vio(4): use NULL instead of 0 with sc_{rx,tx}_mbuf pointer array.

ok millert@, deraadt@

diff --git a/sys/dev/pv/if_vio.c b/sys/dev/pv/if_vio.c
index 23d91ed..be53cca 100644 (file)
--- a/sys/dev/pv/if_vio.c
+++ b/sys/dev/pv/if_vio.c
@@ -1,4 +1,4 @@
-/*     $OpenBSD: if_vio.c,v 1.21 2022/01/09 05:42:58 jsg Exp $ */
+/*     $OpenBSD: if_vio.c,v 1.22 2022/03/07 18:52:16 dv Exp $  */
 
 /*
  * Copyright (c) 2012 Stefan Fritsch, Alexander Fiveg.
@@ -913,7 +913,7 @@ vio_add_rx_mbuf(struct vio_softc *sc, int i)
            m, BUS_DMA_READ|BUS_DMA_NOWAIT);
        if (r) {
                m_freem(m);
-               sc->sc_rx_mbufs[i] = 0;
+               sc->sc_rx_mbufs[i] = NULL;
                return r;
        }
 
@@ -1146,7 +1146,7 @@ vio_txeof(struct virtqueue *vq)
                    BUS_DMASYNC_POSTWRITE);
                m = sc->sc_tx_mbufs[slot];
                bus_dmamap_unload(vsc->sc_dmat, sc->sc_tx_dmamaps[slot]);
-               sc->sc_tx_mbufs[slot] = 0;
+               sc->sc_tx_mbufs[slot] = NULL;
                virtio_dequeue_commit(vq, slot);
                m_freem(m);
        }