X-Git-Url: https://gerrit.fd.io/r/gitweb?p=csit.git;a=blobdiff_plain;f=resources%2Flibraries%2Fpython%2FInterfaceUtil.py;fp=resources%2Flibraries%2Fpython%2FInterfaceUtil.py;h=4cd7cf10b69b0d925c2030ed5e9daa982d6fb43d;hp=af34c6450110a2d408cddaa405e8c29af144dc41;hb=7d849ba64e10b8a7678845ee1dcc091e125dd124;hpb=324f01417f17a5347c102179f3d2277a77b116ce

diff --git a/resources/libraries/python/InterfaceUtil.py b/resources/libraries/python/InterfaceUtil.py
index af34c64501..4cd7cf10b6 100644
--- a/resources/libraries/python/InterfaceUtil.py
+++ b/resources/libraries/python/InterfaceUtil.py
@@ -1828,8 +1828,9 @@ class InterfaceUtil:
             # PCI device must be re-bound to kernel driver before creating VFs.
             DUTSetup.verify_kernel_module(node, kernel_driver, force_load=True)
             # Stop VPP to prevent deadlock.
-            # Unbind from current driver.
-            DUTSetup.pci_driver_unbind(node, pf_pci_addr)
+            # Unbind from current driver if bound.
+            if current_driver:
+                DUTSetup.pci_driver_unbind(node, pf_pci_addr)
             # Bind to kernel driver.
             DUTSetup.pci_driver_bind(node, pf_pci_addr, kernel_driver)