net/ice: retry getting VF VSI map after failure

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@dpdk.org
Signed-off-by: Dapeng Yu <dapengx.yu@intel.com>
Acked-by: Haiyue Wang <haiyue.wang@intel.com>

diff --git a/drivers/net/ice/ice_dcf.c b/drivers/net/ice/ice_dcf.c
index 38e9a84..c9c01a1 100644 (file)
--- 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);