net/hns3: fix key length when configuring RSS

When users set the length of RSS hash key greater than the supported
length by hardware, the driver should intercept and can not configure
the wrong key into the hardware.

Fixes: c37ca66f2b27 ("net/hns3: support RSS")
Cc: stable@dpdk.org
Signed-off-by: Lijun Ou <oulijun@huawei.com>
Signed-off-by: Wei Hu (Xavier) <xavier.huwei@huawei.com>

diff --git a/drivers/net/hns3/hns3_flow.c b/drivers/net/hns3/hns3_flow.c
index aef301a8a7ad25a2d8fe03b26dd785692f86d836..c7851b235c7717b5df07785cb0cd525c652aa039 100644 (file)
--- a/drivers/net/hns3/hns3_flow.c
+++ b/drivers/net/hns3/hns3_flow.c
@@ -1475,6 +1475,14 @@ hns3_config_rss_filter(struct rte_eth_dev *dev,
                return -EINVAL;
        }
 
+       if (rss_flow_conf.key_len &&
+           rss_flow_conf.key_len > RTE_DIM(rss_info->key)) {
+               hns3_err(hw,
+                       "input hash key(%u) greater than supported len(%zu)",
+                       rss_flow_conf.key_len, RTE_DIM(rss_info->key));
+               return -EINVAL;
+       }
+
        /* Filter the unsupported flow types */
        flow_types = rss_flow_conf.types & HNS3_ETH_RSS_SUPPORT;
        if (flow_types != rss_flow_conf.types)