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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>
This commit is contained in:
Amit Shah 2010-09-02 18:11:49 +05:30 committed by Rusty Russell
parent 8ad37e83c8
commit 6bdf2afd02
1 changed files with 15 additions and 0 deletions
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15
drivers/char/virtio_console.c
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@ -48,6 +48,9 @@ struct ports_driver_data {
/* Used for exporting per-port information to debugfs */ /* Used for exporting per-port information to debugfs */
struct dentry *debugfs_dir; struct dentry *debugfs_dir;
/* List of all the devices we're handling */
struct list_head portdevs;
/* Number of devices this driver is handling */ /* Number of devices this driver is handling */
unsigned int index; unsigned int index;
@ -108,6 +111,9 @@ struct port_buffer {
* ports for that device (vdev->priv). * ports for that device (vdev->priv).
*/ */
struct ports_device { struct ports_device {
/* Next portdev in the list, head is in the pdrvdata struct */
struct list_head list;
/* /*
* Workqueue handlers where we process deferred work after * Workqueue handlers where we process deferred work after
* notification * notification
@ -1599,6 +1605,10 @@ static int __devinit virtcons_probe(struct virtio_device *vdev)
add_port(portdev, 0); add_port(portdev, 0);
} }
spin_lock_irq(&pdrvdata_lock);
list_add_tail(&portdev->list, &pdrvdata.portdevs);
spin_unlock_irq(&pdrvdata_lock);
__send_control_msg(portdev, VIRTIO_CONSOLE_BAD_ID, __send_control_msg(portdev, VIRTIO_CONSOLE_BAD_ID,
VIRTIO_CONSOLE_DEVICE_READY, 1); VIRTIO_CONSOLE_DEVICE_READY, 1);
return 0; return 0;
@ -1625,6 +1635,10 @@ static void virtcons_remove(struct virtio_device *vdev)
portdev = vdev->priv; portdev = vdev->priv;
spin_lock_irq(&pdrvdata_lock);
list_del(&portdev->list);
spin_unlock_irq(&pdrvdata_lock);
/* Disable interrupts for vqs */ /* Disable interrupts for vqs */
vdev->config->reset(vdev); vdev->config->reset(vdev);
/* Finish up work that's lined up */ /* Finish up work that's lined up */
@ -1691,6 +1705,7 @@ static int __init init(void)
PTR_ERR(pdrvdata.debugfs_dir)); PTR_ERR(pdrvdata.debugfs_dir));
} }
INIT_LIST_HEAD(&pdrvdata.consoles); INIT_LIST_HEAD(&pdrvdata.consoles);
INIT_LIST_HEAD(&pdrvdata.portdevs);
return register_virtio_driver(&virtio_console); return register_virtio_driver(&virtio_console);
} }