[dpdk-dev] [PATCH] net/i40e: fix param check to avoid division by 0

[Yong Wang]

In function i40e_vsi_config_tc_queue_mapping(), if 'enabled_tcmap' is
0, 'total_tc' might be 0. Then 'total_tc' might be used in a division
by 0 in "qpnum_per_tc = i40e_align_floor(vsi->nb_qps / total_tc)". Fix
it by adding a check to parameter 'enabled_tcmap'.

Signed-off-by: Yong Wang <wang.yong19 at zte.com.cn>
---
 drivers/net/i40e/i40e_ethdev.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/net/i40e/i40e_ethdev.c b/drivers/net/i40e/i40e_ethdev.c
index c18a93b..d41b213 100644
--- a/drivers/net/i40e/i40e_ethdev.c
+++ b/drivers/net/i40e/i40e_ethdev.c
@@ -4257,6 +4257,11 @@ enum i40e_status_code
 	int i, total_tc = 0;
 	uint16_t qpnum_per_tc, bsf, qp_idx;
 
+	if (enabled_tcmap == 0) {
+		PMD_DRV_LOG(ERR, "Error! enabled tcmap shouldn't be 0");
+		return I40E_ERR_PARAM;
+	}
+
 	ret = validate_tcmap_parameter(vsi, enabled_tcmap);
 	if (ret != I40E_SUCCESS)
 		return ret;
-- 
1.8.3.1