This is a note to let you know that I've just added the patch titled
virtio: console: tell host of open ports after resume from s3/s4
to the 3.3-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
virtio-console-tell-host-of-open-ports-after-resume-from-s3-s4.patch
and it can be found in the queue-3.3 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From fa8b66ccd2d200b64496cfedcce90bf54fe7d6e9 Mon Sep 17 00:00:00 2001
From: Amit Shah <[email protected]>
Date: Wed, 25 Apr 2012 14:40:39 +0530
Subject: virtio: console: tell host of open ports after resume from s3/s4
From: Amit Shah <[email protected]>
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 <[email protected]>
Signed-off-by: Michael S. Tsirkin <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
drivers/char/virtio_console.c | 7 +++++++
1 file changed, 7 insertions(+)
--- a/drivers/char/virtio_console.c
+++ b/drivers/char/virtio_console.c
@@ -1901,6 +1901,13 @@ static int virtcons_restore(struct virti
/* 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;
}
Patches currently in stable-queue which might be from [email protected] are
queue-3.3/virtio-console-tell-host-of-open-ports-after-resume-from-s3-s4.patch
--
To unsubscribe from this list: send the line "unsubscribe stable" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
