Re: [Qemu-devel] [PATCH v5 10/12] block/io_uring: adds userspace completion polling

[Maxim Levitsky]

On Tue, 2019-06-11 at 10:51 +0100, Stefan Hajnoczi wrote:
> On Mon, Jun 10, 2019 at 07:19:03PM +0530, Aarushi Mehta wrote:
> > +static bool qemu_luring_poll_cb(void *opaque)
> > +{
> > +    LuringState *s = opaque;
> > +    struct io_uring_cqe *cqes;
> > +
> > +    if (io_uring_peek_cqe(&s->ring, &cqes) == 0) {
> > +        if (!cqes) {
> > +            qemu_luring_process_completions_and_submit(s);
> > +            return true;
> > +        }
> 
> Is this logic inverted?  We have a completion when cqes != NULL.

This indeed looks inverted to me.

Best regards,
        Maxim Levitsky