From 2de16a493cc6153f7fa0b9da12a3862d063e3425 Mon Sep 17 00:00:00 2001
From: Amit Shah <amit.shah@redhat.com>
Date: Fri, 19 Mar 2010 17:36:44 +0530
Subject: [PATCH] virtio: console: Check if port is valid in resize_console
The console port could have been hot-unplugged. Check if it is valid
before working on it.
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
drivers/char/virtio_console.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/char/virtio_console.c b/drivers/char/virtio_console.c
index 67b474b4167c..44288ce0cb45 100644
--- a/drivers/char/virtio_console.c
+++ b/drivers/char/virtio_console.c
@@ -681,6 +681,10 @@ static void resize_console(struct port *port)
struct virtio_device *vdev;
struct winsize ws;
+ /* The port could have been hot-unplugged */
+ if (!port)
+ return;
+
vdev = port->portdev->vdev;
if (virtio_has_feature(vdev, VIRTIO_CONSOLE_F_SIZE)) {
vdev->config->get(vdev,
--
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