rtlwifi: rtl8192se: 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, 12 insertions, 1 deletions

diff --git a/drivers/net/wireless/rtlwifi/rtl8192se/trx.c b/drivers/net/wireless/rtlwifi/rtl8192se/trx.c
index 0e9f6ebf078a..206561d7282f 100644
--- a/drivers/net/wireless/rtlwifi/rtl8192se/trx.c
+++ b/drivers/net/wireless/rtlwifi/rtl8192se/trx.c
@@ -611,6 +611,11 @@ void rtl92se_tx_fill_desc(struct ieee80211_hw *hw,
                     PCI_DMA_TODEVICE);
         u8 bw_40 = 0;
 
+        if (pci_dma_mapping_error(rtlpci->pdev, mapping)) {
+                RT_TRACE(rtlpriv, COMP_SEND, DBG_TRACE,
+                         "DMA mapping error");
+                return;
+        }
         if (mac->opmode == NL80211_IFTYPE_STATION) {
                 bw_40 = mac->bw_40;
         } else if (mac->opmode == NL80211_IFTYPE_AP ||
@@ -763,6 +768,7 @@ void rtl92se_tx_fill_desc(struct ieee80211_hw *hw,
 void rtl92se_tx_fill_cmddesc(struct ieee80211_hw *hw, u8 *pdesc,
         bool firstseg, bool lastseg, struct sk_buff *skb)
 {
+        struct rtl_priv *rtlpriv = rtl_priv(hw);
         struct rtl_pci *rtlpci = rtl_pcidev(rtl_pcipriv(hw));
         struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
         struct rtl_tcb_desc *tcb_desc = (struct rtl_tcb_desc *)(skb->cb);
@@ -770,7 +776,12 @@ void rtl92se_tx_fill_cmddesc(struct ieee80211_hw *hw, u8 *pdesc,
         dma_addr_t mapping = pci_map_single(rtlpci->pdev, skb->data, skb->len,
                         PCI_DMA_TODEVICE);
 
-    /* Clear all status */
+        if (pci_dma_mapping_error(rtlpci->pdev, mapping)) {
+                RT_TRACE(rtlpriv, COMP_SEND, DBG_TRACE,
+                         "DMA mapping error");
+                return;
+        }
+        /* Clear all status     */
         CLEAR_PCI_TX_DESC_CONTENT(pdesc, TX_CMDDESC_SIZE_RTL8192S);
 
         /* This bit indicate this packet is used for FW download. */