igb: Fix removal of unicast MAC filters of VFs
Move checking condition of VF MAC filter before clearing or adding MAC filter to VF to prevent potential blackout caused by removal of necessary and working VF's MAC filter. Fixes: 1b8b062a ("igb: add VF trust infrastructure") Signed-off-by: NKaren Sornek <karen.sornek@intel.com> Tested-by: NKonrad Jankowski <konrad0.jankowski@intel.com> Signed-off-by: NTony Nguyen <anthony.l.nguyen@intel.com>
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