From: Michael S. Tsirkin <m...@redhat.com>
Since commit 98b19252cf1bd97c54bc4613f3537c5ec0aae263, all
serial devices declare MULTIPORT feature.
To allow 0.12 compatibility, we should clear this when
max_nr_ports is 1.
Signed-off-by: Michael S. Tsirkin <m...@redhat.com>
Signed-off-by: Amit Shah <amit.s...@redhat.com>
---
hw/virtio-serial-bus.c | 6 ++++--
1 files changed, 4 insertions(+), 2 deletions(-)
diff --git a/hw/virtio-serial-bus.c b/hw/virtio-serial-bus.c
index ab456ea..d0e0219 100644
--- a/hw/virtio-serial-bus.c
+++ b/hw/virtio-serial-bus.c
@@ -335,8 +335,10 @@ static void handle_input(VirtIODevice *vdev, VirtQueue *vq)
static uint32_t get_features(VirtIODevice *vdev, uint32_t features)
{
- features |= (1 << VIRTIO_CONSOLE_F_MULTIPORT);
-
+ VirtIOSerial *vser = DO_UPCAST(VirtIOSerial, vdev, vdev);
+ if (vser->bus->max_nr_ports > 1) {
+ features |= (1 << VIRTIO_CONSOLE_F_MULTIPORT);
+ }
return features;
}
--
1.6.2.5
