In some specific cases it might also be necessary to manually remove Onload driver modules before upgrading to a more recent version. To do this, list the modules and remove each dependency before removing the modules:
# lsmod | grep onload
onload 929792 4
sfc_char 102400 1 onload
sfc_resource 294912 2 onload,sfc_char
and:
# lsmod | grep sfc
sfc_char 102400 1 onload
sfc_resource 294912 2 onload,sfc_char
sfc 540672 0
mtd 69632 13 sfc
To remove modules:
# rmmod onload
# rmmod sfc_char
Repeat the rmmod command for each module.