[dpdk-dev] [PATCH] net/i40e: add warning log for VF multi-queue Rx interrupt

[Lunyuan Cui]

Count of queues per port is over the max usable vector,
it will cause missing packets. This patch is in order to
add suggestive logs.

Signed-off-by: Lunyuan Cui <lunyuanx.cui at intel.com>
---
 drivers/net/i40e/i40e_ethdev_vf.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/net/i40e/i40e_ethdev_vf.c b/drivers/net/i40e/i40e_ethdev_vf.c
index 479f8282c..68a0cb8fa 100644
--- a/drivers/net/i40e/i40e_ethdev_vf.c
+++ b/drivers/net/i40e/i40e_ethdev_vf.c
@@ -682,8 +682,12 @@ 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 >= nb_msix) {
+			PMD_DRV_LOG(WARNING, "Count of queues per port is "
+				"over the max usable vector(%d), it will "
+				"cause missing packets.", nb_msix - 1);
 			vector_id = I40E_RX_VEC_START;
+		}
 	}
 
 	args.ops = VIRTCHNL_OP_CONFIG_IRQ_MAP;
-- 
2.17.1