diff options
author | Amit Shah <amit.shah@redhat.com> | 2010-05-19 22:15:49 -0600 |
---|---|---|
committer | Rusty Russell <rusty@rustcorp.com.au> | 2010-05-19 22:15:49 +0930 |
commit | 1d05160be743c506b1d6926e7c637496fa750cd3 (patch) | |
tree | dd4d366c0a6cbdef3f5747f104c515d558d00f55 | |
parent | f909f850d666e3dbac1ee7c9d5d83416bd02f84e (diff) |
virtio: console: Don't always create a port 0 if using multiport
If we're using multiport, there's no point in always creating a console
port. Create the console port only if the host doesn't support
multiport.
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
-rw-r--r-- | drivers/char/virtio_console.c | 32 |
1 files changed, 15 insertions, 17 deletions
diff --git a/drivers/char/virtio_console.c b/drivers/char/virtio_console.c index 7671914be172..6207e3729923 100644 --- a/drivers/char/virtio_console.c +++ b/drivers/char/virtio_console.c @@ -784,6 +784,13 @@ int init_port_console(struct port *port) spin_unlock_irq(&pdrvdata_lock); port->guest_connected = true; + /* + * Start using the new console output if this is the first + * console to come up. + */ + if (early_put_chars) + early_put_chars = NULL; + /* Notify host of port being opened */ send_control_msg(port, VIRTIO_CONSOLE_PORT_OPEN, 1); @@ -1058,14 +1065,8 @@ static void handle_control_message(struct ports_device *portdev, switch (cpkt->event) { case VIRTIO_CONSOLE_PORT_ADD: if (port) { - /* - * This can happen for port 0: we have to - * create a console port during probe() as was - * the behaviour before the MULTIPORT feature. - * On a newer host, when the host tells us - * that a port 0 is available, we should just - * say we have the port all set up. - */ + dev_dbg(&portdev->vdev->dev, + "Port %u already added\n", port->id); send_control_msg(port, VIRTIO_CONSOLE_PORT_READY, 1); break; } @@ -1409,17 +1410,14 @@ static int __devinit virtcons_probe(struct virtio_device *vdev) err = -ENOMEM; goto free_vqs; } + } else { + /* + * For backward compatibility: Create a console port + * if we're running on older host. + */ + add_port(portdev, 0); } - /* - * For backward compatibility: if we're running on an older - * host, we always want to create a console port. - */ - add_port(portdev, 0); - - /* Start using the new console output. */ - early_put_chars = NULL; - __send_control_msg(portdev, VIRTIO_CONSOLE_BAD_ID, VIRTIO_CONSOLE_DEVICE_READY, 1); return 0; |