IPoIB: Check for DMA mapping error for TX packets

Signed-off-by: Roland Dreier <rolandd@cisco.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/drivers/infiniband/ulp/ipoib/ipoib_ib.c b/drivers/infiniband/ulp/ipoib/ipoib_ib.c
index f426a69d9a43..8bf5e9ec7c95 100644
--- a/drivers/infiniband/ulp/ipoib/ipoib_ib.c
+++ b/drivers/infiniband/ulp/ipoib/ipoib_ib.c
@@ -355,6 +355,11 @@ void ipoib_send(struct net_device *dev, struct sk_buff *skb,
         tx_req->skb = skb;
         addr = dma_map_single(priv->ca->dma_device, skb->data, skb->len,
                               DMA_TO_DEVICE);
+        if (unlikely(dma_mapping_error(addr))) {
+                ++priv->stats.tx_errors;
+                dev_kfree_skb_any(skb);
+                return;
+        }
         pci_unmap_addr_set(tx_req, mapping, addr);
 
         if (unlikely(post_send(priv, priv->tx_head & (ipoib_sendq_size - 1),