8139cp: Fix TSO/scatter-gather descriptor setup
When sending a TSO frame in multiple buffers, we were neglecting to set
the first descriptor up in TSO mode.
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/ethernet/realtek/8139cp.c b/drivers/net/ethernet/realtek/8139cp.c
index cbca0de..75a8cee 100644
--- a/drivers/net/ethernet/realtek/8139cp.c
+++ b/drivers/net/ethernet/realtek/8139cp.c
@@ -790,7 +790,7 @@
entry, skb->len);
} else {
struct cp_desc *txd;
- u32 first_len, first_eor;
+ u32 first_len, first_eor, ctrl;
dma_addr_t first_mapping;
int frag, first_entry = entry;
const struct iphdr *ip = ip_hdr(skb);
@@ -810,7 +810,6 @@
for (frag = 0; frag < skb_shinfo(skb)->nr_frags; frag++) {
const skb_frag_t *this_frag = &skb_shinfo(skb)->frags[frag];
u32 len;
- u32 ctrl;
dma_addr_t mapping;
entry = NEXT_TX(entry);
@@ -858,20 +857,19 @@
txd->addr = cpu_to_le64(first_mapping);
wmb();
- if (skb->ip_summed == CHECKSUM_PARTIAL) {
+ ctrl = first_eor | first_len | FirstFrag | DescOwn;
+ if (mss)
+ ctrl |= LargeSend | ((mss & MSSMask) << MSSShift);
+ else if (skb->ip_summed == CHECKSUM_PARTIAL) {
if (ip->protocol == IPPROTO_TCP)
- txd->opts1 = cpu_to_le32(first_eor | first_len |
- FirstFrag | DescOwn |
- IPCS | TCPCS);
+ ctrl |= IPCS | TCPCS;
else if (ip->protocol == IPPROTO_UDP)
- txd->opts1 = cpu_to_le32(first_eor | first_len |
- FirstFrag | DescOwn |
- IPCS | UDPCS);
+ ctrl |= IPCS | UDPCS;
else
BUG();
- } else
- txd->opts1 = cpu_to_le32(first_eor | first_len |
- FirstFrag | DescOwn);
+ }
+
+ txd->opts1 = cpu_to_le32(ctrl);
wmb();
netif_dbg(cp, tx_queued, cp->dev, "tx queued, slots %d-%d, skblen %d\n",