Report superspeed properly on Win7

Win7 with USB 3.0 stack might not report superspeed the same way as Win8 does. Use bcdUSB field of device descriptor for that (USB 3.0 device connected to USB 2.x port usually falls to USB 2 compatible configuration). Getting the speed from HUB driver via IOCTL is more complicated. Signed-off-by: Yuri Benditovich <[email protected]>
netusb · Oct 17, 2018 · 4d1ecea · 4d1ecea
1 parent 960f44e
commit 4d1ecea
Showing 1 changed file with 9 additions and 0 deletions.
diff --git a/UsbDk/FilterDevice.cpp b/UsbDk/FilterDevice.cpp
@@ -362,6 +362,15 @@ void CUsbDkHubFilterStrategy::RegisterNewChild(PDEVICE_OBJECT PDO)
         return;
     }
 
+#if (NTDDI_VERSION == NTDDI_WIN7)
+    // recheck on Win7, superspeed indication as on Win8 might be not available
+    if (Speed == HighSpeed && DevDescriptor.bcdUSB >= 0x300)
+    {
+        TraceEvents(TRACE_LEVEL_INFORMATION, TRACE_FILTERDEVICE, "%!FUNC! superspeed assigned according to BCD field");
+        Speed = SuperSpeed;
+    }
+#endif
+
     CUsbDkChildDevice::TDescriptorsCache CfgDescriptors(DevDescriptor.bNumConfigurations);
 
     if (!CfgDescriptors.Create())