On Mon, 23 Oct 2023 11:06:48 +0800, Su Hui <suhui@xxxxxxxxxxxx> wrote:
>
> On 2023/10/23 10:53, Xuan Zhuo wrote:
> > On Mon, 23 Oct 2023 10:51:59 +0800, Su Hui <suhui@xxxxxxxxxxxx> wrote:
> >> On 2023/10/23 10:26, Xuan Zhuo wrote:
> >>>>>> Well, what are the cases where it can happen practically?
> >>>>> Device error. Such as vp_active_vq()
> >>>>>
> >>>>> Thanks.
> >>>> Hmm interesting. OK. But do callers know to recover?
> >>> No.
> >>>
> >>> So I think WARN + broken is suitable.
> >>>
> >>> Thanks.
> >> Sorry for the late, is the following code okay?
> >>
> >> @@ -2739,7 +2739,7 @@ int virtqueue_resize(struct virtqueue *_vq, u32 num,
> >> void (*recycle)(struct virtqueue *vq, void *buf))
> >> {
> >> struct vring_virtqueue *vq = to_vvq(_vq);
> >> - int err;
> >> + int err, err_reset;
> >>
> >> if (num > vq->vq.num_max)
> >> return -E2BIG;
> >> @@ -2759,7 +2759,15 @@ int virtqueue_resize(struct virtqueue *_vq, u32 num,
> >> else
> >> err = virtqueue_resize_split(_vq, num);
> >>
> >> - return virtqueue_enable_after_reset(_vq);
> >> + err_reset = virtqueue_enable_after_reset(_vq);
> >> +
> >> + if (err) {
> > No err.
> >
> > err is not important.
> > You can remove that.
>
> Emm, I'm a little confused that which code should I remove ?
like this:
if (vq->packed_ring)
virtqueue_resize_packed(_vq, num);
else
virtqueue_resize_split(_vq, num);
And we should set broken and warn inside virtqueue_enable_after_reset()?
Thanks.
>
> > Thanks.
> >
> >
> >> + vq->broken = true;
> >> + WARN_ON(err_reset);
> >> + return err;
> >> + }
> >> +
> >> + return err_reset;
> >> }
> >>
> >> Thanks.
> >> Su Hui
> >>
