Re: [PATCH v11 05/12] vhost-vdpa: Handle the failure of vdpa_reset()

[Jason Wang <jasowang@redhat.com>]

在 2021/8/18 下午8:06, Xie Yongji 写道:
> The vdpa_reset() may fail now. This adds check to its return
> value and fail the vhost_vdpa_open().
>
> Signed-off-by: Xie Yongji <xieyongji@bytedance.com>


Acked-by: Jason Wang <jasowang@redhat.com>


> ---
>   drivers/vhost/vdpa.c | 9 ++++++---
>   1 file changed, 6 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c
> index b1c91b4db0ba..d99d75ad30cc 100644
> --- a/drivers/vhost/vdpa.c
> +++ b/drivers/vhost/vdpa.c
> @@ -116,12 +116,13 @@ static void vhost_vdpa_unsetup_vq_irq(struct vhost_vdpa *v, u16 qid)
>   	irq_bypass_unregister_producer(&vq->call_ctx.producer);
>   }
>   
> -static void vhost_vdpa_reset(struct vhost_vdpa *v)
> +static int vhost_vdpa_reset(struct vhost_vdpa *v)
>   {
>   	struct vdpa_device *vdpa = v->vdpa;
>   
> -	vdpa_reset(vdpa);
>   	v->in_batch = 0;
> +
> +	return vdpa_reset(vdpa);
>   }
>   
>   static long vhost_vdpa_get_device_id(struct vhost_vdpa *v, u8 __user *argp)
> @@ -868,7 +869,9 @@ static int vhost_vdpa_open(struct inode *inode, struct file *filep)
>   		return -EBUSY;
>   
>   	nvqs = v->nvqs;
> -	vhost_vdpa_reset(v);
> +	r = vhost_vdpa_reset(v);
> +	if (r)
> +		goto err;
>   
>   	vqs = kmalloc_array(nvqs, sizeof(*vqs), GFP_KERNEL);
>   	if (!vqs) {