1 files changed, 58 insertions, 50 deletions

diff --git a/hw/virtio/virtio.c b/hw/virtio/virtio.c
index 480c2e5..2e98cec 100644
--- a/hw/virtio/virtio.c
+++ b/hw/virtio/virtio.c
@@ -2221,12 +2221,12 @@ int virtio_set_status(VirtIODevice *vdev, uint8_t val)
 {
     VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev);
     trace_virtio_set_status(vdev, val);
+    int ret = 0;
 
     if (virtio_vdev_has_feature(vdev, VIRTIO_F_VERSION_1)) {
         if (!(vdev->status & VIRTIO_CONFIG_S_FEATURES_OK) &&
             val & VIRTIO_CONFIG_S_FEATURES_OK) {
-            int ret = virtio_validate_features(vdev);
-
+            ret = virtio_validate_features(vdev);
             if (ret) {
                 return ret;
             }
@@ -2239,11 +2239,15 @@ int virtio_set_status(VirtIODevice *vdev, uint8_t val)
     }
 
     if (k->set_status) {
-        k->set_status(vdev, val);
+        ret = k->set_status(vdev, val);
+        if (ret) {
+            qemu_log("set %s status to %d failed, old status: %d\n",
+                     vdev->name, val, vdev->status);
+        }
     }
     vdev->status = val;
 
-    return 0;
+    return ret;
 }
 
 static enum virtio_device_endian virtio_default_endian(void)
@@ -2316,49 +2320,6 @@ void virtio_queue_enable(VirtIODevice *vdev, uint32_t queue_index)
     }
 }
 
-void virtio_reset(void *opaque)
-{
-    VirtIODevice *vdev = opaque;
-    VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev);
-    int i;
-
-    virtio_set_status(vdev, 0);
-    if (current_cpu) {
-        /* Guest initiated reset */
-        vdev->device_endian = virtio_current_cpu_endian();
-    } else {
-        /* System reset */
-        vdev->device_endian = virtio_default_endian();
-    }
-
-    if (k->get_vhost) {
-        struct vhost_dev *hdev = k->get_vhost(vdev);
-        /* Only reset when vhost back-end is connected */
-        if (hdev && hdev->vhost_ops) {
-            vhost_reset_device(hdev);
-        }
-    }
-
-    if (k->reset) {
-        k->reset(vdev);
-    }
-
-    vdev->start_on_kick = false;
-    vdev->started = false;
-    vdev->broken = false;
-    vdev->guest_features = 0;
-    vdev->queue_sel = 0;
-    vdev->status = 0;
-    vdev->disabled = false;
-    qatomic_set(&vdev->isr, 0);
-    vdev->config_vector = VIRTIO_NO_VECTOR;
-    virtio_notify_vector(vdev, vdev->config_vector);
-
-    for(i = 0; i < VIRTIO_QUEUE_MAX; i++) {
-        __virtio_queue_reset(vdev, i);
-    }
-}
-
 void virtio_queue_set_addr(VirtIODevice *vdev, int n, hwaddr addr)
 {
     if (!vdev->vq[n].vring.num) {
@@ -3169,6 +3130,49 @@ int virtio_set_features(VirtIODevice *vdev, uint64_t val)
     return ret;
 }
 
+void virtio_reset(void *opaque)
+{
+    VirtIODevice *vdev = opaque;
+    VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev);
+    int i;
+
+    virtio_set_status(vdev, 0);
+    if (current_cpu) {
+        /* Guest initiated reset */
+        vdev->device_endian = virtio_current_cpu_endian();
+    } else {
+        /* System reset */
+        vdev->device_endian = virtio_default_endian();
+    }
+
+    if (k->get_vhost) {
+        struct vhost_dev *hdev = k->get_vhost(vdev);
+        /* Only reset when vhost back-end is connected */
+        if (hdev && hdev->vhost_ops) {
+            vhost_reset_device(hdev);
+        }
+    }
+
+    if (k->reset) {
+        k->reset(vdev);
+    }
+
+    vdev->start_on_kick = false;
+    vdev->started = false;
+    vdev->broken = false;
+    virtio_set_features_nocheck(vdev, 0);
+    vdev->queue_sel = 0;
+    vdev->status = 0;
+    vdev->disabled = false;
+    qatomic_set(&vdev->isr, 0);
+    vdev->config_vector = VIRTIO_NO_VECTOR;
+    virtio_notify_vector(vdev, vdev->config_vector);
+
+    for (i = 0; i < VIRTIO_QUEUE_MAX; i++) {
+        __virtio_queue_reset(vdev, i);
+    }
+}
+
 static void virtio_device_check_notification_compatibility(VirtIODevice *vdev,
                                                            Error **errp)
 {
@@ -3419,7 +3423,7 @@ void virtio_cleanup(VirtIODevice *vdev)
     qemu_del_vm_change_state_handler(vdev->vmstate);
 }
 
-static void virtio_vmstate_change(void *opaque, bool running, RunState state)
+static int virtio_vmstate_change(void *opaque, bool running, RunState state)
 {
     VirtIODevice *vdev = opaque;
     BusState *qbus = qdev_get_parent_bus(DEVICE(vdev));
@@ -3436,8 +3440,12 @@ static void virtio_vmstate_change(void *opaque, bool running, RunState state)
     }
 
     if (!backend_run) {
-        virtio_set_status(vdev, vdev->status);
+        int ret = virtio_set_status(vdev, vdev->status);
+        if (ret) {
+            return ret;
+        }
     }
+    return 0;
 }
 
 void virtio_instance_init_common(Object *proxy_obj, void *data,
@@ -3489,7 +3497,7 @@ void virtio_init(VirtIODevice *vdev, uint16_t device_id, size_t config_size)
         vdev->config = NULL;
     }
     vdev->vmstate = qdev_add_vm_change_state_handler(DEVICE(vdev),
-            virtio_vmstate_change, vdev);
+            NULL, virtio_vmstate_change, vdev);
     vdev->device_endian = virtio_default_endian();
     vdev->use_guest_notifier_mask = true;
 }