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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>
This commit is contained in:
Amit Shah 2010-05-19 22:15:46 -06:00 committed by Rusty Russell
parent b99fa815d7
commit 3425e706bf
1 changed files with 11 additions and 5 deletions
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16
drivers/char/virtio_console.c
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@ -374,22 +374,22 @@ out:
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];