[dpdk-dev] [PATCH v4] net/i40e: fix multi-queue Rx interrupt for VF

[Lunyuan Cui]

The interrupt vector which bind to queues should not larger than
the max avaiable vertor. It will cause port start failed. This patch
changed the judgement condition of the limited vector id. It can
effectively avoid vector id out of range.

Fixes: 5b8d2d89dd99 (net/i40e: enable multi-queue Rx interrupt for VF)

Signed-off-by: Lunyuan Cui <lunyuanx.cui at intel.com>
---
v4:
- Change commit message

v3:
- Change commit message

v2:
- Change commit message
---
 drivers/net/i40e/i40e_ethdev_vf.c | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

diff --git a/drivers/net/i40e/i40e_ethdev_vf.c b/drivers/net/i40e/i40e_ethdev_vf.c
index 479f8282c..d514e8991 100644
--- a/drivers/net/i40e/i40e_ethdev_vf.c
+++ b/drivers/net/i40e/i40e_ethdev_vf.c
@@ -657,7 +657,6 @@ i40evf_config_irq_map(struct rte_eth_dev *dev)
 	struct rte_intr_handle *intr_handle = &pci_dev->intr_handle;
 	uint32_t vector_id;
 	int i, err;
-	uint16_t nb_msix;
 
 	if (dev->data->dev_conf.intr_conf.rxq != 0 &&
 	    rte_intr_allow_others(intr_handle))
@@ -665,9 +664,6 @@ i40evf_config_irq_map(struct rte_eth_dev *dev)
 	else
 		vector_id = I40E_MISC_VEC_ID;
 
-	nb_msix = RTE_MIN(vf->vf_res->max_vectors,
-			intr_handle->nb_efd);
-
 	map_info = (struct virtchnl_irq_map_info *)cmd_buffer;
 	map_info->num_vectors = dev->data->nb_rx_queues;
 	for (i = 0; i < dev->data->nb_rx_queues; i++) {
@@ -682,7 +678,7 @@ i40evf_config_irq_map(struct rte_eth_dev *dev)
 			intr_handle->intr_vec[i] = vector_id;
 		if (vector_id > I40E_MISC_VEC_ID)
 			vector_id++;
-		if (vector_id > nb_msix)
+		if (vector_id >= vf->vf_res->max_vectors)
 			vector_id = I40E_RX_VEC_START;
 	}
 
-- 
2.17.1