~kernel/driver message

[Sebastian Matkovich <sebastian.matkovich@gmail.com>]

hey, does this kernel message say you anything? kernel: gpib: need to hold board lock to perform ioctl; i found the sourcecode writing this: if( current->pid != board->locking_pid )
{
printk( "gpib: need to hold board lock to perform ioctl %i\n",
cmd & 0xff );
retval = -EPERM;
goto done;
}

what i try is to build device support for a powersupply connected through a gpib interface.
someone told me it might be because two different processes try to access the board, or maybe it isn't accessed by root (but i executed the ioc as root), has anyone got an idea?^^