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-rw-r--r--drivers/vhost/vhost.c14
1 files changed, 6 insertions, 8 deletions
diff --git a/drivers/vhost/vhost.c b/drivers/vhost/vhost.c
index 5ef2f62..9a10803 100644
--- a/drivers/vhost/vhost.c
+++ b/drivers/vhost/vhost.c
@@ -629,15 +629,17 @@ static long vhost_set_memory(struct vhost_dev *d, struct vhost_memory __user *m)
return 0;
}
-static int init_used(struct vhost_virtqueue *vq,
- struct vring_used __user *used)
+int vhost_init_used(struct vhost_virtqueue *vq)
{
- int r = put_user(vq->used_flags, &used->flags);
+ int r;
+ if (!vq->private_data)
+ return 0;
+ r = put_user(vq->used_flags, &vq->used->flags);
if (r)
return r;
vq->signalled_used_valid = false;
- return get_user(vq->last_used_idx, &used->idx);
+ return get_user(vq->last_used_idx, &vq->used->idx);
}
static long vhost_set_vring(struct vhost_dev *d, int ioctl, void __user *argp)
@@ -752,10 +754,6 @@ static long vhost_set_vring(struct vhost_dev *d, int ioctl, void __user *argp)
}
}
- r = init_used(vq, (struct vring_used __user *)(unsigned long)
- a.used_user_addr);
- if (r)
- break;
vq->log_used = !!(a.flags & (0x1 << VHOST_VRING_F_LOG));
vq->desc = (void __user *)(unsigned long)a.desc_user_addr;
vq->avail = (void __user *)(unsigned long)a.avail_user_addr;
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