5.1.2 FCoE boot fails on HPE servers with HPE FlexFabric adapters

This issue is due to a known limitation that the bnx2x and bnx2fc drivers have with the Option Card Black Box - Active Health (OCBB) feature when input–output memory management unit (IOMMU) is enabled. The issue occurs because the network adapter firmware attempts to access a memory area that is not assigned network devices when bringing the interface up/down or when loading/unloading the driver. When this issue occurs, you must reboot the system.

As a workaround, you must specify intel_iommu=off in the kernel boot parameters.

(Bug ID 30102871)