Il 25/07/2012 09:03, Stefan Hajnoczi ha scritto: > From: Liu Ping Fan <pingf...@linux.vnet.ibm.com> > > iohandler/bh/timer may use DeviceState when its refcnt=0,
It's not clear how to me. The only reference to devices from an iohandler/bh/timer can be in the opaque. Now, if you have a iohandler/bh/timer whose opaque is a DeviceState, you should bump the refcount before setting it up, and unref after tearing it down. See for example how hw/scsi-disk.c bumps the refcount of a request before starting asynchronous I/O and calls unref at the end of the asynchronous I/O callback. Paolo
