[yocto] Blacklisting drivers in poky or in yocto project

[Bruce Ashfield]

On 2014-05-01, 2:24 PM, Sudhangathan B S wrote:
> The Update:
> I blacklisted all related drivers, i.e., libertas, libertas_sdio,
> cfg80211 and ipv6, but still all these driver modules got autoloaded..!!
>
> The method I used: in the file /etc/modprobe.d/blacklist.conf, i added
> these following lines:
> blacklist ipv6
> blacklist cfg80211
> blacklist libertas
> blacklist libertas_sdio

I can't recall if yocto 1.4 had switched to kmod, or if it was still
the legacy mod-utils ? Can you confirm with one is in play here ?

>
> I also tried the same in /lib/modprobe.d/blacklist.conf, but to no
> avail. Every time the modules were getting autoloaded..!!!

Have you looked for /etc/modules ? Or any other references to them
on the filesystem ?

>
> And also where can I look for this autoload feature..?

I'm not familiar with the kernel you are using, but have you confirmed
that either hotplug events or uevents and a helper are not being
triggered and loading the modules ?

Bruce

>
> Best,
>
>
>
> ---------------------------------
> Sudhangathan BS
> Ph:(+91) 9731-905-205
> ---------------------------------
>
>
> On Thu, May 1, 2014 at 1:46 AM, Sudhangathan B S <sudhangathan at gmail.com
> <mailto:sudhangathan at gmail.com>> wrote:
>
>     Yes i confirm the loading of modules everytime using lsmod.
>
>     I'm using the standard installation of yocto project from Gumstix
>     Repo, and also the PM branch kernel from Kevin Hilman's repo. Kernel
>     version is 3.4. So i did not specify autoloading of modules anywhere.
>
>     A grep of module_autoload showed kernel-module-split.bbclass as a
>     reference. Is this the file you are talking about..? It will be good
>     to know if it is because this module_autoload..!!
>
>     And moreover I now have a doubt if the blaclisting is not working
>     because of the dependencies. I will reply again after blacklisting
>     all related drivers. Esp. the cfg802 driver.
>
>     Thanks Bruce,
>
>     Sudhangathan BS.
>
>     Working on a MMX Android 110.
>     --If you have not travelled, you have not lived.
>
>     On 30-Apr-2014 6:57 PM, "Bruce Ashfield"
>     <bruce.ashfield at windriver.com <mailto:bruce.ashfield at windriver.com>>
>     wrote:
>      >
>      > On 14-04-30 03:40 AM, Sudhangathan B S wrote:
>      >>
>      >> Hi all,
>      >>
>      >> I need to prevent my wifi drivers auto loading during boot time.
>     How do
>      >> we do it in the Poky OS or in the Yocto project..?
>      >
>      >
>      > Are you actually seeing a confirmed auto load of modules ?
>      >
>      > In a standard image kernel modules will not be autoloaded unless
>      > specifically requested via a recipe with :
>     module_autoload_<module name>.
>      >
>      > I'm not talking about a usermode helper / on demand load, but
>      > an explicit autoload + dependencies.
>      >
>      > Bruce
>      >
>      >
>      >
>      >
>      >>
>      >> I tried both the fedora way and debian way, neither worked.!
>     this is as
>      >> given in this website..:
>      >>
>     http://www.cyberciti.biz/tips/avoid-linux-kernel-module-driver-autoloading.html
>      >>
>      >>
>      >> I'm using gumstix overo hardware..! Poky version 9.0.2, Yocto
>     Project
>      >> 1.4 Reference Distro, 1.4.2 overo.
>      >>
>      >>
>      >> ---------------------------------
>      >> Sudhangathan BS
>      >> Ph:(+91) 9731-905-205 <tel:%28%2B91%29%209731-905-205>
>      >> ---------------------------------
>      >>
>      >>
>      >
>
>
>
>