virtio: console: We support only one device at a time
We support only one virtio_console device at a time. If multiple are
found, error out if one is already initialized.
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
diff --git a/drivers/char/virtio_console.c b/drivers/char/virtio_console.c
index 791be4e..bfc0abf 100644
--- a/drivers/char/virtio_console.c
+++ b/drivers/char/virtio_console.c
@@ -204,6 +204,11 @@
struct virtqueue *vqs[2];
int err;
+ if (vdev) {
+ dev_warn(&vdev->dev,
+ "Multiple virtio-console devices not supported yet\n");
+ return -EEXIST;
+ }
vdev = dev;
/* This is the scratch page we use to receive console input */