virtio: console: Add a list of portdevs that are active
The virtio_console.c driver is capable of handling multiple devices at a time. Maintain a list of devices for future traversal. Signed-off-by: Amit Shah <amit.shah@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
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@ -48,6 +48,9 @@ struct ports_driver_data {
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/* Used for exporting per-port information to debugfs */
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struct dentry *debugfs_dir;
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/* List of all the devices we're handling */
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struct list_head portdevs;
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/* Number of devices this driver is handling */
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unsigned int index;
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@ -108,6 +111,9 @@ struct port_buffer {
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* ports for that device (vdev->priv).
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*/
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struct ports_device {
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/* Next portdev in the list, head is in the pdrvdata struct */
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struct list_head list;
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/*
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* Workqueue handlers where we process deferred work after
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* notification
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@ -1599,6 +1605,10 @@ static int __devinit virtcons_probe(struct virtio_device *vdev)
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add_port(portdev, 0);
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}
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spin_lock_irq(&pdrvdata_lock);
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list_add_tail(&portdev->list, &pdrvdata.portdevs);
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spin_unlock_irq(&pdrvdata_lock);
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__send_control_msg(portdev, VIRTIO_CONSOLE_BAD_ID,
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VIRTIO_CONSOLE_DEVICE_READY, 1);
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return 0;
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@ -1625,6 +1635,10 @@ static void virtcons_remove(struct virtio_device *vdev)
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portdev = vdev->priv;
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spin_lock_irq(&pdrvdata_lock);
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list_del(&portdev->list);
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spin_unlock_irq(&pdrvdata_lock);
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/* Disable interrupts for vqs */
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vdev->config->reset(vdev);
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/* Finish up work that's lined up */
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@ -1691,6 +1705,7 @@ static int __init init(void)
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PTR_ERR(pdrvdata.debugfs_dir));
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}
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INIT_LIST_HEAD(&pdrvdata.consoles);
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INIT_LIST_HEAD(&pdrvdata.portdevs);
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return register_virtio_driver(&virtio_console);
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}
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