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virtio: console: ensure add_inbuf can work for multiple ports as well 

add_inbuf() assumed one port and one inbuf per port. Remove that
assumption.

Also move the function so that put_chars and get_chars are together.

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 19:15:02 +05:30 committed by Rusty Russell
parent fdb9a05455
commit e27b519807
1 changed files with 18 additions and 17 deletions
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35
drivers/char/virtio_console.c
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@ -77,6 +77,22 @@ fail:
return NULL;
}
/*
* Create a scatter-gather list representing our input buffer and put
* it in the queue.
*
* Callers should take appropriate locks.
*/
static void add_inbuf(struct virtqueue *vq, struct port_buffer *buf)
{
struct scatterlist sg[1];
sg_init_one(sg, buf->buf, buf->size);
if (vq->vq_ops->add_buf(vq, sg, 0, 1, buf) < 0)
BUG();
vq->vq_ops->kick(vq);
}
/*
* The put_chars() callback is pretty straightforward.
*
@ -111,21 +127,6 @@ static int put_chars(u32 vtermno, const char *buf, int count)
return count;
}
/*
* Create a scatter-gather list representing our input buffer and put
* it in the queue.
*/
static void add_inbuf(struct port *port)
{
struct scatterlist sg[1];
sg_init_one(sg, port->inbuf->buf, PAGE_SIZE);
/* Should always be able to add one buffer to an empty queue. */
if (port->in_vq->vq_ops->add_buf(port->in_vq, sg, 0, 1, port) < 0)
BUG();
port->in_vq->vq_ops->kick(port->in_vq);
}
/*
* get_chars() is the callback from the hvc_console infrastructure
* when an interrupt is received.
@ -162,7 +163,7 @@ static int get_chars(u32 vtermno, char *buf, int count)
/* Finished? Re-register buffer so Host will use it again. */
if (port->inbuf->offset == port->inbuf->len)
add_inbuf(port);
add_inbuf(port->in_vq, port->inbuf);
return count;
}
@ -294,7 +295,7 @@ static int __devinit virtcons_probe(struct virtio_device *vdev)
}
/* Register the input buffer the first time. */
add_inbuf(port);
add_inbuf(port->in_vq, port->inbuf);
/* Start using the new console output. */
early_put_chars = NULL;