Need some pointers, want to change portions of saa7134-input.c to filter out 0x80000000 events (key up)

Well as the subject says I need some pointers to the relevant portion ofcode which generates events in /dev/input/eventN. The reason I amlooking to change the code is so that I can mask out the second eventthat always shows up after a button press, what I believe to be thebutton up event. The reason I wish to do this is that, as I've mentionedbefore, this second event stays on the top of the stack and is readinstead of the real button code the next time a button is pressed - longstory short, this particular behaviour does not work very well at allwith lirc and I would like to remove it from the code.

I can see that there's a keypress mask being AND'ed to the input key. Ipresume that this is to distinguish the button down event and togenerate an event when this AND mask produces a non-zero result.Unfortunately the code will still end up being output (guessing here) ifit doesn't fit the mask - there just isn't a keydown event to go withit. Guess what happens the next time a program gets a signal and wantsto read the input? Right, you get a bogus event instead of the real one,and the NEXT time an event is generated, the previous button press is atthe top of the buffer.

My question then is simply what the easiest and/or future-proof way offiltering out *all* codes that do not match the bitpattern (or which DOmask the bitpattern, depending on polarity) from appearing in/dev/input? Help me with this and I'm home free (I hope) - this is theonly real issue that remains in my setup before everything works the wayit should.


Cheers,

Ole Andre