Hi Jeff,

	Patch against 2.6-test6.

	- lmc_ioctl was calling copy_{from|to}_user with the device lock 
held, replace it with finer-grained locking;

	- Remove check_version usage;

	- If copy_from_user fails, returns -EFAULT instead of -ENOMEM;

	I didn't acquire the device lock before calling lmc_proto_ioctl, 
which will call syncppp ioctls, which will might call 
copy_{to|from}_user, but I think the locking shouldn't be done on that 
layer of the driver. (maybe on lmc_proto_main?)

	I'm not sure I locked everywhere I was suppose to lock, please review.

	If it looks ok, please consider applying,

	Thanks.

Felipe