---
hw/usb-bus.c | 5 +++++
1 files changed, 5 insertions(+), 0 deletions(-)
diff --git a/hw/usb-bus.c b/hw/usb-bus.c
index 2ae2678..1817d5c 100644
--- a/hw/usb-bus.c
+++ b/hw/usb-bus.c
@@ -200,6 +200,11 @@ static int do_attach(USBDevice *dev)
} else {
port = QTAILQ_FIRST(&bus->free);
}
+ if (!(port->speedmask & dev->speedmask)) {
+ fprintf(stderr, "Warning: speed mismatch trying to attach usb device
%s to bus %s\n",
+ dev->product_desc, bus->qbus.name);
+ return -1;
+ }
dev->attached++;
QTAILQ_REMOVE(&bus->free, port, next);
--
1.7.5.1
