A PCI serial port card does not work after update to Red Hat Enterprise Linux 8.4

Solution In Progress - Updated -


  • A PCI serial adapter does not work after a kernel update to version 4.18.0-305
  • The same device works with previous versions of the kernel


  • Red Hat Enterprise Linux 8.4
  • PCI serial adapter (observed with a device based on Oxford 952 chipset, other devices may be also impacted)

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