From: Arseniy Krasnov <AVKrasnov@sberdevices.ru>
Date: Fri, 19 Aug 2022 05:31:43 +0000 (+0000)
Subject: vmci/vsock: use 'target' in notify_poll_in callback
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=a274f6ff3c5c79c27d254b48cad3b4814c950908;p=linux.git

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>
---

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);