[dma] Always keep transfer queue size up to date

Author: kostorr

src/Cru/CruDmaChannel.cxx

@@ -189,6 +189,7 @@ void CruDmaChannel::deviceStopDma()
       link.queue.front().setReady(false);
       mReadyQueue.push_back(link.queue.front());
       link.queue.pop_front();
+      mLinkQueuesTotalAvailable++;
     }
 
     if (!link.queue.empty()) {
@@ -197,10 +198,6 @@ void CruDmaChannel::deviceStopDma()
     }
   }
 
-  if (getTransferQueueAvailable()) {
-    BOOST_THROW_EXCEPTION(Exception() << ErrorInfo::Message("Transfer queue not full when it should be"));
-  }
-
   log((format("Moved %1% remaining superpage(s) to ready queue") % moved).str());
 }