Function argument is not having "len" anywhere;
"len" is later used in kfifo_{in|out}.
So here, it would be appropriate to say,
it copies @n bytes and not @len
Signed-off-by: Viral Mehta <viral.mehta@lntinfotech.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>