diff options
| author | Anton Blanchard <anton@samba.org> | 2010-02-19 17:54:53 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-02-23 01:24:59 -0800 |
| commit | b5abb028e214cca68f4231d4f3bc0847ddbc986e (patch) | |
| tree | 1ff65ef5395914b6b5e9f77b7cd550cebc7dc20f | |
| parent | 242cc0547f3bcecc0b02ca6f3e9512760185727e (diff) | |
| download | kernel_samsung_aries-b5abb028e214cca68f4231d4f3bc0847ddbc986e.zip kernel_samsung_aries-b5abb028e214cca68f4231d4f3bc0847ddbc986e.tar.gz kernel_samsung_aries-b5abb028e214cca68f4231d4f3bc0847ddbc986e.tar.bz2 | |
e1000: Fix DMA mapping error handling on RX
Check for error return from pci_map_single/pci_map_page and clean up.
With this and the previous patch the driver was able to handle a significant
percentage of errors (I set the fault injection rate to 10% and could still
download large files at a reasonable speed).
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/net/e1000/e1000_main.c | 19 |
1 files changed, 18 insertions, 1 deletions
diff --git a/drivers/net/e1000/e1000_main.c b/drivers/net/e1000/e1000_main.c index d29bb53..7655436 100644 --- a/drivers/net/e1000/e1000_main.c +++ b/drivers/net/e1000/e1000_main.c @@ -4006,11 +4006,21 @@ check_page: } } - if (!buffer_info->dma) + if (!buffer_info->dma) { buffer_info->dma = pci_map_page(pdev, buffer_info->page, 0, buffer_info->length, PCI_DMA_FROMDEVICE); + if (pci_dma_mapping_error(pdev, buffer_info->dma)) { + put_page(buffer_info->page); + dev_kfree_skb(skb); + buffer_info->page = NULL; + buffer_info->skb = NULL; + buffer_info->dma = 0; + adapter->alloc_rx_buff_failed++; + break; /* while !buffer_info->skb */ + } + } rx_desc = E1000_RX_DESC(*rx_ring, i); rx_desc->buffer_addr = cpu_to_le64(buffer_info->dma); @@ -4101,6 +4111,13 @@ map_skb: skb->data, buffer_info->length, PCI_DMA_FROMDEVICE); + if (pci_dma_mapping_error(pdev, buffer_info->dma)) { + dev_kfree_skb(skb); + buffer_info->skb = NULL; + buffer_info->dma = 0; + adapter->alloc_rx_buff_failed++; + break; /* while !buffer_info->skb */ + } /* * XXX if it was allocated cleanly it will never map to a |