virtio: console: tell host of open ports after resume from s3/s4
authorAmit Shah <amit.shah@redhat.com>
Wed, 25 Apr 2012 09:10:39 +0000 (14:10 +0530)
committerMichael S. Tsirkin <mst@redhat.com>
Thu, 17 May 2012 09:14:33 +0000 (12:14 +0300)
commitfa8b66ccd2d200b64496cfedcce90bf54fe7d6e9
tree11a35ac8a4739bae2225676abeab175ec8c1d160
parent0e93b4b304ae052ba1bc73f6d34a68556fe93429
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: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
drivers/char/virtio_console.c