* Fixed a possible dead lock between the kernel daemon and the DDM; the media

status checker now only tries to lock the manager, it won't wait anymore.
* Added MediaChanged() and UpdateMediaStatusIfNeeded() methods to KDiskDevice.
* KDiskDeviceManager::_CheckMediaStatus() now uses these new methods; it should
  no longer detect removed media more than once :-)


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22621 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/system/kernel/disk_device_manager/KDiskDevice.cpp

@@ -239,9 +239,26 @@ KDiskDevice::IsRemovable() const
 bool
 KDiskDevice::HasMedia() const
 {
-	return (fMediaStatus == B_OK);
+	return fMediaStatus == B_OK || fMediaStatus == B_DEV_MEDIA_CHANGED;
 }
 
+
+bool
+KDiskDevice::MediaChanged() const
+{
+	return fMediaStatus == B_DEV_MEDIA_CHANGED;
+}
+
+
+void
+KDiskDevice::UpdateMediaStatusIfNeeded()
+{
+	// TODO: allow a device to notify us about its media status!
+	// This will then also need to clear any B_DEV_MEDIA_CHANGED
+	GetMediaStatus(&fMediaStatus);
+}
+
+
 // SetPath
 status_t
 KDiskDevice::SetPath(const char *path)