From: Bert Wesarg <wesarg@informatik.uni-halle.de>
Date: Sat, 16 Apr 2005 22:25:42 +0000 (-0700)
Subject: [PATCH] kernel/param.c: don't use .max when .num is NULL in param_array_set()
X-Git-Tag: v2.6.12-rc3~119
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=31143a12044caa3521edafd736e3bc18c098d2fd;p=pandora-kernel.git

[PATCH] kernel/param.c: don't use .max when .num is NULL in param_array_set()

there seems to be a bug, at least for me, in kernel/param.c for arrays with
.num == NULL.  If .num == NULL, the function param_array_set() uses &.max
for the call to param_array(), wich alters the .max value to the number of
arguments.  The result is, you can't set more array arguments as the last
time you set the parameter.

example:

# a module 'example' with
# static int array[10] = { 0, };
# module_param_array(array, int, NULL, 0644);

$ insmod example.ko array=1,2,3
$ cat /sys/module/example/parameters/array
1,2,3
$ echo "4,3,2,1" > /sys/module/example/parameters/array
$ dmesg | tail -n 1
kernel: array: can take only 3 arguments

Signed-off-by: Bert Wesarg <wesarg@informatik.uni-halle.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---

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