rtlwifi: rtl8192de: 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, 10 insertions, 0 deletions

diff --git a/drivers/net/wireless/rtlwifi/rtl8192de/trx.c b/drivers/net/wireless/rtlwifi/rtl8192de/trx.c
index f9f3861046c1..a0fbf284420e 100644
--- a/drivers/net/wireless/rtlwifi/rtl8192de/trx.c
+++ b/drivers/net/wireless/rtlwifi/rtl8192de/trx.c
@@ -587,6 +587,11 @@ void rtl92de_tx_fill_desc(struct ieee80211_hw *hw,
         buf_len = skb->len;
         mapping = pci_map_single(rtlpci->pdev, skb->data, skb->len,
                                  PCI_DMA_TODEVICE);
+        if (pci_dma_mapping_error(rtlpci->pdev, mapping)) {
+                RT_TRACE(rtlpriv, COMP_SEND, DBG_TRACE,
+                         "DMA mapping error");
+                return;
+        }
         CLEAR_PCI_TX_DESC_CONTENT(pdesc, sizeof(struct tx_desc_92d));
         if (ieee80211_is_nullfunc(fc) || ieee80211_is_ctl(fc)) {
                 firstseg = true;
@@ -740,6 +745,11 @@ void rtl92de_tx_fill_cmddesc(struct ieee80211_hw *hw,
         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)(skb->data);
         __le16 fc = hdr->frame_control;
 
+        if (pci_dma_mapping_error(rtlpci->pdev, mapping)) {
+                RT_TRACE(rtlpriv, COMP_SEND, DBG_TRACE,
+                         "DMA mapping error");
+                return;
+        }
         CLEAR_PCI_TX_DESC_CONTENT(pdesc, TX_DESC_SIZE);
         if (firstseg)
                 SET_TX_DESC_OFFSET(pdesc, USB_HWDESC_HEADER_LEN);