[alsa-devel] Hardware-specific IOCTLs

Clemens Ladisch clemens at ladisch.de
Tue Jan 17 23:02:05 CET 2012

Ivan Bublikov wrote:
>> Ivan Bublikov wrote:
>>> My difficulty is how to define a code for my IOCTL and avoid
>>> a conflict with the common code in the future.
>> Pick something not yet allocated in Documentation/ioctl/ioctl-number.txt.
> Since half of the lines in it are marked "Conflict!" anyway, should
> I only pay attention to not conflict with "sound/*" lines?

There are enough free codes so that you do not need to introduce new

>  And then add a new line for my IOCTLs?


> And should I put my IOCTL definitions in hda_hwdep.h or create a new
> file?

If you go through the existing HDA hwdep device, your ioctls probably
should go into the same header.


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