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virtio: console: ensure console size is updated on hvc open 

When multiple console support is added, ensure each port's size gets
updated when a new one is opened via hvc.

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 2010-01-18 19:15:08 +05:30 committed by Rusty Russell
parent 1c85bf3544
commit cb06e3676b
1 changed files with 17 additions and 16 deletions
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33
drivers/char/virtio_console.c
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@ -251,27 +251,28 @@ static int get_chars(u32 vtermno, char *buf, int count)
return count;
}
/*
* virtio console configuration. This supports:
* - console resize
*/
static void virtcons_apply_config(struct virtio_device *dev)
static void resize_console(struct port *port)
{
struct virtio_device *vdev;
struct winsize ws;
if (virtio_has_feature(dev, VIRTIO_CONSOLE_F_SIZE)) {
dev->config->get(dev,
offsetof(struct virtio_console_config, cols),
&ws.ws_col, sizeof(u16));
dev->config->get(dev,
offsetof(struct virtio_console_config, rows),
&ws.ws_row, sizeof(u16));
/* This is the pre-multiport style: we use control messages
* these days which specify the port. So this means port 0. */
hvc_resize(find_port_by_vtermno(0)->hvc, ws);
vdev = port->portdev->vdev;
if (virtio_has_feature(vdev, VIRTIO_CONSOLE_F_SIZE)) {
vdev->config->get(vdev,
offsetof(struct virtio_console_config, cols),
&ws.ws_col, sizeof(u16));
vdev->config->get(vdev,
offsetof(struct virtio_console_config, rows),
&ws.ws_row, sizeof(u16));
hvc_resize(port->hvc, ws);
}
}
static void virtcons_apply_config(struct virtio_device *vdev)
{
resize_console(find_port_by_vtermno(0));
}
/* We set the configuration at this point, since we now have a tty */
static int notifier_add_vio(struct hvc_struct *hp, int data)
{
@ -282,7 +283,7 @@ static int notifier_add_vio(struct hvc_struct *hp, int data)
return -EINVAL;
hp->irq_requested = 1;
virtcons_apply_config(port->portdev->vdev);
resize_console(port);
return 0;
}