IRDA_ASSERT(self != NULL, return -EFAULT;);
IRDA_ASSERT(self->magic == IRCOMM_MAGIC, return -EFAULT;);
IRDA_ASSERT(skb != NULL, return -EFAULT;);
IRDA_ASSERT(self != NULL, return -EFAULT;);
IRDA_ASSERT(self->magic == IRCOMM_MAGIC, return -EFAULT;);
IRDA_ASSERT(skb != NULL, return -EFAULT;);