bhyve: missing mutex initializations

Explicitly initialize the mutex that a PCI virtio module passes back to
virtio.

It so happens that these mutexes were being initialized regardless, no
functional change intended.

Reviewed by:    chuck, jhb
Differential Revision:  https://reviews.freebsd.org/D34372

usr.sbin/bhyve/pci_nvme.c

@@ -485,7 +485,7 @@ pci_nvme_init_queues(struct pci_nvme_softc *sc, uint32_t nsq, uint32_t ncq)
 	} else {
 		struct nvme_submission_queue *sq = sc->submit_queues;
 
-		for (i = 0; i < sc->num_squeues; i++)
+		for (i = 0; i < sc->num_squeues + 1; i++)
 			pthread_mutex_init(&sq[i].mtx, NULL);
 	}
 
@@ -508,7 +508,7 @@ pci_nvme_init_queues(struct pci_nvme_softc *sc, uint32_t nsq, uint32_t ncq)
 	} else {
 		struct nvme_completion_queue *cq = sc->compl_queues;
 
-		for (i = 0; i < sc->num_cqueues; i++)
+		for (i = 0; i < sc->num_cqueues + 1; i++)
 			pthread_mutex_init(&cq[i].mtx, NULL);
 	}
 }

usr.sbin/bhyve/pci_virtio_console.c

@@ -698,6 +698,8 @@ pci_vtcon_init(struct vmctx *ctx, struct pci_devinst *pi, nvlist_t *nvl)
 	sc->vsc_config->cols = 80;
 	sc->vsc_config->rows = 25;
 
+	pthread_mutex_init(&sc->vsc_mtx, NULL);
+
 	vi_softc_linkup(&sc->vsc_vs, &vtcon_vi_consts, sc, pi, sc->vsc_queues);
 	sc->vsc_vs.vs_mtx = &sc->vsc_mtx;
 

usr.sbin/bhyve/pci_virtio_rnd.c

@@ -179,6 +179,8 @@ pci_vtrnd_init(struct vmctx *ctx, struct pci_devinst *pi, nvlist_t *nvl)
 
 	sc = calloc(1, sizeof(struct pci_vtrnd_softc));
 
+	pthread_mutex_init(&sc->vrsc_mtx, NULL);
+
 	vi_softc_linkup(&sc->vrsc_vs, &vtrnd_vi_consts, sc, pi, &sc->vrsc_vq);
 	sc->vrsc_vs.vs_mtx = &sc->vrsc_mtx;
 

usr.sbin/bhyve/pci_virtio_scsi.c

@@ -700,6 +700,8 @@ pci_vtscsi_init(struct vmctx *ctx, struct pci_devinst *pi, nvlist_t *nvl)
 		return (1);
 	}
 
+	pthread_mutex_init(&sc->vss_mtx, NULL);
+
 	vi_softc_linkup(&sc->vss_vs, &vtscsi_vi_consts, sc, pi, sc->vss_vq);
 	sc->vss_vs.vs_mtx = &sc->vss_mtx;