From 2817b99f91475b84c23cd353741ea485564f4562 Mon Sep 17 00:00:00 2001 From: Amit Shah Date: Mon, 29 Jul 2013 14:21:32 +0930 Subject: 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 Signed-off-by: Rusty Russell Signed-off-by: Greg Kroah-Hartman --- drivers/char/virtio_console.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/drivers/char/virtio_console.c b/drivers/char/virtio_console.c index 4e684faee10..e4845f1c9a0 100644 --- a/drivers/char/virtio_console.c +++ b/drivers/char/virtio_console.c @@ -1551,12 +1551,14 @@ 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)) { -- cgit v1.2.3