hwmon: (pmbus) Fix passing events to regulator core

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Sashiko reports:

Commit 754bd2b4a0 ("hwmon: (pmbus/core) Protect regulator operations with
mutex") introduced a worker to batch regulator events over time using
atomic_or(). The delayed worker then passes the combined bitmask unmodified
to regulator_notifier_call_chain().

The core regulator subsystem's regulator_handle_critical() function
evaluates the event parameter using a strict switch statement. If
multiple distinct faults occur before the worker runs (e.g.,
REGULATOR_EVENT_UNDER_VOLTAGE | REGULATOR_EVENT_OVER_CURRENT), the combined
bitmask fails to match any case. This leaves the reason as NULL and
completely bypasses the critical hw_protection_trigger().

Fix the problem by passing events bit by bit to the regulator event
handler.

Reported-by: Sashiko <sashiko-bot@kernel.org>
Fixes: 754bd2b4a0 ("hwmon: (pmbus/core) Protect regulator operations with mutex")
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

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This commit is contained in:

Guenter Roeck 2026-06-29 16:08:00 -07:00

parent 72a6910103

commit 9ef7dacd44

1 changed files with 9 additions and 4 deletions

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drivers/hwmon/pmbus/pmbus_core.c

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