i40e: fix a bug in debugfs with add/del macaddr

The new code flow requires us to grab the filter list lock before
adding/deleting the filter.

Change-ID: I4eaef508ab4da2d1b2e23f20f2a78d931d5b6aeb
Signed-off-by: Anjali Singhai Jain <anjali.singhai@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

diff --git a/drivers/net/ethernet/intel/i40e/i40e_debugfs.c b/drivers/net/ethernet/intel/i40e/i40e_debugfs.c
index d15bd62..d4b7af9 100644 (file)
--- a/drivers/net/ethernet/intel/i40e/i40e_debugfs.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_debugfs.c
@@ -1137,7 +1137,9 @@ static ssize_t i40e_dbg_command_write(struct file *filp,
                        goto command_write_done;
                }
 
+               spin_lock_bh(&vsi->mac_filter_list_lock);
                f = i40e_add_filter(vsi, ma, vlan, false, false);
+               spin_unlock_bh(&vsi->mac_filter_list_lock);
                ret = i40e_sync_vsi_filters(vsi, true);
                if (f && !ret)
                        dev_info(&pf->pdev->dev,
@@ -1174,7 +1176,9 @@ static ssize_t i40e_dbg_command_write(struct file *filp,
                        goto command_write_done;
                }
 
+               spin_lock_bh(&vsi->mac_filter_list_lock);
                i40e_del_filter(vsi, ma, vlan, false, false);
+               spin_unlock_bh(&vsi->mac_filter_list_lock);
                ret = i40e_sync_vsi_filters(vsi, true);
                if (!ret)
                        dev_info(&pf->pdev->dev,