diff options
| author |   Christian Lamparter <chunkeey@googlemail.com> | 2010-01-17 23:17:29 +0100 |
|---|---|---|
| committer |   John W. Linville <linville@tuxdriver.com> | 2010-01-19 16:43:11 -0500 |
| commit | 288c8ce8047695fd8872dd5db3ef21a9679c402f (patch) | |
| tree | ec084ee8b1948850e3fa39727a73bd945fee649f /drivers/net/wireless/p54 | |
| parent | mac80211: Fixed a bug in IBSS merge (diff) | |
| download | linux-dev-288c8ce8047695fd8872dd5db3ef21a9679c402f.tar.xz linux-dev-288c8ce8047695fd8872dd5db3ef21a9679c402f.zip | |
p54pci: handle dma mapping errors
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>
Diffstat (limited to 'drivers/net/wireless/p54')
| -rw-r--r-- | drivers/net/wireless/p54/p54pci.c | 18 |
1 files changed, 16 insertions, 2 deletions
diff --git a/drivers/net/wireless/p54/p54pci.c b/drivers/net/wireless/p54/p54pci.c index a72f7c2577de..4bf4c213baec 100644 --- a/drivers/net/wireless/p54/p54pci.c +++ b/drivers/net/wireless/p54/p54pci.c @@ -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; |