net/ipn3ke: fix accessing variable before null check

Check input argument "rte_eth_dev *ethdev", to be sure variable is not
NULL before operating on it.

Coverity issue: 337922
Fixes: 70d6b7f550f4 ("net/ipn3ke: add representor")
Cc: stable@dpdk.org
Signed-off-by: Andy Pei <andy.pei@intel.com>
Acked-by: Rosen Xu <rosen.xu@intel.com>

diff --git a/drivers/net/ipn3ke/ipn3ke_representor.c b/drivers/net/ipn3ke/ipn3ke_representor.c
index f4529f6..01ad92e 100644 (file)
--- a/drivers/net/ipn3ke/ipn3ke_representor.c
+++ b/drivers/net/ipn3ke/ipn3ke_representor.c
@@ -736,13 +736,16 @@ ipn3ke_afu_filter_ctrl(struct rte_eth_dev *ethdev,
        enum rte_filter_type filter_type, enum rte_filter_op filter_op,
        void *arg)
 {
-       struct ipn3ke_hw *hw = IPN3KE_DEV_PRIVATE_TO_HW(ethdev);
-       struct ipn3ke_rpst *rpst = IPN3KE_DEV_PRIVATE_TO_RPST(ethdev);
        int ret = 0;
+       struct ipn3ke_hw *hw;
+       struct ipn3ke_rpst *rpst;
 
        if (ethdev == NULL)
                return -EINVAL;
 
+       hw = IPN3KE_DEV_PRIVATE_TO_HW(ethdev);
+       rpst = IPN3KE_DEV_PRIVATE_TO_RPST(ethdev);
+
        if (hw->acc_flow)
                switch (filter_type) {
                case RTE_ETH_FILTER_GENERIC: