[yocto] systemd - how do I wait for a driver to load?

[Chris Tapp]

On 26 Aug 2014, at 21:02, Sven Ebenfeld <sven.ebenfeld at gmail.com> wrote:

> You should look at  "ConditionPathExists=" Options of systemd-units.

Thanks, that looks like it would do the job. I was hoping not to hard code paths as they may change if a configuration file is changed, but...

> Otherwise if udev is loading your device module, you could add the
> device-unit to "Requires=" option.

This sounds better. Is there an easy way to tell if udev did load the module? There's nothing obvious in the syslog.

> Am 26.08.2014 21:52, schrieb Chris Tapp:
>> I've got a service running under systemd that will only start once a kernel module has loaded and created its /dev/dvb/adaptor nodes.
>> 
>> Unfortunately, it doesn't load until after the service has failed and gone into an error state due to too many restarts.
>> 
>> I could "fix" this by increasing the restart interval, but is there a way of adding a dependancy on the kernel module?
>> 
>> --
>> 
>> Chris Tapp
>> opensource at keylevel.com
>> www.keylevel.com
>> 
>> 
>> 
>> 

--

Chris Tapp
opensource at keylevel.com
www.keylevel.com