usb-host: fix streams detection in usb_host_speed_compat

The companion descriptor is present on all usb3 devices, not only
those with streams support.  We need to check attributes to see
whenever the device uses streams or not.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Message-id: 1473406890-30164-1-git-send-email-kraxel@redhat.com

diff --git a/hw/usb/host-libusb.c b/hw/usb/host-libusb.c
index e94672c15563e77b9a5b1fb099ebd3692c3a2e4a..bd81d71a98f6843ae0cab6f50d6b5759821b0adb 100644 (file)
--- a/hw/usb/host-libusb.c
+++ b/hw/usb/host-libusb.c
@@ -743,10 +743,13 @@ static void usb_host_speed_compat(USBHostDevice *s)
                         rc = libusb_get_ss_endpoint_companion_descriptor
                             (ctx, endp, &endp_ss_comp);
                         if (rc == LIBUSB_SUCCESS) {
+                            int streams = endp_ss_comp->bmAttributes & 0x1f;
+                            if (streams) {
+                                compat_full = false;
+                                compat_high = false;
+                            }
                             libusb_free_ss_endpoint_companion_descriptor
                                 (endp_ss_comp);
-                            compat_full = false;
-                            compat_high = false;
                         }
 #endif
                         break;