virtio: console: fix raising SIGIO after port unplug
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. CC: <stable@vger.kernel.org> Signed-off-by: Amit Shah <amit.shah@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
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@ -1551,12 +1551,14 @@ static void unplug_port(struct port *port)
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spin_unlock_irq(&port->portdev->ports_lock);
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if (port->guest_connected) {
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port->guest_connected = false;
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port->host_connected = false;
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wake_up_interruptible(&port->waitqueue);
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/* Let the app know the port is going down. */
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send_sigio_to_port(port);
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/* Do this after sigio is actually sent */
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port->guest_connected = false;
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port->host_connected = false;
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wake_up_interruptible(&port->waitqueue);
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}
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if (is_console_port(port)) {
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