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Val Packett d4f1a76a2e udev: rules: order ID_BUS assignment by specificity / bus nesting depth
Only PCI was treated as a "less specific" bus that should not be
assigned if USB was already assigned, so non-PCI USB controllers
(under platform/DT or ACPI) would have all their devices *not*
treated as USB at all, resulting in external peripherals being
treated as internal ones on DT platforms.

Clarify these assignments into specificity/nesting groups instead
of having some arbitrary "X must be before Y" comments.

Fixes a4381cae8b.
2026-09-21 23:46:17 +09:00
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Files in this directory contain configuration for systemd-udevd.service, a
daemon that manages symlinks to device nodes, permissions of devices nodes,
emits device events for userspace, and renames network interfaces.

See man:udev(7) for an overview of the configuration file format, and
man:systemd-udevd.service(8) for a description of service itself.

Use 'systemd-analyze cat-config udev/rules.d' to display the effective config.