nfp: xsk: fix memory leak in nfp_net_alloc()

In nfp_net_alloc(), the memory allocated for xsk_pools is not freed in
the subsequent error paths, leading to a memory leak. Fix that by
freeing it in the error path.

Fixes: 6402528 ("nfp: xsk: add AF_XDP zero-copy Rx and Tx support")
Signed-off-by: Abdun Nihaal <nihaal@cse.iitm.ac.in>
Signed-off-by: NipaLocal <nipa@local>

Author: Abdun Nihaal

drivers/net/ethernet/netronome/nfp/nfp_net_common.c

@@ -2557,14 +2557,16 @@ nfp_net_alloc(struct pci_dev *pdev, const struct nfp_dev_info *dev_info,
 	err = nfp_net_tlv_caps_parse(&nn->pdev->dev, nn->dp.ctrl_bar,
 				     &nn->tlv_caps);
 	if (err)
-		goto err_free_nn;
+		goto err_free_xsk_pools;
 
 	err = nfp_ccm_mbox_alloc(nn);
 	if (err)
-		goto err_free_nn;
+		goto err_free_xsk_pools;
 
 	return nn;
 
+err_free_xsk_pools:
+	kfree(nn->dp.xsk_pools);
 err_free_nn:
 	if (nn->dp.netdev)
 		free_netdev(nn->dp.netdev);