diff options
| author | Amit Shah <amit.shah@redhat.com> | 2013-07-29 14:21:32 +0930 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-08-14 22:55:16 -0700 |
| commit | 7ba6337874c92f15212065b120fa70de573c56ed (patch) | |
| tree | a596a2d217fde31a5d63e52e1e5bbd2508c1b17a /drivers | |
| parent | 64aafc3d30fac8bc65bb28b1bbd97528cb5ef725 (diff) | |
virtio: console: fix raising SIGIO after port unplug
commit 92d3453815fbe74d539c86b60dab39ecdf01bb99 upstream.
SIGIO should be sent when a port gets unplugged. It should only be sent
to prcesses that have the port opened, and have asked for SIGIO to be
delivered. We were clearing out guest_connected before calling
send_sigio_to_port(), resulting in a sigio not getting sent to
processes.
Fix by setting guest_connected to false after invoking the sigio
function.
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/char/virtio_console.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/drivers/char/virtio_console.c b/drivers/char/virtio_console.c index 7a25a7e8a50..0d50d92b101 100644 --- a/drivers/char/virtio_console.c +++ b/drivers/char/virtio_console.c @@ -1263,12 +1263,14 @@ static void unplug_port(struct port *port) spin_unlock_irq(&port->portdev->ports_lock); if (port->guest_connected) { + /* Let the app know the port is going down. */ + send_sigio_to_port(port); + + /* Do this after sigio is actually sent */ port->guest_connected = false; port->host_connected = false; - wake_up_interruptible(&port->waitqueue); - /* Let the app know the port is going down. */ - send_sigio_to_port(port); + wake_up_interruptible(&port->waitqueue); } if (is_console_port(port)) { |