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virtio: console: make discard_port_data() use get_inbuf() 

discard_port_data() used virtqueue_get_buf() directly instead of using
get_inbuf().  Fix this, so that we get accounting for all received
bytes.  This also simplifies the code a lot.

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 2011-09-14 13:06:45 +05:30 committed by Rusty Russell
parent ce072a0cee
commit 2d24cdaa6e
1 changed files with 5 additions and 10 deletions
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15
drivers/char/virtio_console.c
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@ -386,28 +386,23 @@ static int add_inbuf(struct virtqueue *vq, struct port_buffer *buf)
static void discard_port_data(struct port *port)
{
struct port_buffer *buf;
struct virtqueue *vq;
unsigned int len, err;
unsigned int err;
if (!port->portdev) {
/* Device has been unplugged. vqs are already gone. */
return;
}
vq = port->in_vq;
if (port->inbuf)
buf = port->inbuf;
else
buf = virtqueue_get_buf(vq, &len);
buf = get_inbuf(port);
err = 0;
while (buf) {
if (add_inbuf(vq, buf) < 0) {
if (add_inbuf(port->in_vq, buf) < 0) {
err++;
free_buf(buf);
}
buf = virtqueue_get_buf(vq, &len);
port->inbuf = NULL;
buf = get_inbuf(port);
}
port->inbuf = NULL;
if (err)
dev_warn(port->dev, "Errors adding %d buffers back to vq\n",
err);