Staging: lustre: lproc_osc: Add check on a variable

Variable rc is not tested for negative values and hence a check should
be included. Also, a check for variable val should be introduced.
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

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