net/bnxt: fix null termination of Rx mbuf chain

[ upstream commit c711cc2 ]

The last mbuf in a multi-segment packet needs to be
NULL-terminated.

Fixes: 0958d8b ("net/bnxt: support LRO")

Signed-off-by: Lance Richardson <lance.richardson@broadcom.com>
Reviewed-by: Somnath Kotur <somnath.kotur@broadcom.com>
Reviewed-by: Ajit Khaparde <ajit.khaparde@broadcom.com>

drivers/net/bnxt/bnxt_rxr.c

@@ -267,6 +267,7 @@ static int bnxt_rx_pages(struct bnxt_rx_queue *rxq,
 		 */
 		rte_bitmap_set(rxr->ag_bitmap, ag_cons);
 	}
+	last->next = NULL;
 	bnxt_prod_ag_mbuf(rxq);
 	return 0;
 }