linux-stable.git/drivers/opp/of.c, branch linux-rolling-lts

OPP: of: Fix potential memory leak in opp_parse_supplies()

2026-07-18T14:53:20+00:00

commit 69f888381d2ecbe18ed9f112c096f8fd3623db98 upstream.

The memory allocated for microvolt, microamp and microwatt is not freed
in one of the paths in opp_parse_supplies() which returns directly.
Fix that by adding a goto to the error unwind ladder.

Fixes: 2eedf62e66c2 ("OPP: decouple dt properties in opp_parse_supplies()")
Cc: stable@vger.kernel.org
Signed-off-by: Abdun Nihaal 
Signed-off-by: Viresh Kumar 
Signed-off-by: Greg Kroah-Hartman

OPP: Use mutex locking guards

2025-05-02T05:25:52+00:00

Use mutex locking guard in the OPP core.

No intentional functional impact.

Signed-off-by: Viresh Kumar

OPP: Define and use scope-based cleanup helpers

2025-05-02T05:25:40+00:00

Define and use scope-based cleanup helpers for `struct opp` and `struct
opp_table`.

No intentional functional impact.

Signed-off-by: Viresh Kumar

OPP: Use scope-based OF cleanup helpers

2025-04-24T10:35:59+00:00

Use the OF scope-based cleanup helpers for the OPP core.

No intentional functional impact.

Signed-off-by: Viresh Kumar

OPP: Return opp_table from dev_pm_opp_get_opp_table_ref()

2025-04-24T10:35:56+00:00

For convenience of users, return back the pointer to the opp_table from
dev_pm_opp_get_opp_table_ref(), so they can do:

	opp_table = dev_pm_opp_get_opp_table_ref(tmp_table);

No intentional functional impact.

Signed-off-by: Viresh Kumar

OPP: Remove _get_opp_table_kref()

2025-04-24T10:35:33+00:00

Use dev_pm_opp_get_opp_table_ref() directly instead.

No intentional functional impact.

Signed-off-by: Viresh Kumar

OPP: OF: Fix an OF node leak in _opp_add_static_v2()

2025-01-07T06:07:52+00:00

_opp_add_static_v2() leaks the obtained OF node reference when
_of_opp_alloc_required_opps() fails. Add an of_node_put() call in the
error path.

Fixes: 3466ea2cd6b6 ("OPP: Don't drop opp->np reference while it is still in use")
Signed-off-by: Joe Hattori 
Signed-off-by: Viresh Kumar

OPP: Drop redundant code in _link_required_opps()

2024-10-10T12:15:54+00:00

Due to that the required-devs for the required OPPs are now always being
assigned, we no longer need the special treatment in _link_required_opps()
for the single PM domain case. Let's therefore drop it.

Acked-by: Viresh Kumar 
Signed-off-by: Ulf Hansson 
Link: https://lore.kernel.org/r/20241002122232.194245-8-ulf.hansson@linaro.org

OPP: Introduce an OF helper function to inform if required-opps is used

2024-06-26T05:47:20+00:00

As being shown from a subsequent change to genpd, it's useful to understand
if a device's OF node has an OPP-table described and whether it contains
OPP nodes that makes use of the required-opps DT property.

For this reason, let's introduce an OPP OF helper function called
dev_pm_opp_of_has_required_opp().

Signed-off-by: Ulf Hansson 
Signed-off-by: Viresh Kumar

OPP: OF: Export dev_opp_pm_calc_power() for usage from EM

2024-04-08T14:05:14+00:00

There are device drivers which can modify voltage values for OPPs. It
could be due to the chip binning and those drivers have specific chip
knowledge about it. This adjustment can happen after Energy Model is
registered, thus EM can have stale data about power.

Export dev_opp_pm_calc_power() which can be used by Energy Model to
calculate new power with the new voltage for OPPs.

Acked-by: Viresh Kumar 
Reviewed-by: Dietmar Eggemann 
Signed-off-by: Lukasz Luba 
Signed-off-by: Rafael J. Wysocki