IPoIB: Check for DMA mapping error for TX packets

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

diff --git a/drivers/infiniband/ulp/ipoib/ipoib_ib.c b/drivers/infiniband/ulp/ipoib/ipoib_ib.c
index f426a69d9a436cce55addba00be1d1d2cdd7ff30..8bf5e9ec7c9522345696a2819ee99f444af341e7 100644 (file)
--- 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),