acpica: Add a thread safe acpi_get_name
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Authored by andrew on Mon, Oct 12, 4:11 PM.

Details

Reviewers

olce
jhb
markj
obiwac

Group Reviewers

arm64

Summary

The current acpi_name uses a static buffer to store the node name. This
is unsafe when two threads call this as the second will trash the
value of the first.

Add a version where the caller passes in the buffer and length so they
are safe from other threads.

Diff Detail

Repository

rG FreeBSD src repository

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Unit

Tests Skipped

Build Status

Buildable 78073
Build 74956: arc lint + arc unit

Event Timeline

andrew created this revision.Mon, Oct 12, 4:11 PM

Herald added a reviewer: olce. · View Herald TranscriptMon, Oct 12, 4:11 PM

Herald added a subscriber: imp. · View Herald Transcript

andrew requested review of this revision.Mon, Oct 12, 4:11 PM

Harbormaster completed remote builds in B78073: Diff 189620.Mon, Oct 12, 4:11 PM

andrew added a parent revision: D60654: arm64/acpica: Support the SMMUv3 IORT table v5.Mon, Oct 12, 4:11 PM

andrew added a child revision: D60656: dpaa2: Pass the APCI name to acpi_iort_map_named_msi.

andrew added reviewers: jhb, markj, obiwac.Mon, Oct 12, 4:14 PM

obiwac added inline comments.Mon, Oct 12, 6:02 PM

sys/dev/acpica/acpi.c
4330–4333	maybe update this comment to point to `acpi_get_name()` instead
4356–4358	I know our acpi code is currently a little inconsistent regarding this, but I do think i'd prefer if this returned -1 on failure and 0 on success