redonkable/alistair23-linux
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tg3: Add more PCI DMA map error checking

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This patch adds code to check the status of pci_map_single() before
allowing rx buffers to be used.  It also converts the pci_map_single()
call in tg3_run_loopback() to use skb_dma_map() instead.

Signed-off-by: Matt Carlson <mcarlson@broadcom.com>
Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: Benjamin Li <benli@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Matt Carlson 2009-11-02 14:25:31 +00:00 committed by David S. Miller
parent 52cdf8526f
commit a21771dd18
1 changed files with 11 additions and 3 deletions
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14
drivers/net/tg3.c
View file

@ -4426,6 +4426,10 @@ static int tg3_alloc_rx_skb(struct tg3_napi *tnapi, u32 opaque_key,
mapping = pci_map_single(tp->pdev, skb->data, skb_size,
PCI_DMA_FROMDEVICE);
if (pci_dma_mapping_error(tp->pdev, mapping)) {
dev_kfree_skb(skb);
return -EIO;
}
map->skb = skb;
pci_unmap_addr_set(map, mapping, mapping);
@ -10369,7 +10373,10 @@ static int tg3_run_loopback(struct tg3 *tp, int loopback_mode)
for (i = 14; i < tx_len; i++)
tx_data[i] = (u8) (i & 0xff);
map = pci_map_single(tp->pdev, skb->data, tx_len, PCI_DMA_TODEVICE);
if (skb_dma_map(&tp->pdev->dev, skb, DMA_TO_DEVICE)) {
dev_kfree_skb(skb);
return -EIO;
}
tw32_f(HOSTCC_MODE, tp->coalesce_mode | HOSTCC_MODE_ENABLE |
rnapi->coal_now);
@ -10380,7 +10387,8 @@ static int tg3_run_loopback(struct tg3 *tp, int loopback_mode)
num_pkts = 0;
tg3_set_txd(tnapi, tnapi->tx_prod, map, tx_len, 0, 1);
tg3_set_txd(tnapi, tnapi->tx_prod,
skb_shinfo(skb)->dma_head, tx_len, 0, 1);
tnapi->tx_prod++;
num_pkts++;
@ -10404,7 +10412,7 @@ static int tg3_run_loopback(struct tg3 *tp, int loopback_mode)
break;
}
pci_unmap_single(tp->pdev, map, tx_len, PCI_DMA_TODEVICE);
skb_dma_unmap(&tp->pdev->dev, skb, DMA_TO_DEVICE);
dev_kfree_skb(skb);
if (tx_idx != tnapi->tx_prod)