Hi! There seem to be a general error in a lot of dvb bride drivers about the order of i2c_unregister_device and the calls to dvb_unregister_frontend and dvb_frontend_detach.
As soon as the i2c_client for a demod driver is unregistered the memory for the frontend is kfreed. But the calls to dvb_unregister_frontend and dvb_frontend_detach access it later. I fixed the error in cx23885 and cx231xx driver as I have access to the hardware. Further drivers that might show the same bug (but I cannot test): * em28xx * ddbride * saa7164 Regards Matthias
