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Commit 3425e706 authored by Amit Shah's avatar Amit Shah Committed by Rusty Russell
Browse files

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: default avatarAmit Shah <amit.shah@redhat.com>
Signed-off-by: default avatarRusty Russell <rusty@rustcorp.com.au>
parent b99fa815

drivers/char/virtio_console.c

+11 −5
Original line number Diff line number Diff line
@@ -374,22 +374,22 @@ static bool port_has_data(struct port *port) 
	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 @@ static ssize_t send_control_msg(struct port *port, unsigned int event, 
	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];