-----Original Message-----
From: dev <redacted> On Behalf Of dapengx.yu@intel.com
Sent: Wednesday, December 30, 2020 2:54 PM
To: Wu, Jingjing <redacted>; Xing, Beilei <redacted>
Cc: dev@dpdk.org; Yu, DapengX <redacted>; stable@dpdk.org
Subject: [dpdk-dev] [PATCH] net/iavf: fix vector id assignment

From: YU DAPENG <redacted>

When the interrupt handle instance allows none packet I/O interrupts, the max
value of vector_id is set to be less than the number of msix interrupts, but not
equal to it. Which may cause same vector_id is sent to PF with opcode
VIRTCHNL_OP_CONFIG_IRQ_MAP to setup the cause of interrupt mapping in
iavf_config_irq_map(), these are invalid parameters, cause error:
VIRTCHNL_STATUS_ERR_PARAM(-5). So add code to set the max value of
vector_id to be equal to the number of msix interrupts.

Fixes: d6bde6b5eae9 ("net/avf: enable Rx interrupt")
Cc: stable@dpdk.org

Signed-off-by: YU DAPENG <redacted>
---
 drivers/net/iavf/iavf_ethdev.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/iavf/iavf_ethdev.c b/drivers/net/iavf/iavf_ethdev.c index

7e3c26a94..54ea3a36c 100644

--- a/drivers/net/iavf/iavf_ethdev.c
+++ b/drivers/net/iavf/iavf_ethdev.c

@@ -578,7 +578,7 @@ static int iavf_config_rx_queues_irqs(struct rte_eth_dev

*dev,
 				qv_map[i].queue_id = i;
 				qv_map[i].vector_id = vec;
 				intr_handle->intr_vec[i] = vec++;
-				if (vec >= vf->nb_msix)
+				if (vec > vf->nb_msix)