[dpdk-dev] [PATCH 1/2] net/i40e: fix binding interrupt without msix vectors

[Jiang Mao]

The value of vsi->nb_msix shouldn`t be zero, otherwise, all of
interrupts will be bind to vector 0.

Fixes: 4861cde461 (i40e: new poll mode driver)
Cc: sta...@dpdk.org
Signed-off-by: Jiang Mao <maox.ji...@intel.com>
---
 drivers/net/i40e/i40e_ethdev.c | 31 +++++++++++++++++++++++--------
 drivers/net/i40e/i40e_ethdev.h |  2 +-
 2 files changed, 24 insertions(+), 9 deletions(-)

diff --git a/drivers/net/i40e/i40e_ethdev.c b/drivers/net/i40e/i40e_ethdev.c
index 777e149..16fcb8d 100644
--- a/drivers/net/i40e/i40e_ethdev.c
+++ b/drivers/net/i40e/i40e_ethdev.c
@@ -2001,7 +2001,7 @@ void i40e_flex_payload_reg_set_default(struct i40e_hw *hw)
        I40E_WRITE_FLUSH(hw);
 }
 
-void
+int
 i40e_vsi_queues_bind_intr(struct i40e_vsi *vsi, uint16_t itr_idx)
 {
        struct rte_eth_dev *dev = vsi->adapter->eth_dev;
@@ -2021,10 +2021,14 @@ void i40e_flex_payload_reg_set_default(struct i40e_hw 
*hw)
 
        /* VF bind interrupt */
        if (vsi->type == I40E_VSI_SRIOV) {
+               if (vsi->nb_msix == 0) {
+                       PMD_DRV_LOG(ERR, "No msix resource");
+                       return -EINVAL;
+               }
                __vsi_queues_bind_intr(vsi, msix_vect,
                                       vsi->base_queue, vsi->nb_qps,
                                       itr_idx);
-               return;
+               return 0;
        }
 
        /* PF & VMDq bind interrupt */
@@ -2041,7 +2045,10 @@ void i40e_flex_payload_reg_set_default(struct i40e_hw 
*hw)
        }
 
        for (i = 0; i < vsi->nb_used_qps; i++) {
-               if (nb_msix <= 1) {
+               if (vsi->nb_msix == 0) {
+                       PMD_DRV_LOG(ERR, "No msix resource");
+                       return -EINVAL;
+               } else if (nb_msix <= 1) {
                        if (!rte_intr_allow_others(intr_handle))
                                /* allow to share MISC_VEC_ID */
                                msix_vect = I40E_MISC_VEC_ID;
@@ -2066,6 +2073,8 @@ void i40e_flex_payload_reg_set_default(struct i40e_hw *hw)
                msix_vect++;
                nb_msix--;
        }
+
+       return 0;
 }
 
 static void
@@ -2306,21 +2315,27 @@ void i40e_flex_payload_reg_set_default(struct i40e_hw 
*hw)
        /* Map queues with MSIX interrupt */
        main_vsi->nb_used_qps = dev->data->nb_rx_queues -
                pf->nb_cfg_vmdq_vsi * RTE_LIBRTE_I40E_QUEUE_NUM_PER_VM;
-       i40e_vsi_queues_bind_intr(main_vsi, I40E_ITR_INDEX_DEFAULT);
+       ret = i40e_vsi_queues_bind_intr(main_vsi, I40E_ITR_INDEX_DEFAULT);
+       if (ret < 0)
+               return ret;
        i40e_vsi_enable_queues_intr(main_vsi);
 
        /* Map VMDQ VSI queues with MSIX interrupt */
        for (i = 0; i < pf->nb_cfg_vmdq_vsi; i++) {
                pf->vmdq[i].vsi->nb_used_qps = RTE_LIBRTE_I40E_QUEUE_NUM_PER_VM;
-               i40e_vsi_queues_bind_intr(pf->vmdq[i].vsi,
-                                         I40E_ITR_INDEX_DEFAULT);
+               ret = i40e_vsi_queues_bind_intr(pf->vmdq[i].vsi,
+                                               I40E_ITR_INDEX_DEFAULT);
+               if (ret < 0)
+                       return ret;
                i40e_vsi_enable_queues_intr(pf->vmdq[i].vsi);
        }
 
        /* enable FDIR MSIX interrupt */
        if (pf->fdir.fdir_vsi) {
-               i40e_vsi_queues_bind_intr(pf->fdir.fdir_vsi,
-                                         I40E_ITR_INDEX_NONE);
+               ret = i40e_vsi_queues_bind_intr(pf->fdir.fdir_vsi,
+                                               I40E_ITR_INDEX_NONE);
+               if (ret < 0)
+                       return ret;
                i40e_vsi_enable_queues_intr(pf->fdir.fdir_vsi);
        }
 
diff --git a/drivers/net/i40e/i40e_ethdev.h b/drivers/net/i40e/i40e_ethdev.h
index e5d0ce5..33fbe77 100644
--- a/drivers/net/i40e/i40e_ethdev.h
+++ b/drivers/net/i40e/i40e_ethdev.h
@@ -1248,7 +1248,7 @@ struct i40e_vsi *i40e_vsi_setup(struct i40e_pf *pf,
 void i40e_pf_disable_irq0(struct i40e_hw *hw);
 void i40e_pf_enable_irq0(struct i40e_hw *hw);
 int i40e_dev_link_update(struct rte_eth_dev *dev, int wait_to_complete);
-void i40e_vsi_queues_bind_intr(struct i40e_vsi *vsi, uint16_t itr_idx);
+int i40e_vsi_queues_bind_intr(struct i40e_vsi *vsi, uint16_t itr_idx);
 void i40e_vsi_queues_unbind_intr(struct i40e_vsi *vsi);
 int i40e_vsi_vlan_pvid_set(struct i40e_vsi *vsi,
                           struct i40e_vsi_vlan_pvid_info *info);
-- 
1.8.3.1