diff --git a/hw/usb/hcd-xhci.c b/hw/usb/hcd-xhci.c
index 4f0bbb72fc..835f65ed81 100644
--- a/hw/usb/hcd-xhci.c
+++ b/hw/usb/hcd-xhci.c
@@ -346,7 +346,6 @@ typedef struct XHCITransfer {
     QEMUSGList sgl;
     bool running_async;
     bool running_retry;
-    bool cancelled;
     bool complete;
     bool int_req;
     unsigned int iso_pkts;
@@ -374,7 +373,6 @@ struct XHCIStreamContext {
     dma_addr_t pctx;
     unsigned int sct;
     XHCIRing ring;
-    XHCIStreamContext *sstreams;
 };
 
 struct XHCIEPContext {
@@ -506,6 +504,7 @@ static void xhci_kick_ep(XHCIState *xhci, unsigned int slotid,
                          unsigned int epid, unsigned int streamid);
 static TRBCCode xhci_disable_ep(XHCIState *xhci, unsigned int slotid,
                                 unsigned int epid);
+static void xhci_xfer_report(XHCITransfer *xfer);
 static void xhci_event(XHCIState *xhci, XHCIEvent *event, int v);
 static void xhci_write_event(XHCIState *xhci, XHCIEvent *event, int v);
 static USBEndpoint *xhci_epid_to_usbep(XHCIState *xhci,
@@ -1132,7 +1131,6 @@ static void xhci_reset_streams(XHCIEPContext *epctx)
 
     for (i = 0; i < epctx->nr_pstreams; i++) {
         epctx->pstreams[i].sct = -1;
-        g_free(epctx->pstreams[i].sstreams);
     }
 }
 
@@ -1145,15 +1143,8 @@ static void xhci_alloc_streams(XHCIEPContext *epctx, dma_addr_t base)
 
 static void xhci_free_streams(XHCIEPContext *epctx)
 {
-    int i;
-
     assert(epctx->pstreams != NULL);
 
-    if (!epctx->lsa) {
-        for (i = 0; i < epctx->nr_pstreams; i++) {
-            g_free(epctx->pstreams[i].sstreams);
-        }
-    }
     g_free(epctx->pstreams);
     epctx->pstreams = NULL;
     epctx->nr_pstreams = 0;
@@ -1195,6 +1186,7 @@ static XHCIStreamContext *xhci_find_stream(XHCIEPContext *epctx,
 static void xhci_set_ep_state(XHCIState *xhci, XHCIEPContext *epctx,
                               XHCIStreamContext *sctx, uint32_t state)
 {
+    XHCIRing *ring = NULL;
     uint32_t ctx[5];
     uint32_t ctx2[2];
 
@@ -1205,6 +1197,7 @@ static void xhci_set_ep_state(XHCIState *xhci, XHCIEPContext *epctx,
     /* update ring dequeue ptr */
     if (epctx->nr_pstreams) {
         if (sctx != NULL) {
+            ring = &sctx->ring;
             xhci_dma_read_u32s(xhci, sctx->pctx, ctx2, sizeof(ctx2));
             ctx2[0] &= 0xe;
             ctx2[0] |= sctx->ring.dequeue | sctx->ring.ccs;
@@ -1212,8 +1205,12 @@ static void xhci_set_ep_state(XHCIState *xhci, XHCIEPContext *epctx,
             xhci_dma_write_u32s(xhci, sctx->pctx, ctx2, sizeof(ctx2));
         }
     } else {
-        ctx[2] = epctx->ring.dequeue | epctx->ring.ccs;
-        ctx[3] = (epctx->ring.dequeue >> 16) >> 16;
+        ring = &epctx->ring;
+    }
+    if (ring) {
+        ctx[2] = ring->dequeue | ring->ccs;
+        ctx[3] = (ring->dequeue >> 16) >> 16;
+
         DPRINTF("xhci: set epctx: " DMA_ADDR_FMT " state=%d dequeue=%08x%08x\n",
                 epctx->pctx, state, ctx[3], ctx[2]);
     }
@@ -1311,15 +1308,18 @@ static TRBCCode xhci_enable_ep(XHCIState *xhci, unsigned int slotid,
     return CC_SUCCESS;
 }
 
-static int xhci_ep_nuke_one_xfer(XHCITransfer *t)
+static int xhci_ep_nuke_one_xfer(XHCITransfer *t, TRBCCode report)
 {
     int killed = 0;
 
+    if (report && (t->running_async || t->running_retry)) {
+        t->status = report;
+        xhci_xfer_report(t);
+    }
+
     if (t->running_async) {
         usb_cancel_packet(&t->packet);
         t->running_async = 0;
-        t->cancelled = 1;
-        DPRINTF("xhci: cancelling transfer, waiting for it to complete\n");
         killed = 1;
     }
     if (t->running_retry) {
@@ -1329,6 +1329,7 @@ static int xhci_ep_nuke_one_xfer(XHCITransfer *t)
             timer_del(epctx->kick_timer);
         }
         t->running_retry = 0;
+        killed = 1;
     }
     if (t->trbs) {
         g_free(t->trbs);
@@ -1341,7 +1342,7 @@ static int xhci_ep_nuke_one_xfer(XHCITransfer *t)
 }
 
 static int xhci_ep_nuke_xfers(XHCIState *xhci, unsigned int slotid,
-                               unsigned int epid)
+                               unsigned int epid, TRBCCode report)
 {
     XHCISlot *slot;
     XHCIEPContext *epctx;
@@ -1362,7 +1363,10 @@ static int xhci_ep_nuke_xfers(XHCIState *xhci, unsigned int slotid,
 
     xferi = epctx->next_xfer;
     for (i = 0; i < TD_QUEUE; i++) {
-        killed += xhci_ep_nuke_one_xfer(&epctx->transfers[xferi]);
+        killed += xhci_ep_nuke_one_xfer(&epctx->transfers[xferi], report);
+        if (killed) {
+            report = 0; /* Only report once */
+        }
         epctx->transfers[xferi].packet.ep = NULL;
         xferi = (xferi + 1) % TD_QUEUE;
     }
@@ -1392,7 +1396,7 @@ static TRBCCode xhci_disable_ep(XHCIState *xhci, unsigned int slotid,
         return CC_SUCCESS;
     }
 
-    xhci_ep_nuke_xfers(xhci, slotid, epid);
+    xhci_ep_nuke_xfers(xhci, slotid, epid, 0);
 
     epctx = slot->eps[epid-1];
 
@@ -1434,7 +1438,7 @@ static TRBCCode xhci_stop_ep(XHCIState *xhci, unsigned int slotid,
         return CC_EP_NOT_ENABLED_ERROR;
     }
 
-    if (xhci_ep_nuke_xfers(xhci, slotid, epid) > 0) {
+    if (xhci_ep_nuke_xfers(xhci, slotid, epid, CC_STOPPED) > 0) {
         fprintf(stderr, "xhci: FIXME: endpoint stopped w/ xfers running, "
                 "data might be lost\n");
     }
@@ -1479,7 +1483,7 @@ static TRBCCode xhci_reset_ep(XHCIState *xhci, unsigned int slotid,
         return CC_CONTEXT_STATE_ERROR;
     }
 
-    if (xhci_ep_nuke_xfers(xhci, slotid, epid) > 0) {
+    if (xhci_ep_nuke_xfers(xhci, slotid, epid, 0) > 0) {
         fprintf(stderr, "xhci: FIXME: endpoint reset w/ xfers running, "
                 "data might be lost\n");
     }
@@ -1736,14 +1740,12 @@ static int xhci_complete_packet(XHCITransfer *xfer)
         xfer->running_async = 1;
         xfer->running_retry = 0;
         xfer->complete = 0;
-        xfer->cancelled = 0;
         return 0;
     } else if (xfer->packet.status == USB_RET_NAK) {
         trace_usb_xhci_xfer_nak(xfer);
         xfer->running_async = 0;
         xfer->running_retry = 1;
         xfer->complete = 0;
-        xfer->cancelled = 0;
         return 0;
     } else {
         xfer->running_async = 0;
@@ -2474,7 +2476,7 @@ static void xhci_detach_slot(XHCIState *xhci, USBPort *uport)
 
     for (ep = 0; ep < 31; ep++) {
         if (xhci->slots[slot].eps[ep]) {
-            xhci_ep_nuke_xfers(xhci, slot+1, ep+1);
+            xhci_ep_nuke_xfers(xhci, slot + 1, ep + 1, 0);
         }
     }
     xhci->slots[slot].uport = NULL;
@@ -3289,7 +3291,7 @@ static void xhci_complete(USBPort *port, USBPacket *packet)
     XHCITransfer *xfer = container_of(packet, XHCITransfer, packet);
 
     if (packet->status == USB_RET_REMOVE_FROM_QUEUE) {
-        xhci_ep_nuke_one_xfer(xfer);
+        xhci_ep_nuke_one_xfer(xfer, 0);
         return;
     }
     xhci_complete_packet(xfer);
diff --git a/hw/usb/host-libusb.c b/hw/usb/host-libusb.c
index 128955dd92..fd320cd8aa 100644
--- a/hw/usb/host-libusb.c
+++ b/hw/usb/host-libusb.c
@@ -137,6 +137,7 @@ static QTAILQ_HEAD(, USBHostDevice) hostdevs =
 static void usb_host_auto_check(void *unused);
 static void usb_host_release_interfaces(USBHostDevice *s);
 static void usb_host_nodev(USBHostDevice *s);
+static void usb_host_detach_kernel(USBHostDevice *s);
 static void usb_host_attach_kernel(USBHostDevice *s);
 
 /* ------------------------------------------------------------------------ */
@@ -787,10 +788,13 @@ static int usb_host_open(USBHostDevice *s, libusb_device *dev)
         goto fail;
     }
 
-    libusb_get_device_descriptor(dev, &s->ddesc);
     s->dev     = dev;
     s->bus_num = bus_num;
     s->addr    = addr;
+
+    usb_host_detach_kernel(s);
+
+    libusb_get_device_descriptor(dev, &s->ddesc);
     usb_host_get_port(s->dev, s->port, sizeof(s->port));
 
     usb_ep_init(udev);
@@ -992,15 +996,14 @@ static int usb_host_claim_interfaces(USBHostDevice *s, int configuration)
     udev->ninterfaces   = 0;
     udev->configuration = 0;
 
-    if (configuration == 0) {
-        /* address state - ignore */
-        return USB_RET_SUCCESS;
-    }
-
     usb_host_detach_kernel(s);
 
     rc = libusb_get_active_config_descriptor(s->dev, &conf);
     if (rc != 0) {
+        if (rc == LIBUSB_ERROR_NOT_FOUND) {
+            /* address state - ignore */
+            return USB_RET_SUCCESS;
+        }
         return USB_RET_STALL;
     }
 
@@ -1052,7 +1055,6 @@ static void usb_host_set_config(USBHostDevice *s, int config, USBPacket *p)
     trace_usb_host_set_config(s->bus_num, s->addr, config);
 
     usb_host_release_interfaces(s);
-    usb_host_detach_kernel(s);
     rc = libusb_set_configuration(s->dh, config);
     if (rc != 0) {
         usb_host_libusb_error("libusb_set_configuration", rc);
@@ -1256,16 +1258,14 @@ static void usb_host_flush_ep_queue(USBDevice *dev, USBEndpoint *ep)
 static void usb_host_handle_reset(USBDevice *udev)
 {
     USBHostDevice *s = USB_HOST_DEVICE(udev);
+    int rc;
 
     trace_usb_host_reset(s->bus_num, s->addr);
 
-    if (udev->configuration == 0) {
-        return;
+    rc = libusb_reset_device(s->dh);
+    if (rc != 0) {
+        usb_host_nodev(s);
     }
-    usb_host_release_interfaces(s);
-    libusb_reset_device(s->dh);
-    usb_host_claim_interfaces(s, 0);
-    usb_host_ep_update(s);
 }
 
 /*