From 17b85e4808e2593a234a34e629a5ae08e5246958 Mon Sep 17 00:00:00 2001 From: Amit Shah Date: Wed, 25 Apr 2012 14:40:39 +0530 Subject: [PATCH] virtio: console: tell host of open ports after resume from s3/s4 commit fa8b66ccd2d200b64496cfedcce90bf54fe7d6e9 upstream. 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). Signed-off-by: Amit Shah Signed-off-by: Michael S. Tsirkin Signed-off-by: Greg Kroah-Hartman --- drivers/char/virtio_console.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/drivers/char/virtio_console.c b/drivers/char/virtio_console.c index b58b56187065..41fc148d2e2c 100644 --- a/drivers/char/virtio_console.c +++ b/drivers/char/virtio_console.c @@ -1901,6 +1901,13 @@ static int virtcons_restore(struct virtio_device *vdev) /* Get port open/close status on the host */ 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; } -- 2.39.5