[netdrvr] Fix IOMMU overflow checking in s2io.c

[linux-2.6-omap-h63xx.git] / drivers / net / s2io.c

diff --git a/drivers/net/s2io.c b/drivers/net/s2io.c
index b5c1e663417d874aaba92270b2f765fe5cab8ee0..ae7b697456b4c88245ec36e6599efb17e6dc280f 100644 (file)
--- a/drivers/net/s2io.c
+++ b/drivers/net/s2io.c
@@ -2625,9 +2625,7 @@ static int fill_rx_buffers(struct ring_info *ring)
                        rxdp1->Buffer0_ptr = pci_map_single
                            (ring->pdev, skb->data, size - NET_IP_ALIGN,
                                PCI_DMA_FROMDEVICE);
-                       if( (rxdp1->Buffer0_ptr == 0) ||
-                               (rxdp1->Buffer0_ptr ==
-                               DMA_ERROR_CODE))
+                       if(pci_dma_mapping_error(rxdp1->Buffer0_ptr))
                                goto pci_map_failed;
 
                        rxdp->Control_2 =
@@ -2657,6 +2655,7 @@ static int fill_rx_buffers(struct ring_info *ring)
                        skb->data = (void *) (unsigned long)tmp;
                        skb_reset_tail_pointer(skb);
 
+                       /* AK: check is wrong. 0 can be valid dma address */
                        if (!(rxdp3->Buffer0_ptr))
                                rxdp3->Buffer0_ptr =
                                   pci_map_single(ring->pdev, ba->ba_0,
@@ -2665,8 +2664,7 @@ static int fill_rx_buffers(struct ring_info *ring)
                                pci_dma_sync_single_for_device(ring->pdev,
                                (dma_addr_t) rxdp3->Buffer0_ptr,
                                    BUF0_LEN, PCI_DMA_FROMDEVICE);
-                       if( (rxdp3->Buffer0_ptr == 0) ||
-                               (rxdp3->Buffer0_ptr == DMA_ERROR_CODE))
+                       if (pci_dma_mapping_error(rxdp3->Buffer0_ptr))
                                goto pci_map_failed;
 
                        rxdp->Control_2 = SET_BUFFER0_SIZE_3(BUF0_LEN);
@@ -2681,18 +2679,17 @@ static int fill_rx_buffers(struct ring_info *ring)
                                (ring->pdev, skb->data, ring->mtu + 4,
                                                PCI_DMA_FROMDEVICE);
 
-                               if( (rxdp3->Buffer2_ptr == 0) ||
-                                       (rxdp3->Buffer2_ptr == DMA_ERROR_CODE))
+                               if (pci_dma_mapping_error(rxdp3->Buffer2_ptr))
                                        goto pci_map_failed;
 
+                               /* AK: check is wrong */
                                if (!rxdp3->Buffer1_ptr)
                                        rxdp3->Buffer1_ptr =
                                                pci_map_single(ring->pdev,
                                                ba->ba_1, BUF1_LEN,
                                                PCI_DMA_FROMDEVICE);
 
-                               if( (rxdp3->Buffer1_ptr == 0) ||
-                                       (rxdp3->Buffer1_ptr == DMA_ERROR_CODE)) {
+                               if (pci_dma_mapping_error(rxdp3->Buffer1_ptr)) {
                                        pci_unmap_single
                                                (ring->pdev,
                                                (dma_addr_t)(unsigned long)
@@ -4264,16 +4261,14 @@ static int s2io_xmit(struct sk_buff *skb, struct net_device *dev)
                txdp->Buffer_Pointer = pci_map_single(sp->pdev,
                                        fifo->ufo_in_band_v,
                                        sizeof(u64), PCI_DMA_TODEVICE);
-               if((txdp->Buffer_Pointer == 0) ||
-                       (txdp->Buffer_Pointer == DMA_ERROR_CODE))
+               if (pci_dma_mapping_error(txdp->Buffer_Pointer))
                        goto pci_map_failed;
                txdp++;
        }
 
        txdp->Buffer_Pointer = pci_map_single
            (sp->pdev, skb->data, frg_len, PCI_DMA_TODEVICE);
-       if((txdp->Buffer_Pointer == 0) ||
-               (txdp->Buffer_Pointer == DMA_ERROR_CODE))
+       if (pci_dma_mapping_error(txdp->Buffer_Pointer))
                goto pci_map_failed;
 
        txdp->Host_Control = (unsigned long) skb;
@@ -6884,10 +6879,8 @@ static int set_rxd_buffer_pointer(struct s2io_nic *sp, struct RxD_t *rxdp,
                                pci_map_single( sp->pdev, (*skb)->data,
                                        size - NET_IP_ALIGN,
                                        PCI_DMA_FROMDEVICE);
-                       if( (rxdp1->Buffer0_ptr == 0) ||
-                               (rxdp1->Buffer0_ptr == DMA_ERROR_CODE)) {
+                       if (pci_dma_mapping_error(rxdp1->Buffer0_ptr))
                                goto memalloc_failed;
-                       }
                        rxdp->Host_Control = (unsigned long) (*skb);
                }
        } else if ((sp->rxd_mode == RXD_MODE_3B) && (rxdp->Host_Control == 0)) {
@@ -6913,15 +6906,12 @@ static int set_rxd_buffer_pointer(struct s2io_nic *sp, struct RxD_t *rxdp,
                                pci_map_single(sp->pdev, (*skb)->data,
                                               dev->mtu + 4,
                                               PCI_DMA_FROMDEVICE);
-                       if( (rxdp3->Buffer2_ptr == 0) ||
-                               (rxdp3->Buffer2_ptr == DMA_ERROR_CODE)) {
+                       if (pci_dma_mapping_error(rxdp3->Buffer2_ptr))
                                goto memalloc_failed;
-                       }
                        rxdp3->Buffer0_ptr = *temp0 =
                                pci_map_single( sp->pdev, ba->ba_0, BUF0_LEN,
                                                PCI_DMA_FROMDEVICE);
-                       if( (rxdp3->Buffer0_ptr == 0) ||
-                               (rxdp3->Buffer0_ptr == DMA_ERROR_CODE)) {
+                       if (pci_dma_mapping_error(rxdp3->Buffer0_ptr)) {
                                pci_unmap_single (sp->pdev,
                                        (dma_addr_t)rxdp3->Buffer2_ptr,
                                        dev->mtu + 4, PCI_DMA_FROMDEVICE);
@@ -6933,8 +6923,7 @@ static int set_rxd_buffer_pointer(struct s2io_nic *sp, struct RxD_t *rxdp,
                        rxdp3->Buffer1_ptr = *temp1 =
                                pci_map_single(sp->pdev, ba->ba_1, BUF1_LEN,
                                                PCI_DMA_FROMDEVICE);
-                       if( (rxdp3->Buffer1_ptr == 0) ||
-                               (rxdp3->Buffer1_ptr == DMA_ERROR_CODE)) {
+                       if (pci_dma_mapping_error(rxdp3->Buffer1_ptr)) {
                                pci_unmap_single (sp->pdev,
                                        (dma_addr_t)rxdp3->Buffer0_ptr,
                                        BUF0_LEN, PCI_DMA_FROMDEVICE);