diff -r 2d65c2f76d7b -r 947f0dc9f7a8 kernel/eka/drivers/locmedia/locmedia.cpp
--- a/kernel/eka/drivers/locmedia/locmedia.cpp	Tue Feb 02 01:24:03 2010 +0200
+++ b/kernel/eka/drivers/locmedia/locmedia.cpp	Fri Apr 16 16:24:37 2010 +0300
@@ -3615,15 +3615,19 @@
 void DPrimaryMediaBase::RequestCountInc()
 	{
 	__ASSERT_DEBUG(iBody, LOCM_FAULT());
-	TInt oldVal = (TInt) __e32_atomic_add_ord32(&iBody->iRequestCount, (TUint) 1);
-//Kern::Printf("RCINC: this %x cnt %d, old %d", this, iBody->iRequestCount, oldVal);
-	
-	OstTraceDefExt2( OST_TRACE_CATEGORY_RND, TRACE_DEMANDPAGING, DPRIMARYMEDIABASE_REQUESTCOUNTINC, "new count=%d; old count=%d", iBody->iRequestCount, oldVal );
-	
-	if (oldVal == 0 && iBody->iPagingDevice)
+	if (iBody->iPagingDevice)
 		{
-//Kern::Printf("RCINC: NotifyBusy()");
-		iBody->iPagingDevice->NotifyBusy();
+		NFastMutex* lock = iBody->iPagingDevice->NotificationLock();
+		NKern::FMWait(lock);
+		TInt oldVal = iBody->iRequestCount++;
+		//Kern::Printf("RCINC: this %x cnt %d, old %d", this, iBody->iRequestCount, oldVal);
+		OstTraceDefExt2( OST_TRACE_CATEGORY_RND, TRACE_DEMANDPAGING, DPRIMARYMEDIABASE_REQUESTCOUNTINC, "new count=%d; old count=%d", iBody->iRequestCount, oldVal );
+		if (oldVal == 0)
+			{
+			//Kern::Printf("RCINC: NotifyBusy()");
+			iBody->iPagingDevice->NotifyBusy();
+			}
+		NKern::FMSignal(lock);
 		}
 	}
 
@@ -3635,17 +3639,21 @@
 void DPrimaryMediaBase::RequestCountDec()
 	{
 	__ASSERT_DEBUG(iBody, LOCM_FAULT());
-	TInt oldVal = (TInt) __e32_atomic_add_ord32(&iBody->iRequestCount, (TUint) -1);
-//Kern::Printf("RCDEC: this %x cnt %d, old %d", this, iBody->iRequestCount, oldVal);
-	
-	OstTraceDefExt2( OST_TRACE_CATEGORY_RND, TRACE_DEMANDPAGING, DPRIMARYMEDIABASE_REQUESTCOUNTDEC, "new count=%d; old count=%d", iBody->iRequestCount, oldVal );
-	
-	if (oldVal == 1 && iBody->iPagingDevice)
+	if (iBody->iPagingDevice)
 		{
-//Kern::Printf("RCDEC: NotifyIdle()");
-		iBody->iPagingDevice->NotifyIdle();
+		NFastMutex* lock = iBody->iPagingDevice->NotificationLock();
+		NKern::FMWait(lock);
+		TInt oldVal = iBody->iRequestCount--;
+		//Kern::Printf("RCDEC: this %x cnt %d, old %d", this, iBody->iRequestCount, oldVal);
+		OstTraceDefExt2( OST_TRACE_CATEGORY_RND, TRACE_DEMANDPAGING, DPRIMARYMEDIABASE_REQUESTCOUNTDEC, "new count=%d; old count=%d", iBody->iRequestCount, oldVal );
+		if (oldVal == 1)
+			{
+			//Kern::Printf("RCDEC: NotifyIdle()");
+			iBody->iPagingDevice->NotifyIdle();
+			}		
+		NKern::FMSignal(lock);
+		__ASSERT_DEBUG(iBody->iRequestCount >= 0, LOCM_FAULT());
 		}
-	__ASSERT_DEBUG(iBody->iRequestCount >= 0, LOCM_FAULT());
 	}
 #endif	// __DEMAND_PAGING__
 
@@ -4947,8 +4955,10 @@
 
 		if (r != KErrNone)
 		    {
-            OstTrace1(TRACE_FLOW, LOCRV_REGISTERPAGINGDEVICE_EXIT9, "< retval=%d",r);
-			return r;
+            OstTrace1(TRACE_FLOW, LOCRV_REGISTERPAGINGDEVICE_EXIT9, "< Caps::retval=%d - return KErrNotSupported",r);
+            // Media driver failure; media maybe recoverable after boot.
+            // Can't register any page drives so return not supported.
+			return KErrNotSupported;
 		    }
 
 		TLocDrv* drive;
@@ -5012,7 +5022,7 @@
 	Kern::Printf("iRomPagingDriveNumber 0x%x\n", pagingDevice->iRomPagingDriveNumber);
 	Kern::Printf("iDataPagingDriveNumber 0x%x\n", pagingDevice->iDataPagingDriveNumber);
 	Kern::Printf("iSwapSize 0x%x\n", pagingDevice->iSwapSize);
-	#endif
+#endif
 
 
 	// This table is indexed by DPagingDevice::TType