virtio-console: notify chardev when writable

When the virtio serial is writable, notify the chardev backend
with qemu_chr_accept_input().

Signed-off-by: Marc-André Lureau <marcandre.lureau@gmail.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>

1 files changed, 10 insertions, 0 deletions

diff --git a/hw/char/virtio-console.c b/hw/char/virtio-console.c
index 752ed2c3c8..2a867cb4e6 100644
--- a/hw/char/virtio-console.c
+++ b/hw/char/virtio-console.c
@@ -95,6 +95,15 @@ static void set_guest_connected(VirtIOSerialPort *port, int guest_connected)
     }
 }
 
+static void guest_writable(VirtIOSerialPort *port)
+{
+    VirtConsole *vcon = VIRTIO_CONSOLE(port);
+
+    if (vcon->chr) {
+        qemu_chr_accept_input(vcon->chr);
+    }
+}
+
 /* Readiness of the guest to accept data on a port */
 static int chr_can_read(void *opaque)
 {
@@ -188,6 +197,7 @@ static void virtserialport_class_init(ObjectClass *klass, void *data)
     k->unrealize = virtconsole_unrealize;
     k->have_data = flush_buf;
     k->set_guest_connected = set_guest_connected;
+    k->guest_writable = guest_writable;
     dc->props = virtserialport_properties;
 }