[FCoE] Boot from SAN system fails to boot after kernel update

Issue

• System unable to find fcoe SAN boot disk and not booting with new kernel.

• The system is configured to boot from SAN disks via Broadcom internal FCoE CNA cards, but after kernel update system fails to boot and shows following error messages on console:

  dracut Warning: LVM vg_root/lv_root not found
  dracut Warning: LVM vg_root/lv_swap not found
  
  dracut Warning: Boot has failed. To debug this issue add "rdshell" to the kernel command line.
  
  dracut Warning: Signal caught!
  dracut Warning: LVM vg_root/lv_root not found
  dracut Warning: LVM vg_root/lv_swap not found
  
  dracut Warning: Boot has failed. To debug this issue add "rdshell" to the kernel command line.
  Kernel panic - not syncing: Attempted to kill init!
  Pid: 1, comm: init Not tainted 2.6.32-504.12.2.el6.x86_64 #1
  Call Trace:
    [<ffffffff8152933c>] ? panic+0xa7/0x16f
    [<ffffffff8107a5f2>] ? do_exit+0x862/0x870
    [<ffffffff8118fa25>] ? fput+0x25/0x30
    [<ffffffff8107a658>] ? do_group_exit+0x58/0xd0
    [<ffffffff8107a6e7>] ? sys_exit_group+0x17/0x20
    [<ffffffff8100b072>] ? system_call_fastpath+0x16/0x1b