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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>
steinar/wifi_calib_4_9_kernel
David Woodhouse 2015-09-23 09:44:38 +01:00 committed by David S. Miller
parent 26b0bad6ac
commit a3b804043f
1 changed files with 10 additions and 12 deletions
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22
drivers/net/ethernet/realtek/8139cp.c
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@ -790,7 +790,7 @@ static netdev_tx_t cp_start_xmit (struct sk_buff *skb,
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 @@ static netdev_tx_t cp_start_xmit (struct sk_buff *skb,
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 @@ static netdev_tx_t cp_start_xmit (struct sk_buff *skb,
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",