vio: Fix allocation sizes

For both rx and tx, we need an array of bus_dmamap_t and mbuf pointers each.
This results in a size of

  (rxqsize + txqsize) * (sizeof(bus_dmamap_t) + sizeof(struct mbuf *))

The factor 2 before the sizeof(bus_dmamap_t) was too much and we
allocated more than we needed.

OK bluhm@

diff --git a/sys/dev/pv/if_vio.c b/sys/dev/pv/if_vio.c
index ffc98ff..470331d 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 1.50 2024/08/27 19:11:20 sf Exp $  */
+/*     $OpenBSD: if_vio.c,v 1.51 2024/08/28 12:40:22 sf Exp $  */
 
 /*
  * Copyright (c) 2012 Stefan Fritsch, Alexander Fiveg.
@@ -465,14 +465,14 @@ vio_alloc_mem(struct vio_softc *sc)
        }
 
        sc->sc_arrays = mallocarray(rxqsize + txqsize,
-           2 * sizeof(bus_dmamap_t) + sizeof(struct mbuf *), M_DEVBUF,
+           sizeof(bus_dmamap_t) + sizeof(struct mbuf *), M_DEVBUF,
            M_WAITOK | M_CANFAIL | M_ZERO);
        if (sc->sc_arrays == NULL) {
                printf("unable to allocate mem for dmamaps\n");
                goto err_hdr;
        }
        allocsize = (rxqsize + txqsize) *
-           (2 * sizeof(bus_dmamap_t) + sizeof(struct mbuf *));
+           (sizeof(bus_dmamap_t) + sizeof(struct mbuf *));
 
        sc->sc_tx_dmamaps = sc->sc_arrays + rxqsize;
        sc->sc_rx_mbufs = (void*) (sc->sc_tx_dmamaps + txqsize);