[PATCH net] ixgbe: add NULL pointer check before calling xdp_rxq_info_reg

[wangyunjian]

From: Yunjian Wang <wangyunj...@huawei.com>

The rx_ring->q_vector could be NULL, so it need to be checked before
calling xdp_rxq_info_reg.

Fixes: b02e5a0ebb172 ("xsk: Propagate napi_id to XDP socket Rx path")
Addresses-Coverity: ("Dereference after null check")
Signed-off-by: Yunjian Wang <wangyunj...@huawei.com>
---
 drivers/net/ethernet/intel/ixgbe/ixgbe_main.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c 
b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
index 6cbbe09ce8a0..7b76b3f448f7 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
@@ -6586,8 +6586,9 @@ int ixgbe_setup_rx_resources(struct ixgbe_adapter 
*adapter,
        rx_ring->next_to_use = 0;
 
        /* XDP RX-queue info */
-       if (xdp_rxq_info_reg(&rx_ring->xdp_rxq, adapter->netdev,
-                            rx_ring->queue_index, 
rx_ring->q_vector->napi.napi_id) < 0)
+       if (rx_ring->q_vector && xdp_rxq_info_reg(&rx_ring->xdp_rxq, 
adapter->netdev,
+                                                 rx_ring->queue_index,
+                                                 
rx_ring->q_vector->napi.napi_id) < 0)
                goto err;
 
        rx_ring->xdp_prog = adapter->xdp_prog;
-- 
2.23.0