[Qemu-devel] [PATCH 12/14] usb-bus: Don't allow attaching a device to a bus with no free ports

[Hans de Goede <hdegoede@redhat.com>]

---
 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 91f2083..bb040d2 100644
--- a/hw/usb-bus.c
+++ b/hw/usb-bus.c
@@ -179,6 +179,11 @@ static void do_attach(USBDevice *dev)
                 dev->product_desc);
         return;
     }
+    if (bus->nfree == 0) {
+        fprintf(stderr, "Warning: tried to attach usb device %s to a bus with no free ports\n",
+                dev->product_desc);
+        return;
+    }
     if (dev->port_path) {
         QTAILQ_FOREACH(port, &bus->free, next) {
             if (strcmp(port->path, dev->port_path) == 0) {
-- 
1.7.5.1