[dpdk-stable] [PATCH v2] net/i40e: fix flow FDIR enable issue

[Wei Zhao <wei.zhao1@intel.com>]

When we flush flow FDIR, all queues are disabled for FDIR.
If FDIR rule is created again, then the flow list is empty,
as it is the first time to create rule after flush fdir filter,
so we need to enable FDIR for all queues. And also, disable FDIR
for queues should be done in function i40e_flow_flush_fdir_filter().

Fixes: 1491f63c7559 ("net/i40e: fix flush of flow director filter")
Fixes: 6ae9b2b5e8c2 ("net/i40e: cache flow director enable value in Rx queue")
Cc: stable@dpdk.org

Signed-off-by: Wei Zhao <wei.zhao1@intel.com>

---

v2:
update log info
---
 drivers/net/i40e/i40e_flow.c | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/drivers/net/i40e/i40e_flow.c b/drivers/net/i40e/i40e_flow.c
index 25c77e7aa..8f8df6fae 100644
--- a/drivers/net/i40e/i40e_flow.c
+++ b/drivers/net/i40e/i40e_flow.c
@@ -3462,6 +3462,10 @@ i40e_flow_parse_fdir_filter(struct rte_eth_dev *dev,
 		}
 	}
 
+	/* If create the first fdir rule, enable fdir check for rx queues */
+	if (TAILQ_EMPTY(&pf->fdir.fdir_list))
+		i40e_fdir_rx_proc_enable(dev, 1);
+
 	return 0;
 err:
 	i40e_fdir_teardown(pf);
@@ -5330,9 +5334,6 @@ i40e_flow_flush(struct rte_eth_dev *dev, struct rte_flow_error *error)
 		return -rte_errno;
 	}
 
-	/* Disable FDIR processing as all FDIR rules are now flushed */
-	i40e_fdir_rx_proc_enable(dev, 0);
-
 	return ret;
 }
 
@@ -5368,6 +5369,9 @@ i40e_flow_flush_fdir_filter(struct i40e_pf *pf)
 		for (pctype = I40E_FILTER_PCTYPE_NONF_IPV4_UDP;
 		     pctype <= I40E_FILTER_PCTYPE_L2_PAYLOAD; pctype++)
 			pf->fdir.inset_flag[pctype] = 0;
+
+		/* Disable FDIR processing as all FDIR rules are now flushed */
+		i40e_fdir_rx_proc_enable(dev, 0);
 	}
 
 	return ret;
-- 
2.19.1