint to new headers

2025-12-09T07:52:43+00:00

Recent commit 68e83f347266 ("tools: ynl-gen: add regeneration comment")
added a hint how to regenerate the code to the headers. Update
the new headers from this release cycle to also include it.

Reviewed-by: Simon Horman 
Link: https://patch.msgid.link/20251207004740.1657799-1-kuba@kernel.org
Signed-off-by: Jakub Kicinski

Merge branches 'pm-qos' and 'pm-tools'

2025-11-28T15:50:45+00:00

Merge PM QoS updates and a cpupower utility update for 6.19-rc1:

 - Introduce and document a QoS limit on CPU exit latency during wakeup
   from suspend-to-idle (Ulf Hansson)

 - Add support for building libcpupower statically (Zuo An)

* pm-qos:
  Documentation: power/cpuidle: Document the CPU system wakeup latency QoS
  cpuidle: Respect the CPU system wakeup QoS limit for cpuidle
  sched: idle: Respect the CPU system wakeup QoS limit for s2idle
  pmdomain: Respect the CPU system wakeup QoS limit for cpuidle
  pmdomain: Respect the CPU system wakeup QoS limit for s2idle
  PM: QoS: Introduce a CPU system wakeup QoS limit

* pm-tools:
  tools/power/cpupower: Support building libcpupower statically

Merge branches 'pm-em' and 'pm-opp'

2025-11-28T15:44:00+00:00

Merge energy model management updates and operating performance points
(OPP) library changes for 6.19-rc1:

 - Add support for sending netlink notifications to user space on energy
   model updates (Changwoo Mini, Peng Fan)

 - Minor improvements to the Rust OPP interface (Tamir Duberstein)

 - Fixes to scope-based pointers in the OPP library (Viresh Kumar)

* pm-em:
  PM: EM: Add to em_pd_list only when no failure
  PM: EM: Notify an event when the performance domain changes
  PM: EM: Implement em_notify_pd_created/updated()
  PM: EM: Implement em_notify_pd_deleted()
  PM: EM: Implement em_nl_get_pd_table_doit()
  PM: EM: Implement em_nl_get_pds_doit()
  PM: EM: Add an iterator and accessor for the performance domain
  PM: EM: Add a skeleton code for netlink notification
  PM: EM: Add em.yaml and autogen files
  PM: EM: Expose the ID of a performance domain via debugfs
  PM: EM: Assign a unique ID when creating a performance domain

* pm-opp:
  rust: opp: simplify callers of `to_c_str_array`
  OPP: Initialize scope-based pointers inline
  rust: opp: fix broken rustdoc link