1 files changed, 7 insertions, 0 deletions

diff --git a/drivers/net/ixgb/ixgb_main.c b/drivers/net/ixgb/ixgb_main.c
index 960b44b5b02b..a5da48a1fca0 100644
--- a/drivers/net/ixgb/ixgb_main.c
+++ b/drivers/net/ixgb/ixgb_main.c
@@ -1174,6 +1174,7 @@ ixgb_tso(struct ixgb_adapter *adapter, struct sk_buff *skb)
         int err;
 
         if (likely(skb_is_gso(skb))) {
+                struct ixgb_buffer *buffer_info;
                 if (skb_header_cloned(skb)) {
                         err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
                         if (err)
@@ -1196,6 +1197,8 @@ ixgb_tso(struct ixgb_adapter *adapter, struct sk_buff *skb)
 
                 i = adapter->tx_ring.next_to_use;
                 context_desc = IXGB_CONTEXT_DESC(adapter->tx_ring, i);
+                buffer_info = &adapter->tx_ring.buffer_info[i];
+                WARN_ON(buffer_info->dma != 0);
 
                 context_desc->ipcss = ipcss;
                 context_desc->ipcso = ipcso;
@@ -1233,11 +1236,14 @@ ixgb_tx_csum(struct ixgb_adapter *adapter, struct sk_buff *skb)
         uint8_t css, cso;
 
         if(likely(skb->ip_summed == CHECKSUM_HW)) {
+                struct ixgb_buffer *buffer_info;
                 css = skb->h.raw - skb->data;
                 cso = (skb->h.raw + skb->csum) - skb->data;
 
                 i = adapter->tx_ring.next_to_use;
                 context_desc = IXGB_CONTEXT_DESC(adapter->tx_ring, i);
+                buffer_info = &adapter->tx_ring.buffer_info[i];
+                WARN_ON(buffer_info->dma != 0);
 
                 context_desc->tucss = css;
                 context_desc->tucso = cso;
@@ -1283,6 +1289,7 @@ ixgb_tx_map(struct ixgb_adapter *adapter, struct sk_buff *skb,
                 buffer_info = &tx_ring->buffer_info[i];
                 size = min(len, IXGB_MAX_DATA_PER_TXD);
                 buffer_info->length = size;
+                WARN_ON(buffer_info->dma != 0);
                 buffer_info->dma =
                         pci_map_single(adapter->pdev,
                                 skb->data + offset,