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p54pci: handle dma mapping errors

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This patch adds error-paths to handle pci_dma_mapping errors.

Cc: <stable@kernel.org>
Signed-off-by: Christian Lamparter <chunkeey@googlemail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Christian Lamparter 2010-01-17 23:17:29 +01:00 committed by John W. Linville
parent a98bfec298
commit 288c8ce804
1 changed files with 16 additions and 2 deletions
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18
drivers/net/wireless/p54/p54pci.c
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@ -157,6 +157,14 @@ static void p54p_refill_rx_ring(struct ieee80211_hw *dev,
skb_tail_pointer(skb),
priv->common.rx_mtu + 32,
PCI_DMA_FROMDEVICE);
if (pci_dma_mapping_error(priv->pdev, mapping)) {
dev_kfree_skb_any(skb);
dev_err(&priv->pdev->dev,
"RX DMA Mapping error\n");
break;
}
desc->host_addr = cpu_to_le32(mapping);
desc->device_addr = 0; // FIXME: necessary?
desc->len = cpu_to_le16(priv->common.rx_mtu + 32);
@ -325,14 +333,20 @@ static void p54p_tx(struct ieee80211_hw *dev, struct sk_buff *skb)
u32 device_idx, idx, i;
spin_lock_irqsave(&priv->lock, flags);
device_idx = le32_to_cpu(ring_control->device_idx[1]);
idx = le32_to_cpu(ring_control->host_idx[1]);
i = idx % ARRAY_SIZE(ring_control->tx_data);
priv->tx_buf_data[i] = skb;
mapping = pci_map_single(priv->pdev, skb->data, skb->len,
PCI_DMA_TODEVICE);
if (pci_dma_mapping_error(priv->pdev, mapping)) {
spin_unlock_irqrestore(&priv->lock, flags);
p54_free_skb(dev, skb);
dev_err(&priv->pdev->dev, "TX DMA mapping error\n");
return ;
}
priv->tx_buf_data[i] = skb;
desc = &ring_control->tx_data[i];
desc->host_addr = cpu_to_le32(mapping);
desc->device_addr = ((struct p54_hdr *)skb->data)->req_id;