igb: refactor XDP registration

On changing the RX ring parameters igb uses a hack to avoid a warning
when calling xdp_rxq_info_reg via igb_setup_rx_resources.  It just
clears the struct xdp_rxq_info content.

Instead, change this to unregister if we're already registered.  Align
code to the igc code.

Fixes: 9cbc948b5a20c ("igb: add XDP support")
Signed-off-by: Corinna Vinschen <vinschen@redhat.com>
Acked-by: Vinicius Costa Gomes <vinicius.gomes@intel.com>
Tested-by: Sandeep Penigalapati <sandeep.penigalapati@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>

diff --git a/drivers/net/ethernet/intel/igb/igb_ethtool.c b/drivers/net/ethernet/intel/igb/igb_ethtool.c
index 51a2dca..2a57820 100644 (file)
--- a/drivers/net/ethernet/intel/igb/igb_ethtool.c
+++ b/drivers/net/ethernet/intel/igb/igb_ethtool.c
@@ -965,10 +965,6 @@ static int igb_set_ringparam(struct net_device *netdev,
                        memcpy(&temp_ring[i], adapter->rx_ring[i],
                               sizeof(struct igb_ring));
 
-                       /* Clear copied XDP RX-queue info */
-                       memset(&temp_ring[i].xdp_rxq, 0,
-                              sizeof(temp_ring[i].xdp_rxq));
-
                        temp_ring[i].count = new_rx_count;
                        err = igb_setup_rx_resources(&temp_ring[i]);
                        if (err) {

diff --git a/drivers/net/ethernet/intel/igb/igb_main.c b/drivers/net/ethernet/intel/igb/igb_main.c
index bfa321e..34b33b2 100644 (file)
--- a/drivers/net/ethernet/intel/igb/igb_main.c
+++ b/drivers/net/ethernet/intel/igb/igb_main.c
@@ -4345,7 +4345,18 @@ int igb_setup_rx_resources(struct igb_ring *rx_ring)
 {
        struct igb_adapter *adapter = netdev_priv(rx_ring->netdev);
        struct device *dev = rx_ring->dev;
-       int size;
+       int size, res;
+
+       /* XDP RX-queue info */
+       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, 0);
+       if (res < 0) {
+               dev_err(dev, "Failed to register xdp_rxq index %u\n",
+                       rx_ring->queue_index);
+               return res;
+       }
 
        size = sizeof(struct igb_rx_buffer) * rx_ring->count;
 
@@ -4368,14 +4379,10 @@ int igb_setup_rx_resources(struct igb_ring *rx_ring)
 
        rx_ring->xdp_prog = adapter->xdp_prog;
 
-       /* XDP RX-queue info */
-       if (xdp_rxq_info_reg(&rx_ring->xdp_rxq, rx_ring->netdev,
-                            rx_ring->queue_index, 0) < 0)
-               goto err;
-
        return 0;
 
 err:
+       xdp_rxq_info_unreg(&rx_ring->xdp_rxq);
        vfree(rx_ring->rx_buffer_info);
        rx_ring->rx_buffer_info = NULL;
        dev_err(dev, "Unable to allocate memory for the Rx descriptor ring\n");