[PATCH net-next] liquidio: Avoid accessing skb after submitting to input queue

[Felix Manlunas]

From: Satanand Burla <satananda.bu...@cavium.com>

Accessing skb after submitting to input queue can cause
access to stale pointers if the skb ends up being transmitted
and freed by that time.

Signed-off-by: Satanand Burla <satananda.bu...@cavium.com>
Signed-off-by: Derek Chickles <derek.chick...@cavium.com>
Signed-off-by: Raghu Vatsavayi <raghu.vatsav...@cavium.com>
Signed-off-by: Felix Manlunas <felix.manlu...@cavium.com>
---
 drivers/net/ethernet/cavium/liquidio/lio_main.c    | 6 +++---
 drivers/net/ethernet/cavium/liquidio/lio_vf_main.c | 6 +++---
 2 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/drivers/net/ethernet/cavium/liquidio/lio_main.c 
b/drivers/net/ethernet/cavium/liquidio/lio_main.c
index 5ee3f00..9261ddc 100644
--- a/drivers/net/ethernet/cavium/liquidio/lio_main.c
+++ b/drivers/net/ethernet/cavium/liquidio/lio_main.c
@@ -3316,11 +3316,11 @@ static int liquidio_xmit(struct sk_buff *skb, struct 
net_device *netdev)
 
        netif_trans_update(netdev);
 
-       if (skb_shinfo(skb)->gso_size)
-               stats->tx_done += skb_shinfo(skb)->gso_segs;
+       if (tx_info->s.gso_segs)
+               stats->tx_done += tx_info->s.gso_segs;
        else
                stats->tx_done++;
-       stats->tx_tot_bytes += skb->len;
+       stats->tx_tot_bytes += ndata.datasize;
 
        return NETDEV_TX_OK;
 
diff --git a/drivers/net/ethernet/cavium/liquidio/lio_vf_main.c 
b/drivers/net/ethernet/cavium/liquidio/lio_vf_main.c
index e96cf6c..a6587d7 100644
--- a/drivers/net/ethernet/cavium/liquidio/lio_vf_main.c
+++ b/drivers/net/ethernet/cavium/liquidio/lio_vf_main.c
@@ -2433,11 +2433,11 @@ static int liquidio_xmit(struct sk_buff *skb, struct 
net_device *netdev)
 
        netif_trans_update(netdev);
 
-       if (skb_shinfo(skb)->gso_size)
-               stats->tx_done += skb_shinfo(skb)->gso_segs;
+       if (tx_info->s.gso_segs)
+               stats->tx_done += tx_info->s.gso_segs;
        else
                stats->tx_done++;
-       stats->tx_tot_bytes += skb->len;
+       stats->tx_tot_bytes += ndata.datasize;
 
        return NETDEV_TX_OK;