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Differential D56718

fix(acpi_panasonic): acquire serial lock before calling hkey_sound_mute in shutdown
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Authored by seuros on Apr 29 2026, 9:59 PM.
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ngie
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rG7619d14d08a0: acpi_panasonic: acquire serial lock before calling hkey_sound_mute in shutdown
Summary

acpi_panasonic_shutdown() calls hkey_sound_mute() without holding the ACPI serial lock.
Every other call site holds ACPI_SERIAL_BEGIN(panasonic) before calling it, as the locking model is caller-owned.

This seems to affect the whole Panasonic Toughtbook lineup btw.

Test Plan

Boot a Panasonic Notebook with acpi_panasonic loaded. Trigger a clean shutdown and reboot, verify no static audio burst through the speaker.

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rG FreeBSD src repository
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Event Timeline

seuros created this revision.Apr 29 2026, 9:59 PM
seuros held this revision as a draft.
Herald added a subscriber: imp. · View Herald TranscriptApr 29 2026, 9:59 PM
Harbormaster completed remote builds in B72643: Diff 176827.Apr 29 2026, 9:59 PM
seuros published this revision for review.Apr 29 2026, 10:48 PM
seuros edited the summary of this revision. (Show Details)
seuros edited the test plan for this revision. (Show Details)
seuros added a reviewer: imp.
seuros added a reviewer: ngie.Apr 30 2026, 10:50 PM
ngie accepted this revision.May 5 2026, 7:47 PM

hkey_sound_mute calls ACPI_SERIAL_ASSERT(..), which I assume is where things panic. This is a pretty straightforward change.

This revision is now accepted and ready to land.May 5 2026, 7:47 PM
Closed by commit rG7619d14d08a0: acpi_panasonic: acquire serial lock before calling hkey_sound_mute in shutdown (authored by seuros, committed by ngie). · Explain WhyMay 5 2026, 7:52 PM
This revision was automatically updated to reflect the committed changes.
ngie added a commit: rG7619d14d08a0: acpi_panasonic: acquire serial lock before calling hkey_sound_mute in shutdown.

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sys/
dev/
acpi_support/
2 lines

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sys/dev/acpi_support/acpi_panasonic.c

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