Commit fa8b66cc authored by Amit Shah's avatar Amit Shah Committed by Michael S. Tsirkin

virtio: console: tell host of open ports after resume from s3/s4

If a port was open before going into one of the sleep states, the port
can continue normal operation after restore.  However, the host has to
be told that the guest side of the connection is open to restore
pre-suspend state.

This wasn't noticed so far due to a bug in qemu that was fixed recently
(which marked the guest-side connection as always open).

CC: stable@vger.kernel.org   # Only for 3.3
Signed-off-by: default avatarAmit Shah <amit.shah@redhat.com>
Signed-off-by: default avatarMichael S. Tsirkin <mst@redhat.com>
parent 0e93b4b3
...@@ -1895,6 +1895,13 @@ static int virtcons_restore(struct virtio_device *vdev) ...@@ -1895,6 +1895,13 @@ static int virtcons_restore(struct virtio_device *vdev)
/* Get port open/close status on the host */ /* Get port open/close status on the host */
send_control_msg(port, VIRTIO_CONSOLE_PORT_READY, 1); send_control_msg(port, VIRTIO_CONSOLE_PORT_READY, 1);
/*
* If a port was open at the time of suspending, we
* have to let the host know that it's still open.
*/
if (port->guest_connected)
send_control_msg(port, VIRTIO_CONSOLE_PORT_OPEN, 1);
} }
return 0; return 0;
} }
......
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