/sys/bus/pci/devices/<B:D:F:>/rescan file missing on Ubuntu Kernel 5.4.14.050414-generic

Question

On my ubuntu I am missing rescan files under /sys/bus/pci/devices/<B:D:F:>/ Does anyone know how to restore them? Can I simply copy them from /sys/bus/pci/rescan ?

1. Ubuntu : 16.04.6 LTS
2. Kernel: 5.4.14.050414-generic
3. NVMe driver version: 1.0

Answer 1

In Kernel 5.4 and later:

• rescan in /sys/.../<domain:bus:dev.fn>/ was renamed dev_rescan (for PCI devices)
• rescan in /sys/.../pci_bus/<domain:bus>/ was renamed bus_rescan

This caused application breakage and there is a proposed patch to revert the behaviour