diff options
Diffstat (limited to 'drivers/char')
| -rw-r--r-- | drivers/char/virtio_console.c | 43 |
1 files changed, 31 insertions, 12 deletions
diff --git a/drivers/char/virtio_console.c b/drivers/char/virtio_console.c index 1e3f4674da4a..f1fe11a344e9 100644 --- a/drivers/char/virtio_console.c +++ b/drivers/char/virtio_console.c @@ -78,6 +78,9 @@ struct console { /* The hvc device associated with this console port */ struct hvc_struct *hvc; + /* The size of the console */ + struct winsize ws; + /* * This number identifies the number that we used to register * with hvc in hvc_instantiate() and hvc_alloc(); this is the @@ -773,22 +776,14 @@ static int get_chars(u32 vtermno, char *buf, int count) static void resize_console(struct port *port) { struct virtio_device *vdev; - struct winsize ws; /* The port could have been hot-unplugged */ - if (!port) + if (!port || !is_console_port(port)) return; 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->cons.hvc, ws); - } + if (virtio_has_feature(vdev, VIRTIO_CONSOLE_F_SIZE)) + hvc_resize(port->cons.hvc, port->cons.ws); } /* We set the configuration at this point, since we now have a tty */ @@ -952,6 +947,15 @@ static const struct file_operations port_debugfs_ops = { .read = debugfs_read, }; +static void set_console_size(struct port *port, u16 rows, u16 cols) +{ + if (!port || !is_console_port(port)) + return; + + port->cons.ws.ws_row = rows; + port->cons.ws.ws_col = cols; +} + static unsigned int fill_queue(struct virtqueue *vq, spinlock_t *lock) { struct port_buffer *buf; @@ -1000,6 +1004,8 @@ static int add_port(struct ports_device *portdev, u32 id) port->inbuf = NULL; port->cons.hvc = NULL; + port->cons.ws.ws_row = port->cons.ws.ws_col = 0; + port->host_connected = port->guest_connected = false; port->outvq_full = false; @@ -1320,6 +1326,19 @@ static void config_intr(struct virtio_device *vdev) portdev = vdev->priv; if (!use_multiport(portdev)) { + struct port *port; + u16 rows, cols; + + vdev->config->get(vdev, + offsetof(struct virtio_console_config, cols), + &cols, sizeof(u16)); + vdev->config->get(vdev, + offsetof(struct virtio_console_config, rows), + &rows, sizeof(u16)); + + port = find_port_by_id(portdev, 0); + set_console_size(port, rows, cols); + /* * We'll use this way of resizing only for legacy * support. For newer userspace @@ -1327,7 +1346,7 @@ static void config_intr(struct virtio_device *vdev) * to indicate console size changes so that it can be * done per-port. */ - resize_console(find_port_by_id(portdev, 0)); + resize_console(port); } } |