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>

diff --git a/drivers/net/wireless/rtlwifi/pci.c b/drivers/net/wireless/rtlwifi/pci.c
index 3deacafdcd5ed3c33c1384a9f5e84e4cd08517e8..4261e8ecc4c382d84a9b19c40d8fed2b463d5a5a 100644 (file)
--- 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);