Comment 0 for bug 1901968

Brief Description
-----------------
SR-IOV driver disappeared from the definition making 0 FEC devices allocatable for Kubernetes

1> created 8 VFs on FEC device with igb_uio driver
2> displayed the device info for FEC device (0d8f)
driver igb_uio
sriov_vf_driver igb_uio
3> checked the resource of FEC device from k8s
Allocatable:
intel.com/intel_fpga_fec: 8
4> check drivers (lspci) on host.
b6:01.0 Processing accelerators: Intel Corporation Device 0d90 (rev 01)
Subsystem: Intel Corporation Device e001
Kernel driver in use: igb_uio
5> after waiting for certain time, repeat the step <2> :
sriov_vf_driver is None;
driver igb_uio
sriov_vf_driver None
6> system lock and unlock the host
7> checked the resource of FEC device from k8s
Allocatable:
intel.com/intel_fpga_fec: 0

Severity
--------
Medium - severity is high when the issue occurs, but it's very intermittent

Steps to Reproduce
------------------
See above

Expected Behavior
------------------
SRIOV is configured properly after unlock

Actual Behavior
----------------
SRIOV VF driver definition is missing after unlock

Reproducibility
---------------
Intermittent; frequency is unknown

System Configuration
--------------------
Seen on AIO-SX

Branch/Pull Time/Commit
-----------------------
stx.4.0

Last Pass
---------
N/A - Issue is intermittent

Timestamp/Logs
--------------

Test Activity
-------------
System Testing

Workaround
----------
Describe workaround if available