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SubjectRe: [RFC PATCH v2 3/9] vmci/vsock: use 'target' in notify_poll_in, callback
@Jorgen can you take a look at this series, especially this patch?

Maybe we need to update the comments in the else branch, something like
s/there is nothing/there is not enough data

Thanks,
Stefano

On Mon, Jul 25, 2022 at 08:01:01AM +0000, Arseniy Krasnov wrote:
>This callback controls setting of POLLIN,POLLRDNORM output bits of poll()
>syscall,but in some cases,it is incorrectly to set it, when socket has
>at least 1 bytes of available data. Use 'target' which is already exists
>and equal to sk_rcvlowat in this case.
>
>Signed-off-by: Arseniy Krasnov <AVKrasnov@sberdevices.ru>
>---
> net/vmw_vsock/vmci_transport_notify.c | 2 +-
> net/vmw_vsock/vmci_transport_notify_qstate.c | 2 +-
> 2 files changed, 2 insertions(+), 2 deletions(-)
>
>diff --git a/net/vmw_vsock/vmci_transport_notify.c b/net/vmw_vsock/vmci_transport_notify.c
>index d69fc4b595ad..1684b85b0660 100644
>--- a/net/vmw_vsock/vmci_transport_notify.c
>+++ b/net/vmw_vsock/vmci_transport_notify.c
>@@ -340,7 +340,7 @@ vmci_transport_notify_pkt_poll_in(struct sock *sk,
> {
> struct vsock_sock *vsk = vsock_sk(sk);
>
>- if (vsock_stream_has_data(vsk)) {
>+ if (vsock_stream_has_data(vsk) >= target) {
> *data_ready_now = true;
> } else {
> /* We can't read right now because there is nothing in the
>diff --git a/net/vmw_vsock/vmci_transport_notify_qstate.c b/net/vmw_vsock/vmci_transport_notify_qstate.c
>index 0f36d7c45db3..a40407872b53 100644
>--- a/net/vmw_vsock/vmci_transport_notify_qstate.c
>+++ b/net/vmw_vsock/vmci_transport_notify_qstate.c
>@@ -161,7 +161,7 @@ vmci_transport_notify_pkt_poll_in(struct sock *sk,
> {
> struct vsock_sock *vsk = vsock_sk(sk);
>
>- if (vsock_stream_has_data(vsk)) {
>+ if (vsock_stream_has_data(vsk) >= target) {
> *data_ready_now = true;
> } else {
> /* We can't read right now because there is nothing in the
>--
>2.25.1

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