Hi, I've finally applied most of this. However, I made some significant changes to how the feature is advertised to userspace to simplify the code; I also made some other changes all over, please check the patch I inserted in the middle and the rebase of the others. I also didn't apply the last patch so please respin that with the new code, but I don't like the fact that the driver needs to free the buffer there - please find a different solution for that. johannes