[dpdk-dev] [PATCH 3/5] net/i40e: fix dereference before NULL check in mbuf release

[Bruce Richardson]

Coverity flags that the txq variable is used before it's checked for NULL.

Coverity issue: 195023

Fixes: 24853544c84c ("net/i40e: fix mbuf free in vector Tx")
Cc: qi.z.zh...@intel.com
CC: sta...@dpdk.org

Signed-off-by: Bruce Richardson <bruce.richard...@intel.com>
---
 drivers/net/i40e/i40e_rxtx.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/i40e/i40e_rxtx.c b/drivers/net/i40e/i40e_rxtx.c
index 8f727fae6..5ce85eb52 100644
--- a/drivers/net/i40e/i40e_rxtx.c
+++ b/drivers/net/i40e/i40e_rxtx.c
@@ -2423,13 +2423,13 @@ i40e_tx_queue_release_mbufs(struct i40e_tx_queue *txq)
        struct rte_eth_dev *dev;
        uint16_t i;
 
-       dev = &rte_eth_devices[txq->port_id];
-
        if (!txq || !txq->sw_ring) {
                PMD_DRV_LOG(DEBUG, "Pointer to rxq or sw_ring is NULL");
                return;
        }
 
+       dev = &rte_eth_devices[txq->port_id];
+
        /**
         *  vPMD tx will not set sw_ring's mbuf to NULL after free,
         *  so need to free remains more carefully.
-- 
2.20.1