On Thu, Mar 09, 2017 at 09:40:49AM -0800, Alison Schofield wrote: > On Thu, Mar 09, 2017 at 09:36:54AM -0800, Alison Schofield wrote: > > On Thu, Mar 09, 2017 at 04:59:39PM +0100, miguel.robles@xxxxxxxxxx wrote: > > > On 2017-03-09 16:41, Daniel Baluta wrote: > > > >On Thu, Mar 9, 2017 at 4:34 PM, Miguel Robles <miguel.robles@xxxxxxxxxx> > > > >wrote: > > > >>Hello all, > > > >> > > > >>I am beginning with Linux Kernel development. So I am trying to make > > > >>the IIO tasks posted on kernelnewbies DOT org. > > > >>But I got stuck with this problem that I am describing you hereafter > > > >>hoping that someone could bring me any feedback. > > > >> > > > >>Many thanks, > > > >>Miguel ROBLES > > > >> > > > >>---------- > > > >>DESCRIPTION > > > >>----------- > > > >> > > > >>After loading the corresponding IIO modules and mountig the configfs > > > >>filesystem > > > >>I can not create an instance device with mkdir using the command: > > > >> > > > >>$ sudo mkdir /config/iio/devices/dummy/my_dummy_device > > > >>Killed > > > >> > > > >>I get the "Killed" message and looking at my syslog file, I got the > > > >>warning > > > >>"refcount_t: increment on 0; use-after-free" followed by an "Oops" > > > >>message. > > > >>When trying to execute the command one more time, the execution never > > > >>finishes. > > > >> > > > >> > > > >>------ > > > >>CONTEXT > > > >>------- > > > >> > > > >>- Tried on 2 linux kernel releases: > > > >> - kernel: 4.10 (commit: 4977ab6) > > > >> - Kernel: 4.11 (commit: ec3b93a) > > > >> > > > >>- Compiled with config file including the following options for IIO: > > > >> > > > >># > > > >># IIO dummy driver > > > >># > > > >>CONFIG_IIO_DUMMY_EVGEN=m > > > >>CONFIG_IIO_SIMPLE_DUMMY=m > > > >>CONFIG_IIO_SIMPLE_DUMMY_EVENTS=y > > > >>CONFIG_IIO_SIMPLE_DUMMY_BUFFER=y > > > >> > > > >>CONFIG_IIO_CONFIGFS=m > > > > > > > >Do you also have CONFIG_IIO_SW_DEVICE right? > > > > > > Yes, and the value is: CONFIG_IIO_SW_DEVICE=m. > > > > > > Thank you, > > > Miguel > > > > > > > >Will try to have a look at this asap. > > > > > > > > > > > >thanks, > > > >Daniel. > > > > Daniel, > > You probably saw, but just in case... > > I verified that the process, including the above mkdir, is working on > > 4.10-rc3. (So, I'm relieved the Outreachy applicants won't start > > hitting it.) > > alisons > > I see Lars' patch! > It worked for me because I used CONFIG_IIO_CONFIGFS built-in. > alisons > I applied Lar's patch and now the command is working fine! Even if I do not understand very well the patch. I mean, I always declared CONFIG_IIO_CONFIGFS, so the code should be normally always compiled. Miguel > > > > > > > > > -- > > > To unsubscribe from this list: send the line "unsubscribe linux-iio" in > > > the body of a message to majordomo@xxxxxxxxxxxxxxx > > > More majordomo info at http://vger.kernel.org/majordomo-info.html > -- > To unsubscribe from this list: send the line "unsubscribe linux-iio" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-iio" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
