i40e: Add condition to enter fdir flush and reinit

When FD_SB/ATR are not enabled, do not allow flow director flush
and reinit.

Change-ID: Iafe261c1862992981615815551abd1ed9fada0a8
Signed-off-by: Akeem G Abodunrin <akeem.g.abodunrin@intel.com>
Signed-off-by: Patrick Lu <patrick.lu@intel.com>
Tested-by: <jamesx.m.young@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

drivers/net/ethernet/intel/i40e/i40e_main.c

@@ -5211,6 +5211,9 @@ static void i40e_fdir_flush_and_replay(struct i40e_pf *pf)
 	int flush_wait_retry = 50;
 	int reg;
 
+	if (!(pf->flags & (I40E_FLAG_FD_SB_ENABLED | I40E_FLAG_FD_ATR_ENABLED)))
+		return;
+
 	if (time_after(jiffies, pf->fd_flush_timestamp +
 				(I40E_MIN_FD_FLUSH_INTERVAL * HZ))) {
 		set_bit(__I40E_FD_FLUSH_REQUESTED, &pf->state);
@@ -5272,6 +5275,9 @@ static void i40e_fdir_reinit_subtask(struct i40e_pf *pf)
 	if (test_bit(__I40E_DOWN, &pf->state))
 		return;
 
+	if (!(pf->flags & (I40E_FLAG_FD_SB_ENABLED | I40E_FLAG_FD_ATR_ENABLED)))
+		return;
+
 	if ((pf->fd_add_err >= I40E_MAX_FD_PROGRAM_ERROR) &&
 	    (i40e_get_current_atr_cnt(pf) >= pf->fd_atr_cnt) &&
 	    (i40e_get_current_atr_cnt(pf) > pf->fdir_pf_filter_count))