staging: rtl8192e: Fix failure to check pci_map_single()

Beginning with kernel 3.8, the DMA mapping routines issue a warning
for the first call to pci_map_single() that is not checked with a
pci_dma_mapping_error() call.

Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2 files changed, 13 insertions, 2 deletions

diff --git a/drivers/staging/rtl8192e/rtl8192e/r8192E_dev.c b/drivers/staging/rtl8192e/rtl8192e/r8192E_dev.c
index 808aab6fa5ef..a9d78e9651c6 100644
--- a/drivers/staging/rtl8192e/rtl8192e/r8192E_dev.c
+++ b/drivers/staging/rtl8192e/rtl8192e/r8192E_dev.c
@@ -1183,6 +1183,8 @@ void  rtl8192_tx_fill_desc(struct net_device *dev, struct tx_desc *pdesc,
                                                 pTxFwInfo->TxRate,
                                                 cb_desc);
 
+        if (pci_dma_mapping_error(priv->pdev, mapping))
+                RT_TRACE(COMP_ERR, "DMA Mapping error\n");;
         if (cb_desc->bAMPDUEnable) {
                 pTxFwInfo->AllowAggregation = 1;
                 pTxFwInfo->RxMF = cb_desc->ampdu_factor;
@@ -1280,6 +1282,8 @@ void  rtl8192_tx_fill_cmd_desc(struct net_device *dev,
         dma_addr_t mapping = pci_map_single(priv->pdev, skb->data, skb->len,
                          PCI_DMA_TODEVICE);
 
+        if (pci_dma_mapping_error(priv->pdev, mapping))
+                RT_TRACE(COMP_ERR, "DMA Mapping error\n");;
         memset(entry, 0, 12);
         entry->LINIP = cb_desc->bLastIniPkt;
         entry->FirstSeg = 1;
diff --git a/drivers/staging/rtl8192e/rtl8192e/rtl_core.c b/drivers/staging/rtl8192e/rtl8192e/rtl_core.c
index 1a70f324552f..4ebf99b30975 100644
--- a/drivers/staging/rtl8192e/rtl8192e/rtl_core.c
+++ b/drivers/staging/rtl8192e/rtl8192e/rtl_core.c
@@ -2104,7 +2104,10 @@ static short rtl8192_alloc_rx_desc_ring(struct net_device *dev)
                                                   skb_tail_pointer_rsl(skb),
                                                   priv->rxbuffersize,
                                                   PCI_DMA_FROMDEVICE);
-
+                        if (pci_dma_mapping_error(priv->pdev, *mapping)) {
+                                dev_kfree_skb_any(skb);
+                                return -1;
+                        }
                         entry->BufferAddress = cpu_to_le32(*mapping);
 
                         entry->Length = priv->rxbuffersize;
@@ -2397,7 +2400,11 @@ static void rtl8192_rx_normal(struct net_device *dev)
                                                     skb_tail_pointer_rsl(skb),
                                                     priv->rxbuffersize,
                                                     PCI_DMA_FROMDEVICE);
-
+                        if (pci_dma_mapping_error(priv->pdev,
+                                                  *((dma_addr_t *)skb->cb))) {
+                                dev_kfree_skb_any(skb);
+                                return;
+                        }
                 }
 done:
                 pdesc->BufferAddress = cpu_to_le32(*((dma_addr_t *)skb->cb));