> On 28 Mar 2016, at 14:55, Carlo Caione <carlo@xxxxxxxxxx> wrote: > >> 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. Of course! Thanks very much > > > -- > Carlo Caione _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
