/* create our private serial structure */
mos7720_serial = kzalloc(sizeof(struct moschip_serial), GFP_KERNEL);
if (mos7720_serial == NULL) {
/* create our private serial structure */
mos7720_serial = kzalloc(sizeof(struct moschip_serial), GFP_KERNEL);
if (mos7720_serial == NULL) {