diff options
| author | andrea.merello <andrea.merello@gmail.com> | 2014-02-05 22:38:06 +0100 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2014-02-06 14:35:53 -0500 |
| commit | 348f7d4adee97f222e3ad9ff97956ca3793d11c6 (patch) | |
| tree | 150c5d381aa5e34986d0f99b7a9ee4e095cb150b /drivers | |
| parent | 2b4db05e7e2f1efc71e36a9dc1adf5ba164a2330 (diff) | |
rtl8180: Add error check for pci_map_single return value in TX path
Orignal code will not detect a DMA mapping failure, causing the HW
to attempt a DMA from an invalid address.
This patch add the error check and eventually simply drops the TX
packet if we can't map it for DMA.
Signed-off-by: andrea merello <andrea.merello@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/wireless/rtl818x/rtl8180/dev.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/net/wireless/rtl818x/rtl8180/dev.c b/drivers/net/wireless/rtl818x/rtl8180/dev.c index fad616a0fa37..3867d1470b36 100644 --- a/drivers/net/wireless/rtl818x/rtl8180/dev.c +++ b/drivers/net/wireless/rtl818x/rtl8180/dev.c @@ -276,6 +276,13 @@ static void rtl8180_tx(struct ieee80211_hw *dev, mapping = pci_map_single(priv->pdev, skb->data, skb->len, PCI_DMA_TODEVICE); + if (pci_dma_mapping_error(priv->pdev, mapping)) { + kfree_skb(skb); + dev_err(&priv->pdev->dev, "TX DMA mapping error\n"); + return; + + } + tx_flags = RTL818X_TX_DESC_FLAG_OWN | RTL818X_TX_DESC_FLAG_FS | RTL818X_TX_DESC_FLAG_LS | (ieee80211_get_tx_rate(dev, info)->hw_value << 24) | |