From a274f6ff3c5c79c27d254b48cad3b4814c950908 Mon Sep 17 00:00:00 2001
From: Arseniy Krasnov <AVKrasnov@sberdevices.ru>
Date: Fri, 19 Aug 2022 05:31:43 +0000
Subject: [PATCH] vmci/vsock: use 'target' in notify_poll_in callback
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.
Signed-off-by: Arseniy Krasnov <AVKrasnov@sberdevices.ru>
Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
Reviewed-by: Vishnu Dasa <vdasa@vmware.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
---
net/vmw_vsock/vmci_transport_notify.c | 8 ++++----
net/vmw_vsock/vmci_transport_notify_qstate.c | 8 ++++----
2 files changed, 8 insertions(+), 8 deletions(-)
diff --git a/net/vmw_vsock/vmci_transport_notify.c b/net/vmw_vsock/vmci_transport_notify.c
index d69fc4b595ad4..852097e2b9e6d 100644
--- a/net/vmw_vsock/vmci_transport_notify.c
+++ b/net/vmw_vsock/vmci_transport_notify.c
@@ -340,12 +340,12 @@ 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
- * queue. Ask for notifications when there is something to
- * read.
+ /* We can't read right now because there is not enough data
+ * in the queue. Ask for notifications when there is something
+ * to read.
*/
if (sk->sk_state == TCP_ESTABLISHED) {
if (!send_waiting_read(sk, 1))
diff --git a/net/vmw_vsock/vmci_transport_notify_qstate.c b/net/vmw_vsock/vmci_transport_notify_qstate.c
index 0f36d7c45db39..12f0cb8fe9988 100644
--- a/net/vmw_vsock/vmci_transport_notify_qstate.c
+++ b/net/vmw_vsock/vmci_transport_notify_qstate.c
@@ -161,12 +161,12 @@ 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
- * queue. Ask for notifications when there is something to
- * read.
+ /* We can't read right now because there is not enough data
+ * in the queue. Ask for notifications when there is something
+ * to read.
*/
if (sk->sk_state == TCP_ESTABLISHED)
vsock_block_update_write_window(sk);
--
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