From: Amit Shah <amit.shah@redhat.com>
Date: Fri, 19 Mar 2010 12:06:44 +0000 (+0530)
Subject: virtio: console: Check if port is valid in resize_console
X-Git-Tag: v2.6.34-rc3~83^2
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=2de16a493cc6153f7fa0b9da12a3862d063e3425;p=profile%2Fcommon%2Fkernel-common.git

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>
---

diff --git a/drivers/char/virtio_console.c b/drivers/char/virtio_console.c
index 67b474b..44288ce 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,