On Mon, Mar 28, 2016 at 3:32 PM, Okash Khawaja <okash.khawaja@xxxxxxxxx> wrote: > Hi, > > I'm writing a i2c device driver. In probe(), among other things I call: > > polled_input = input_allocate_polled_device(); > input_register_polled_device(polled_input); > > Then inside remove(), I extract the instance of input_polled_dev and > call > > input_unregister_polled_device(polled_input); > > This results in kernel error: > > "Unable to handle kernel NULL pointer dereference at virtual address > 00000474". > > It turns out that the input_dev pointer inside input_polled_dev is null > which leads to this error. But why is input_dev pointer null? It is not > null inside probe() function and I don't release it anywhere. > > This is code: http://pastebin.com/JJdepyEG and here is link to the output, > along with my log statements: http://pastebin.com/badwSvyy. > input_free_polled_device(polled_input) is always called in your probe function. -- Carlo Caione _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
