haraldwolff/qemu-patch-raspberry4
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virtio-serial-bus: Ports are expected to implement 'have_data' callback

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There's no need to check if ports can accept any incoming data from the
guest each time the guest sends data.  Check if the port implements such
functionality during port initialisation.

Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Amit Shah 2011-12-21 12:28:29 +05:30 committed by Anthony Liguori
parent 05e7af694c
commit 03ecd2c80a
1 changed files with 3 additions and 3 deletions
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6
hw/virtio-serial-bus.c
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@ -466,13 +466,11 @@ static void handle_output(VirtIODevice *vdev, VirtQueue *vq)
{
VirtIOSerial *vser;
VirtIOSerialPort *port;
VirtIOSerialPortInfo *info;
vser = DO_UPCAST(VirtIOSerial, vdev, vdev);
port = find_port_by_vq(vser, vq);
info = port ? DO_UPCAST(VirtIOSerialPortInfo, qdev, port->dev.info) : NULL;
if (!port || !port->host_connected || !info->have_data) {
if (!port || !port->host_connected) {
discard_vq_data(vq, vdev);
return;
}
@ -746,6 +744,8 @@ static int virtser_port_qdev_init(DeviceState *qdev, DeviceInfo *base)
port->vser = bus->vser;
port->bh = qemu_bh_new(flush_queued_data_bh, port);
assert(info->have_data);
/*
* Is the first console port we're seeing? If so, put it up at
* location 0. This is done for backward compatibility (old