[dpdk-stable] [PATCH v2] net/ice: retry getting VF VSI map after it fails

[dapengx.yu at intel.com]

From: Dapeng Yu <dapengx.yu at intel.com>

The request of getting VF VSI map request may fail when DCF is busy,
this patch adds retry mechanism to make it able to succeed.

Fixes: b09d34ac8584 ("net/ice: fix flow redirector")
Cc: stable at dpdk.org

Signed-off-by: Dapeng Yu <dapengx.yu at intel.com>
---
V2:
* Remove goto 
---
 drivers/net/ice/ice_dcf.c | 17 ++++++++++++++---
 1 file changed, 14 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ice/ice_dcf.c b/drivers/net/ice/ice_dcf.c
index 38e9a84698..c9c01a14e3 100644
--- a/drivers/net/ice/ice_dcf.c
+++ b/drivers/net/ice/ice_dcf.c
@@ -534,15 +534,26 @@ int
 ice_dcf_handle_vsi_update_event(struct ice_dcf_hw *hw)
 {
 	struct rte_pci_device *pci_dev = RTE_ETH_DEV_TO_PCI(hw->eth_dev);
-	int err = 0;
+	int i = 0;
+	int err = -1;
 
 	rte_spinlock_lock(&hw->vc_cmd_send_lock);
 
 	rte_intr_disable(&pci_dev->intr_handle);
 	ice_dcf_disable_irq0(hw);
 
-	if (ice_dcf_get_vf_resource(hw) || ice_dcf_get_vf_vsi_map(hw) < 0)
-		err = -1;
+	for (;;) {
+		if (ice_dcf_get_vf_resource(hw) == 0 &&
+		    ice_dcf_get_vf_vsi_map(hw) >= 0) {
+			err = 0;
+			break;
+		}
+
+		if (++i >= ICE_DCF_ARQ_MAX_RETRIES)
+			break;
+
+		rte_delay_ms(ICE_DCF_ARQ_CHECK_TIME);
+	}
 
 	rte_intr_enable(&pci_dev->intr_handle);
 	ice_dcf_enable_irq0(hw);
-- 
2.27.0