Re: [Xen-devel] [PATCH v5 11/13] xen/pvcalls: implement poll command

[Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>]

On 10/23/2017 07:06 PM, Stefano Stabellini wrote:
> On Tue, 17 Oct 2017, Boris Ostrovsky wrote:
>>> +static unsigned int pvcalls_front_poll_passive(struct file *file,
>>> +                                          struct pvcalls_bedata *bedata,
>>> +                                          struct sock_mapping *map,
>>> +                                          poll_table *wait)
>>> +{
>>> +   int notify, req_id, ret;
>>> +   struct xen_pvcalls_request *req;
>>> +
>>> +   if (test_bit(PVCALLS_FLAG_ACCEPT_INFLIGHT,
>>> +                (void *)&map->passive.flags)) {
>>> +           uint32_t req_id = READ_ONCE(map->passive.inflight_req_id);
>>> +
>>> +           if (req_id != PVCALLS_INVALID_ID &&
>>> +               READ_ONCE(bedata->rsp[req_id].req_id) == req_id)
>>> +                   return POLLIN | POLLRDNORM;
>>
>> Same READ_ONCE() question as for an earlier patch.
> Same answer :-)


Reviewed-by: Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>

>
>
>>> +
>>> +           poll_wait(file, &map->passive.inflight_accept_req, wait);
>>> +           return 0;
>>> +   }
>>> +


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