diff options
| -rw-r--r-- | drivers/net/r8169.c | 66 |
1 files changed, 48 insertions, 18 deletions
diff --git a/drivers/net/r8169.c b/drivers/net/r8169.c index 242748b2c35..88d5826ce93 100644 --- a/drivers/net/r8169.c +++ b/drivers/net/r8169.c @@ -3992,11 +3992,18 @@ static struct sk_buff *rtl8169_alloc_rx_data(struct pci_dev *pdev, if (!data) return NULL; } + mapping = dma_map_single(&pdev->dev, rtl8169_align(data), rx_buf_sz, PCI_DMA_FROMDEVICE); + if (unlikely(dma_mapping_error(&pdev->dev, mapping))) + goto err_out; rtl8169_map_to_asic(desc, mapping, rx_buf_sz); return data; + +err_out: + kfree(data); + return NULL; } static void rtl8169_rx_clear(struct rtl8169_private *tp) @@ -4080,12 +4087,13 @@ static void rtl8169_unmap_tx_skb(struct pci_dev *pdev, struct ring_info *tx_skb, tx_skb->len = 0; } -static void rtl8169_tx_clear(struct rtl8169_private *tp) +static void rtl8169_tx_clear_range(struct rtl8169_private *tp, u32 start, + unsigned int n) { unsigned int i; - for (i = tp->dirty_tx; i < tp->dirty_tx + NUM_TX_DESC; i++) { - unsigned int entry = i % NUM_TX_DESC; + for (i = 0; i < n; i++) { + unsigned int entry = (start + i) % NUM_TX_DESC; struct ring_info *tx_skb = tp->tx_skb + entry; unsigned int len = tx_skb->len; @@ -4101,6 +4109,11 @@ static void rtl8169_tx_clear(struct rtl8169_private *tp) tp->dev->stats.tx_dropped++; } } +} + +static void rtl8169_tx_clear(struct rtl8169_private *tp) +{ + rtl8169_tx_clear_range(tp, tp->dirty_tx, NUM_TX_DESC); tp->cur_tx = tp->dirty_tx = 0; } @@ -4219,6 +4232,8 @@ static int rtl8169_xmit_frags(struct rtl8169_private *tp, struct sk_buff *skb, addr = ((void *) page_address(frag->page)) + frag->page_offset; mapping = dma_map_single(&tp->pci_dev->dev, addr, len, PCI_DMA_TODEVICE); + if (unlikely(dma_mapping_error(&tp->pci_dev->dev, mapping))) + goto err_out; /* anti gcc 2.95.3 bugware (sic) */ status = opts1 | len | (RingEnd * !((entry + 1) % NUM_TX_DESC)); @@ -4235,6 +4250,10 @@ static int rtl8169_xmit_frags(struct rtl8169_private *tp, struct sk_buff *skb, } return cur_frag; + +err_out: + rtl8169_tx_clear_range(tp, tp->cur_tx + 1, cur_frag); + return -EIO; } static inline u32 rtl8169_tso_csum(struct sk_buff *skb, struct net_device *dev) @@ -4261,40 +4280,44 @@ static netdev_tx_t rtl8169_start_xmit(struct sk_buff *skb, struct net_device *dev) { struct rtl8169_private *tp = netdev_priv(dev); - unsigned int frags, entry = tp->cur_tx % NUM_TX_DESC; + unsigned int entry = tp->cur_tx % NUM_TX_DESC; struct TxDesc *txd = tp->TxDescArray + entry; void __iomem *ioaddr = tp->mmio_addr; dma_addr_t mapping; u32 status, len; u32 opts1; + int frags; if (unlikely(TX_BUFFS_AVAIL(tp) < skb_shinfo(skb)->nr_frags)) { netif_err(tp, drv, dev, "BUG! Tx Ring full when queue awake!\n"); - goto err_stop; + goto err_stop_0; } if (unlikely(le32_to_cpu(txd->opts1) & DescOwn)) - goto err_stop; + goto err_stop_0; + + len = skb_headlen(skb); + mapping = dma_map_single(&tp->pci_dev->dev, skb->data, len, + PCI_DMA_TODEVICE); + if (unlikely(dma_mapping_error(&tp->pci_dev->dev, mapping))) + goto err_dma_0; + + tp->tx_skb[entry].len = len; + txd->addr = cpu_to_le64(mapping); + txd->opts2 = cpu_to_le32(rtl8169_tx_vlan_tag(tp, skb)); opts1 = DescOwn | rtl8169_tso_csum(skb, dev); frags = rtl8169_xmit_frags(tp, skb, opts1); - if (frags) { - len = skb_headlen(skb); + if (frags < 0) + goto err_dma_1; + else if (frags) opts1 |= FirstFrag; - } else { - len = skb->len; + else { opts1 |= FirstFrag | LastFrag; tp->tx_skb[entry].skb = skb; } - mapping = dma_map_single(&tp->pci_dev->dev, skb->data, len, - PCI_DMA_TODEVICE); - - tp->tx_skb[entry].len = len; - txd->addr = cpu_to_le64(mapping); - txd->opts2 = cpu_to_le32(rtl8169_tx_vlan_tag(tp, skb)); - wmb(); /* anti gcc 2.95.3 bugware (sic) */ @@ -4316,7 +4339,14 @@ static netdev_tx_t rtl8169_start_xmit(struct sk_buff *skb, return NETDEV_TX_OK; -err_stop: +err_dma_1: + rtl8169_unmap_tx_skb(tp->pci_dev, tp->tx_skb + entry, txd); +err_dma_0: + dev_kfree_skb(skb); + dev->stats.tx_dropped++; + return NETDEV_TX_OK; + +err_stop_0: netif_stop_queue(dev); dev->stats.tx_dropped++; return NETDEV_TX_BUSY; |