e1000e: Add missing dma_mapping_error-call in e1000_alloc_jumbo_rx_buffers

After dma_map_page, dma_mapping_error must be called. It seems safe to
not free the skb/page allocated in this function, as the skb/page can be
reused later.

Signed-off-by: Christoph Paasch <christoph.paasch@uclouvain.be>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

diff --git a/drivers/net/ethernet/intel/e1000e/netdev.c b/drivers/net/ethernet/intel/e1000e/netdev.c
index 948b86ffa4f027753eec3f5b57b45b90277947ab..7e615e2bf7e6a4e96971945d33e3e332301e88bb 100644 (file)
--- a/drivers/net/ethernet/intel/e1000e/netdev.c
+++ b/drivers/net/ethernet/intel/e1000e/netdev.c
@@ -848,11 +848,16 @@ check_page:
                        }
                }
 
-               if (!buffer_info->dma)
+               if (!buffer_info->dma) {
                        buffer_info->dma = dma_map_page(&pdev->dev,
                                                        buffer_info->page, 0,
                                                        PAGE_SIZE,
                                                        DMA_FROM_DEVICE);
+                       if (dma_mapping_error(&pdev->dev, buffer_info->dma)) {
+                               adapter->alloc_rx_buff_failed++;
+                               break;
+                       }
+               }
 
                rx_desc = E1000_RX_DESC_EXT(*rx_ring, i);
                rx_desc->read.buffer_addr = cpu_to_le64(buffer_info->dma);