rtlwifi: Fix warning for unchecked pci_map_single() call

Kernel 3.8 implements checking of all DMA mapping calls and issues
a WARNING for the first it finds that is not checked.

Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/drivers/net/wireless/rtlwifi/pci.c b/drivers/net/wireless/rtlwifi/pci.c
index 3deacafdcd5e..4261e8ecc4c3 100644
--- a/drivers/net/wireless/rtlwifi/pci.c
+++ b/drivers/net/wireless/rtlwifi/pci.c
@@ -743,6 +743,8 @@ static void _rtl_pci_rx_interrupt(struct ieee80211_hw *hw)
 
 done:
                 bufferaddress = (*((dma_addr_t *)skb->cb));
+                if (pci_dma_mapping_error(rtlpci->pdev, bufferaddress))
+                        return;
                 tmp_one = 1;
                 rtlpriv->cfg->ops->set_desc((u8 *) pdesc, false,
                                             HW_DESC_RXBUFF_ADDR,
@@ -1115,6 +1117,10 @@ static int _rtl_pci_init_rx_ring(struct ieee80211_hw *hw)
                                            PCI_DMA_FROMDEVICE);
 
                         bufferaddress = (*((dma_addr_t *)skb->cb));
+                        if (pci_dma_mapping_error(rtlpci->pdev, bufferaddress)) {
+                                dev_kfree_skb_any(skb);
+                                return 1;
+                        }
                         rtlpriv->cfg->ops->set_desc((u8 *)entry, false,
                                                     HW_DESC_RXBUFF_ADDR,
                                                     (u8 *)&bufferaddress);