diff options
Diffstat (limited to 'hw/virtio/dataplane/vring.c')
| -rw-r--r-- | hw/virtio/dataplane/vring.c | 17 |
1 files changed, 6 insertions, 11 deletions
diff --git a/hw/virtio/dataplane/vring.c b/hw/virtio/dataplane/vring.c index 5d17d39c17..67cb2b823e 100644 --- a/hw/virtio/dataplane/vring.c +++ b/hw/virtio/dataplane/vring.c @@ -301,14 +301,16 @@ static void vring_unmap_element(VirtQueueElement *elem) * Stolen from linux/drivers/vhost/vhost.c. */ int vring_pop(VirtIODevice *vdev, Vring *vring, - VirtQueueElement **p_elem) + VirtQueueElement *elem) { struct vring_desc desc; unsigned int i, head, found = 0, num = vring->vr.num; uint16_t avail_idx, last_avail_idx; - VirtQueueElement *elem = NULL; int ret; + /* Initialize elem so it can be safely unmapped */ + elem->in_num = elem->out_num = 0; + /* If there was a fatal error then refuse operation */ if (vring->broken) { ret = -EFAULT; @@ -340,10 +342,8 @@ int vring_pop(VirtIODevice *vdev, Vring *vring, * the index we've seen. */ head = vring->vr.avail->ring[last_avail_idx % num]; - elem = g_slice_new(VirtQueueElement); elem->index = head; - elem->in_num = elem->out_num = 0; - + /* If their number is silly, that's an error. */ if (unlikely(head >= num)) { error_report("Guest says index %u > %u is available", head, num); @@ -391,7 +391,6 @@ int vring_pop(VirtIODevice *vdev, Vring *vring, /* On success, increment avail index. */ vring->last_avail_idx++; - *p_elem = elem; return head; out: @@ -399,11 +398,7 @@ out: if (ret == -EFAULT) { vring->broken = true; } - if (elem) { - vring_unmap_element(elem); - g_slice_free(VirtQueueElement, elem); - } - *p_elem = NULL; + vring_unmap_element(elem); return ret; } |