Problem in First-Patch-Tutorial

[Lino Sanfilippo]

Hi,

On 12.03.2017 13:15, SIMRAN SINGHAL wrote:
> On Sun, Mar 12, 2017 at 4:04 PM, Varsha Rao <rvarsha016 at gmail.com> wrote:
>> Hello Simran,
>>
>>> In Reloading Modules I tried the first command it works fine for me.
>>>
>>> git/kernels/staging$ ls drivers/iio/dummy/*.ko
>>> drivers/iio/dummy/iio_dummy_evgen.ko  drivers/iio/dummy/iio_dummy.ko
>>>
>>> Then I tried to run second-command
>>>
>>> git/kernels/staging$ sudo modprobe -r iio_dummy_evgen
>>>
>>> I got the following error:-
>>> modprobe: FATAL: Module iio_dummy_evgen not found.
>>
>>   Maybe as iio_dummy_evgen is not loaded it causes this error.
>>
>>> I am not getting what is wrong with this.
>>
>> You need to execute commands in following order
>>
>> make drivers/iio/dummy/iio_dummy_evgen.ko
>> make drivers/iio/dummy/iio_dummy.ko
>>
>> sudo modprobe iio_dummy_evgen
>> sudo modprobe iio_dummy
>>
>> Check if they are loaded successfully with lsmod | grep "iio".
>>
>> Thanks,
>> Varsha
> 
> This is also not working. I am getting this error now:
> modprobe: FATAL: Module iio_dummy_evgen not found in directory
> /lib/modules/4.10.0-rc3+
> 
> I am basically trying to do the Task1 of IIO. Here is the link:-
> https://kernelnewbies.org/IIO_tasks
> 
> In this task they have asked to use this:
> $ insmod iio_dummy_evgen.ko
> 
> As this was not working, so I tried modprobe.
> 


modprobe is just a wrapper around insmod. So if insmod does not work, modprobe wont either.
Could it be that the kernel you build the module for is not the kernel that you are currently
running? 

Regards,
Lino