partial_len
unsigned int partial_len;
sg->partial_len = len;
rslt->residue += (total - sg->partial_len);
if (sg->partial_len)
sg->partial_len) {
len = dev->partial_len + dev->partial_rem;
dev->partial_len);
memcpy(skb2->data + dev->partial_len, skb->data,
dev->partial_len = skb->len;
dev->partial_len);