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

[Robert P. J. Day]

On Sun, 1 Apr 2007, Miles Lane wrote:

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

because if you look at the source code for ipw2200.c in the kernel
source tree, the "led" module parameter is defined as read-only:

...
module_param(led, int, 0444);
MODULE_PARM_DESC(led, "enable led control on some systems (default 0 off)\n");
...

rday
-- 
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Robert P. J. Day
Linux Consulting, Training and Annoying Kernel Pedantry
Waterloo, Ontario, CANADA

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