set_channel_read_mode
set_channel_read_mode(dev->channel, HV_CALL_DIRECT);
set_channel_read_mode(device->channel, HV_CALL_ISR);
set_channel_read_mode(new_sc, HV_CALL_ISR);
set_channel_read_mode(new_sc, HV_CALL_ISR);
set_channel_read_mode(channel, HV_CALL_ISR);
set_channel_read_mode(chan, HV_CALL_DIRECT);