nf_register_hook

[aksingh@xxxxxxxxxxx]

Hi,

  It seems nf_register_hook can return a -ve value too, I looked at the
function source that wlays returns 0,  but in some cases(i dont know what
they are) -ve value is also returned, when does this happen ?? At a lot of
places in the kernel the return value for nf_register_hook is checked to
see if it is less than zero ??

thanks
Amit