Changeset 43839 in vbox for trunk/src

Timestamp:

Nov 8, 2012 12:31:07 PM (12 years ago)

Author:

vboxsync

Message:

VBoxUsb/win: Earlier we assumed that 1 request will be pending while we service Device Power IRP which was leading to host hang when USB is connected
to VM.
With debugging found that at the point when host goes to sleep
state and USB is connected to VM, two Power IRP requests are pending :
One for SYSTEM and other for DEVICE.

File:

• trunk/src/VBox/HostDrivers/VBoxUSB/win/dev/VBoxUsbDev.h (modified) (1 diff)

trunk/src/VBox/HostDrivers/VBoxUSB/win/dev/VBoxUsbDev.h

@@ -192 +192 @@
 static DECLHIDDEN(VOID) vboxUsbDdiStateWaitOtherCompleted(PVBOXUSBDEV_EXT pDevExt)
 {
-    VBoxDrvToolRefWaitEqual(&pDevExt->DdiState.Ref, 2);
+    /* Earlier we assumed that 1 request will be pending while we service
+       Device Power IRP which was leading to host hang when USB is connected
+       to VM.
+       With debugging found that at the point when host goes to sleep
+       state and USB is connected to VM,  two Power IRP requests are pending :
+       One for SYSTEM and other for DEVICE.
+    */
+    VBoxDrvToolRefWaitEqual(&pDevExt->DdiState.Ref, 3);
 }