[dpdk-stable] [PATCH] net/iavf: fix vertor interrupt number configuration error

[Wei Zhao]

There is a issue when iavf do vertor interrupt configuration,
it will miss one interrupt vector which set admin queue interrupt
when communicate with host pf.

Fixes: 69dd4c3d0898 ("net/avf: enable queue and device")
Cc: stable at dpdk.org

Signed-off-by: Wei Zhao <wei.zhao1 at intel.com>
Signed-off-by: Zhao Wei <wei.zhao1 at intel.com>
---
 drivers/net/iavf/iavf_ethdev.c | 4 ++--
 drivers/net/iavf/iavf_vchnl.c  | 8 +++++++-
 2 files changed, 9 insertions(+), 3 deletions(-)

diff --git a/drivers/net/iavf/iavf_ethdev.c b/drivers/net/iavf/iavf_ethdev.c
index 846e604..49c9499 100644
--- a/drivers/net/iavf/iavf_ethdev.c
+++ b/drivers/net/iavf/iavf_ethdev.c
@@ -308,7 +308,7 @@ static int iavf_config_rx_queues_irqs(struct rte_eth_dev *dev,
 	if (!dev->data->dev_conf.intr_conf.rxq ||
 	    !rte_intr_dp_is_en(intr_handle)) {
 		/* Rx interrupt disabled, Map interrupt only for writeback */
-		vf->nb_msix = 1;
+		vf->nb_msix = 2;
 		if (vf->vf_res->vf_cap_flags &
 		    VIRTCHNL_VF_OFFLOAD_WB_ON_ITR) {
 			/* If WB_ON_ITR supports, enable it */
@@ -338,7 +338,7 @@ static int iavf_config_rx_queues_irqs(struct rte_eth_dev *dev,
 			vf->rxq_map[vf->msix_base] |= 1 << i;
 	} else {
 		if (!rte_intr_allow_others(intr_handle)) {
-			vf->nb_msix = 1;
+			vf->nb_msix = 2;
 			vf->msix_base = IAVF_MISC_VEC_ID;
 			for (i = 0; i < dev->data->nb_rx_queues; i++) {
 				vf->rxq_map[vf->msix_base] |= 1 << i;
diff --git a/drivers/net/iavf/iavf_vchnl.c b/drivers/net/iavf/iavf_vchnl.c
index 6381fb6..d9a376e 100644
--- a/drivers/net/iavf/iavf_vchnl.c
+++ b/drivers/net/iavf/iavf_vchnl.c
@@ -609,7 +609,7 @@ iavf_config_irq_map(struct iavf_adapter *adapter)
 		return -ENOMEM;
 
 	map_info->num_vectors = vf->nb_msix;
-	for (i = 0; i < vf->nb_msix; i++) {
+	for (i = 0; i < vf->nb_msix - 1; i++) {
 		vecmap = &map_info->vecmap[i];
 		vecmap->vsi_id = vf->vsi_res->vsi_id;
 		vecmap->rxitr_idx = IAVF_ITR_INDEX_DEFAULT;
@@ -618,6 +618,12 @@ iavf_config_irq_map(struct iavf_adapter *adapter)
 		vecmap->rxq_map = vf->rxq_map[vf->msix_base + i];
 	}
 
+	vecmap = &map_info->vecmap[i];
+	vecmap->vsi_id = vf->vsi_res->vsi_id;
+	vecmap->vector_id = 0;
+	vecmap->txq_map = 0;
+	vecmap->rxq_map = 0;
+
 	args.ops = VIRTCHNL_OP_CONFIG_IRQ_MAP;
 	args.in_args = (u8 *)map_info;
 	args.in_args_size = len;
-- 
2.7.5