[dpdk-dev] [PATCH] net/ice: check Rx queue number on RSS init

[dapengx.yu at intel.com]

From: YU DAPENG <dapengx.yu at intel.com>

When RSS is initialized, rx queues number is used as denominator to set
default value into the RSS lookup table. If it is zero, there will be
error of being divided by 0. So add value check to avoid the error.

Fixes: 50370662b727 ("net/ice: support device and queue ops")
Cc: stable at dpdk.org

Signed-off-by: YU DAPENG <dapengx.yu at intel.com>
---
 drivers/net/ice/ice_ethdev.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/net/ice/ice_ethdev.c b/drivers/net/ice/ice_ethdev.c
index 9a5d6a559..bbb8c1460 100644
--- a/drivers/net/ice/ice_ethdev.c
+++ b/drivers/net/ice/ice_ethdev.c
@@ -3182,6 +3182,12 @@ static int ice_init_rss(struct ice_pf *pf)
 	vsi->rss_key_size = ICE_AQC_GET_SET_RSS_KEY_DATA_RSS_KEY_SIZE;
 	vsi->rss_lut_size = pf->hash_lut_size;
 
+	if (nb_q == 0) {
+		PMD_DRV_LOG(WARNING,
+			"RSS is not supported as rx queues number is zero\n");
+		return 0;
+	}
+
 	if (is_safe_mode) {
 		PMD_DRV_LOG(WARNING, "RSS is not supported in safe mode\n");
 		return 0;
-- 
2.27.0