On Mon, Sep 17, 2012 at 04:45:15PM -0600, Shuah Khan wrote: > Yeah. I will firm up my ideas a bit and summarize in a day or two. Would > like to hear your ideas as well at that time, so we can pick the one > that works the best. I think the best approach for this functionality is to add a flag to 'struct dma_debug_entry' which tells whether the address has been checked with dma_mapping error or not. On unmap or driver unload you can then check for that flag and print a warning when an unchecked address is detected. Joerg -- AMD Operating System Research Center Advanced Micro Devices GmbH Einsteinring 24 85609 Dornach General Managers: Alberto Bozzo Registration: Dornach, Landkr. Muenchen; Registerger. Muenchen, HRB Nr. 43632 _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/devel