Changeset 59113 in vbox for trunk/src/VBox/Devices/USB

Timestamp:

Dec 14, 2015 11:55:19 AM (9 years ago)

Author:

vboxsync

Message:

DevOHCI: bugref:8125: wakeup the framer thread only if framerate was changed

File:

• trunk/src/VBox/Devices/USB/DevOHCI.cpp (modified) (3 diffs)

trunk/src/VBox/Devices/USB/DevOHCI.cpp

@@ -2185 +2185 @@
  * @param   pThis    The OHCI device data.
  */
-static void ohciFramerateCalcNew(POHCI pThis)
+static bool ohciFramerateCalcNew(POHCI pThis)
 {
     uint32_t uNewFrameRate = pThis->uFrameRate;
@@ -2219 +2219 @@
         LogFlow(("Frame rate changed from %u to %u\n", pThis->uFrameRate, uNewFrameRate));
         ohciCalcTimerIntervals(pThis, uNewFrameRate);
-    }
+        return true;
+    }
+    return false;
 }
 
@@ -2609 +2611 @@
     ohciWriteEd(pThis, pUrb->Hci.EdAddr, &Ed);
 
-    /* Calculate new frame rate and wakeup the . */
-    ohciFramerateCalcNew(pThis);
-    RTSemEventMultiSignal(pThis->hSemEventFrame);
+    /* Calculate new frame rate and wakeup the framer thread if the rate was chnaged. */
+    if (ohciFramerateCalcNew(pThis))
+        RTSemEventMultiSignal(pThis->hSemEventFrame);
+
     RTCritSectLeave(&pThis->CritSect);
 }