Staging: lustre: lproc_osc: Change the variable to be checked

The variable rc is supposed to hold the value returned by function
kstrtoul which can either be 0, -EINVAL (-22) or -ERANGE (-34).
Therefore, the check must be performed on rc instead of val for error
values. Also, rc can never be greater than 0.
Signed-off-by: Shivani Bhardwaj <shivanib134@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/lustre/lustre/osc/lproc_osc.c

@@ -61,9 +61,7 @@ static ssize_t active_store(struct kobject *kobj, struct attribute *attr,
 	unsigned long val;
 
 	rc = kstrtoul(buffer, 10, &val);
-	if (rc)
-		return rc;
-	if (val < 0 || val > 1)
+	if (rc < 0)
 		return -ERANGE;
 
 	/* opposite senses */