Nothing returns false.

stepmania/src/archutils/Darwin/HIDDevice.cpp

@@ -55,12 +55,7 @@ bool HIDDevice::Open( io_object_t device )
 		vid = 0;
 	if( !IntValue(pidRef, pid) )
 		pid = 0;
-	
-	if( !SupportsVidPid(vid, pid) )
-	{
-		CFRelease( properties );
-		return false;
-	}
+	InitDevice( vid, pid );
 	
 	if( object && CFGetTypeID(object) == CFStringGetTypeID() )
 		m_sDescription = CFStringGetCStringPtr( CFStringRef(object), CFStringGetSystemEncoding() );

stepmania/src/archutils/Darwin/HIDDevice.h

@@ -73,9 +73,9 @@ protected:
 	virtual void Open() = 0;
 	
 	/*
-	 * Optional. Subclasses can return false if they do not support the (vid, pid) pair.
+	 * Optional. Subclasses can initialize the device, if required.
 	 */
-	virtual bool SupportsVidPid( int vid, int pid ) { return true; }
+	virtual void InitDevice( int vid, int pid ) { }
 	
 	// This adds the element with the given cookie to the queue to be notified of state changes.
 	inline void AddElementToQueue( int cookie )

stepmania/src/archutils/Darwin/JoystickDevice.cpp

@@ -120,17 +120,17 @@ void JoystickDevice::Open()
 			AddElementToQueue( j->first );
 	}
 }
-bool JoystickDevice::SupportsVidPid( int vid, int pid )
+
+void JoystickDevice::InitDevice( int vid, int pid )
 {
 	if( vid != 0x0507 || pid != 0x0011 )
-		return true;
+		return;
 	// It's a Para controller so try to power it on.
 	uint8_t powerOn = 1;
 	IOReturn ret = SetReport( kIOHIDReportTypeFeature, 0, &powerOn, 1, 10 );
 	
 	if( ret )
 		LOG->Warn( "Failed to power on the Para controller: %#08x", ret );
-	return true;
 }
 
 void JoystickDevice::GetButtonPresses( vector<DeviceInput>& vPresses, int cookie, int value, const RageTimer& now ) const

stepmania/src/archutils/Darwin/JoystickDevice.h

@@ -28,7 +28,7 @@ protected:
 	bool AddLogicalDevice( int usagePage, int usage );
 	void AddElement( int usagePage, int usage, int cookie, const CFDictionaryRef properties );
 	void Open();
-	bool SupportsVidPid( int vid, int pid );
+	void InitDevice( int vid, int pid );
 	
 public:
 	void GetButtonPresses( vector<DeviceInput>& vPresses, int cookie, int value, const RageTimer& now ) const;