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    Subject[PATCH AUTOSEL 4.9 16/64] i40e: Prevent deleting MAC address from VF when set by PF
    Date
    From: Patryk Małek <patryk.malek@intel.com>

    [ Upstream commit 5907cf6c5bbe78be2ed18b875b316c6028b20634 ]

    To prevent VF from deleting MAC address that was assigned by the
    PF we need to check for that scenario when we try to delete a MAC
    address from a VF.

    Signed-off-by: Patryk Małek <patryk.malek@intel.com>
    Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
    Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
    Signed-off-by: Sasha Levin <sashal@kernel.org>
    ---
    drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c | 10 ++++++++++
    1 file changed, 10 insertions(+)

    diff --git a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
    index 54b8ee2583f14..7484ad3c955db 100644
    --- a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
    +++ b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
    @@ -2000,6 +2000,16 @@ static int i40e_vc_del_mac_addr_msg(struct i40e_vf *vf, u8 *msg, u16 msglen)
    ret = I40E_ERR_INVALID_MAC_ADDR;
    goto error_param;
    }
    +
    + if (vf->pf_set_mac &&
    + ether_addr_equal(al->list[i].addr,
    + vf->default_lan_addr.addr)) {
    + dev_err(&pf->pdev->dev,
    + "MAC addr %pM has been set by PF, cannot delete it for VF %d, reset VF to change MAC addr\n",
    + vf->default_lan_addr.addr, vf->vf_id);
    + ret = I40E_ERR_PARAM;
    + goto error_param;
    + }
    }
    vsi = pf->vsi[vf->lan_vsi_idx];

    --
    2.20.1
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