[PATCH 2.6.10-rc1 1/15] driver-model: param_array_set num field fix

[Tejun Heo <tj@home-tj.org>]

 dp_01_param_array_bug.patch

 This is the 1st patch of 15 patches for devparam.

 This patches fixes param_array_set() to not use arr->max as nump
argument of param_array.  If arr->max is used as nump and the
configuration variable is exported writeable in the syfs, the size of
the array will be limited by the smallest number of elements
specified.  One side effect is that as the actual number of elements
is not recorded anymore when nump is NULL, all elements should be
printed when referencing the corresponding sysfs node.  I don't think
that will cause any problem.


Signed-off-by: Tejun Heo <tj@home-tj.org>


Index: linux-export/kernel/params.c
===================================================================
--- linux-export.orig/kernel/params.c	2004-11-04 10:25:51.000000000 +0900
+++ linux-export/kernel/params.c	2004-11-04 11:04:07.000000000 +0900
@@ -305,9 +305,10 @@ int param_array(const char *name,
 int param_array_set(const char *val, struct kernel_param *kp)
 {
 	struct kparam_array *arr = kp->arg;
+	unsigned int t;
 
 	return param_array(kp->name, val, 1, arr->max, arr->elem,
-			   arr->elemsize, arr->set, arr->num ?: &arr->max);
+			   arr->elemsize, arr->set, arr->num ?: &t);
 }
 
 int param_array_get(char *buffer, struct kernel_param *kp)