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@xxxxxxxxxx>
---
drivers/char/virtio_console.c | 15 +++++++++++++++
1 files changed, 15 insertions(+), 0 deletions(-)
diff --git a/drivers/char/virtio_console.c b/drivers/char/virtio_console.c
index d689c76..a37a868 100644
--- a/drivers/char/virtio_console.c
+++ b/drivers/char/virtio_console.c
@@ -48,6 +48,9 @@ struct ports_driver_data {
/* Used for exporting per-port information to debugfs */
struct dentry *debugfs_dir;
+ /* List of all the devices we're handling */
+ struct list_head portdevs;
+
/* Number of devices this driver is handling */
unsigned int index;
@@ -108,6 +111,9 @@ struct port_buffer {
* ports for that device (vdev->priv).
*/
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
* notification
@@ -1584,6 +1590,10 @@ static int __devinit virtcons_probe(struct virtio_device *vdev)
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,
VIRTIO_CONSOLE_DEVICE_READY, 1);
return 0;
@@ -1610,6 +1620,10 @@ static void virtcons_remove(struct virtio_device *vdev)
portdev = vdev->priv;
+ spin_lock_irq(&pdrvdata_lock);
+ list_del(&portdev->list);
+ spin_unlock_irq(&pdrvdata_lock);
+
/* Disable interrupts for vqs */
vdev->config->reset(vdev);
/* Finish up work that's lined up */
@@ -1676,6 +1690,7 @@ static int __init init(void)
PTR_ERR(pdrvdata.debugfs_dir));
}
INIT_LIST_HEAD(&pdrvdata.consoles);
+ INIT_LIST_HEAD(&pdrvdata.portdevs);
return register_virtio_driver(&virtio_console);
}
--
1.7.2.2
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