Why can't root write to /sys/module/ipw2200/parameters/led?

From: "Miles Lane" <miles lane gmail com>
To: "For testers of Fedora Core development releases" <fedora-test-list redhat com>
Subject: Why can't root write to /sys/module/ipw2200/parameters/led?
Date: Sun, 1 Apr 2007 13:54:19 -0700

[root hogwarts ~]# echo 1 > /sys/module/ipw2200/parameters/led
-bash: /sys/module/ipw2200/parameters/led: Permission denied

Follow-Ups:
- Re: Why can't root write to /sys/module/ipw2200/parameters/led?
  - From: Robert P. J. Day