Lock the control pipe mutex before destroying it to ensure that a possibly

still open transfer has enough time to cleanly exit with error. Fixes a crash
when removing a device while a control transfer on the device endpoint was
open and would have timed out otherwise.

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@25863 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/add-ons/kernel/bus_managers/usb/Pipe.cpp

@@ -301,6 +301,7 @@ ControlPipe::~ControlPipe()
 {
 	if (fNotifySem >= 0)
 		delete_sem(fNotifySem);
+	mutex_lock(&fSendRequestLock);
 	mutex_destroy(&fSendRequestLock);
 }