netdev - [PATCH 3/3] e1000e: Add missing dma_mapping_error-call in e1000_alloc_jumbo_rx

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Message-Id: <1363429925-12724-4-git-send-email-christoph.paasch@uclouvain.be>
Date:	Sat, 16 Mar 2013 11:32:05 +0100
From:	Christoph Paasch <christoph.paasch@...ouvain.be>
To:	Jeff Kirsher <jeffrey.t.kirsher@...el.com>,
	Bruce Allan <bruce.w.allan@...el.com>,
	Alex Duyck <alexander.h.duyck@...el.com>
Cc:	e1000-devel@...ts.sourceforge.net, netdev@...r.kernel.org,
	David Miller <davem@...emloft.net>
Subject: [PATCH 3/3] 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@...ouvain.be>
---
 drivers/net/ethernet/intel/e1000e/netdev.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/intel/e1000e/netdev.c b/drivers/net/ethernet/intel/e1000e/netdev.c
index 142ca39..5706dcd 100644
--- a/drivers/net/ethernet/intel/e1000e/netdev.c
+++ b/drivers/net/ethernet/intel/e1000e/netdev.c
@@ -846,11 +846,16 @@ 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);
-- 
1.8.1.227.g44fe835

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