igb: Fix NULL pointer dereference in ethtool loopback test

The igb driver currently causes a NULL pointer dereference when executing
the ethtool loopback test. This occurs because there is no associated
q_vector for the test ring when it is set up, as interrupts are typically
not added to the test rings.

Since commit 5ef44b3cb43b removed the napi_id assignment in
__xdp_rxq_info_reg(), there is no longer a need to pass a napi_id to it.
Therefore, simply use 0 as the last parameter.

Fixes: 2c6196013f84 ("igb: Add AF_XDP zero-copy Rx support")
Reviewed-by: Aleksandr Loktionov <aleksandr.loktionov@intel.com>
Reviewed-by: Joe Damato <joe@dama.to>
Signed-off-by: Tianyu Xu <tianyxu@cisco.com>
Reviewed-by: Paul Menzel <pmenzel@molgen.mpg.de>
Tested-by: Rinitha S <sx.rinitha@intel.com> (A Contingent worker at Intel)
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>

diff --git a/drivers/net/ethernet/intel/igb/igb_main.c b/drivers/net/ethernet/intel/igb/igb_main.c
index a9a7a94ae61e93aa737b0103e00580e73601d62b..453deb6d14b31286a0153a64de0ec9b746f63b3a 100644 (file)
--- a/drivers/net/ethernet/intel/igb/igb_main.c
+++ b/drivers/net/ethernet/intel/igb/igb_main.c
@@ -4453,8 +4453,7 @@ int igb_setup_rx_resources(struct igb_ring *rx_ring)
        if (xdp_rxq_info_is_reg(&rx_ring->xdp_rxq))
                xdp_rxq_info_unreg(&rx_ring->xdp_rxq);
        res = xdp_rxq_info_reg(&rx_ring->xdp_rxq, rx_ring->netdev,
-                              rx_ring->queue_index,
-                              rx_ring->q_vector->napi.napi_id);
+                              rx_ring->queue_index, 0);
        if (res < 0) {
                dev_err(dev, "Failed to register xdp_rxq index %u\n",
                        rx_ring->queue_index);