virtio: console: Add a __send_control_msg() that can send messages without a valid port
We will introduce control messages that operate on the device as a whole
rather than just ports. Make send_control_msg() a wrapper around
__send_control_msg() which does not need a valid port.
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
diff --git a/drivers/char/virtio_console.c b/drivers/char/virtio_console.c
index e53c52b..8c24b86 100644
--- a/drivers/char/virtio_console.c
+++ b/drivers/char/virtio_console.c
@@ -374,22 +374,22 @@
return ret;
}
-static ssize_t send_control_msg(struct port *port, unsigned int event,
- unsigned int value)
+static ssize_t __send_control_msg(struct ports_device *portdev, u32 port_id,
+ unsigned int event, unsigned int value)
{
struct scatterlist sg[1];
struct virtio_console_control cpkt;
struct virtqueue *vq;
unsigned int len;
- if (!use_multiport(port->portdev))
+ if (!use_multiport(portdev))
return 0;
- cpkt.id = port->id;
+ cpkt.id = port_id;
cpkt.event = event;
cpkt.value = value;
- vq = port->portdev->c_ovq;
+ vq = portdev->c_ovq;
sg_init_one(sg, &cpkt, sizeof(cpkt));
if (virtqueue_add_buf(vq, sg, 1, 0, &cpkt) >= 0) {
@@ -400,6 +400,12 @@
return 0;
}
+static ssize_t send_control_msg(struct port *port, unsigned int event,
+ unsigned int value)
+{
+ return __send_control_msg(port->portdev, port->id, event, value);
+}
+
static ssize_t send_buf(struct port *port, void *in_buf, size_t in_count)
{
struct scatterlist sg[1];