The Handle::Config read handler never returned 0, so fs::read /
read_to_end on /scheme/pci/<addr>/config streamed dwords forever —
any unbounded read of a config file hung. Found by the initfs
driver-manager hang: propose_msix_vectors' unbounded config read never
terminated, stalling the oneshot initfs service and the whole boot.
- cfg_access: Pcie::has_ecam() reports ECAM availability.
- scheme: config_space_size() = 4096 with ECAM, 256 in PCI 3.0
fallback; the read handler returns Ok(0) at the boundary and fstat
advertises the correct size.
Red Bear OS
92bf05c20a