After upgrading to RHEL 7.6, systems with QLogic FC HBA crash on boot, OR LUNs presented to QLogic are only partially discovered or not at all

Issue

• LUNs presented via QLogic HBA gets patially discovered OR does not get discovered at all after upgrading to kernel-3.10.0-957.el7

  • It was noticed that with QLogic QLE2692 - QLogic 16Gb FC Dual-port HBA and with firmware version 8.08.xx LUNs do not get discovered.
  • With QLogic Corp. ISP2722-based 16/32Gb Fibre Channel to PCIe Adapter some of the paths to LUN would be seen missing. This issue might present with other versions of Qlogic HBAs as well.

• System crashes on boot when FC cables are plugged into QLogic FC HBA, but boots ok when FC cables are unplugged from system.

• Below messages are are seen in boot logs.

  Dec 18 09:20:23 <hostname> kernel: scsi host15: qla2xxx
  Dec 18 09:20:23 <hostname> kernel: qla2xxx [0000:2f:00.0]-00fb:15: QLogic QLE2692 - QLogic 16Gb FC Dual-port HBA.
  Dec 18 09:20:23 <hostname> kernel: qla2xxx [0000:2f:00.0]-00fc:15: ISP2261: PCIe (8.0GT/s x8) @ 0000:2f:00.0 hdma+ host#=15  fw=8.08.05 (d0d5).
  . . .
  Dec 18 09:20:24 <hostname> kernel: TECH PREVIEW: NVMe over FC may not be fully supported.
                                                  Please review provided documentation for limitations.
  

• Operating System can't detect new LUNs presented to QLogic HBA when running RHEL 7.6