Index: sys/dev/bxe/bxe.c
===================================================================
--- sys/dev/bxe/bxe.c
+++ sys/dev/bxe/bxe.c
@@ -6549,9 +6549,11 @@
         if (fp->tx_br != NULL) {
             struct mbuf *m;
             /* just in case bxe_mq_flush() wasn't called */
+            BXE_FP_TX_LOCK(fp);
             while ((m = buf_ring_dequeue_sc(fp->tx_br)) != NULL) {
                 m_freem(m);
             }
+            BXE_FP_TX_UNLOCK(fp);
             buf_ring_free(fp->tx_br, M_DEVBUF);
             fp->tx_br = NULL;
         }