The pch_gbe driver has an issue which a network stops, when receiving traffic is high. In the case, The link down and up are necessary to return a network.
This patch fixed this issue. commit 805e969f6151eda7bc1a57e9c737054230acc3cc kernel 3.0 Cc: [email protected] Signed-off-by: Toshiharu Okada <[email protected]> Signed-off-by: David S. Miller <[email protected]> Signed-off-by: Tomoya MORINAGA <[email protected]> --- drivers/net/pch_gbe/pch_gbe_main.c | 56 +++++++++++++++++------------------ 1 files changed, 27 insertions(+), 29 deletions(-) diff --git a/drivers/net/pch_gbe/pch_gbe_main.c b/drivers/net/pch_gbe/pch_gbe_main.c index a11b7a2..d506e28 100644 --- a/drivers/net/pch_gbe/pch_gbe_main.c +++ b/drivers/net/pch_gbe/pch_gbe_main.c @@ -1199,6 +1199,8 @@ static irqreturn_t pch_gbe_intr(int irq, void *data) iowrite32((int_en & ~PCH_GBE_INT_RX_FIFO_ERR), &hw->reg->INT_EN); pch_gbe_stop_receive(adapter); + int_st |= ioread32(&hw->reg->INT_ST); + int_st = int_st & ioread32(&hw->reg->INT_EN); } if (int_st & PCH_GBE_INT_RX_DMA_ERR) adapter->stats.intr_rx_dma_err_count++; @@ -1218,14 +1220,11 @@ static irqreturn_t pch_gbe_intr(int irq, void *data) /* Set Pause packet */ pch_gbe_mac_set_pause_packet(hw); } - if ((int_en & (PCH_GBE_INT_RX_DMA_CMPLT | PCH_GBE_INT_TX_CMPLT)) - == 0) { - return IRQ_HANDLED; - } } /* When request status is Receive interruption */ - if ((int_st & (PCH_GBE_INT_RX_DMA_CMPLT | PCH_GBE_INT_TX_CMPLT))) { + if ((int_st & (PCH_GBE_INT_RX_DMA_CMPLT | PCH_GBE_INT_TX_CMPLT)) || + (adapter->rx_stop_flag == true)) { if (likely(napi_schedule_prep(&adapter->napi))) { /* Enable only Rx Descriptor empty */ atomic_inc(&adapter->irq_sem); @@ -1385,7 +1384,7 @@ pch_gbe_clean_tx(struct pch_gbe_adapter *adapter, struct sk_buff *skb; unsigned int i; unsigned int cleaned_count = 0; - bool cleaned = false; + bool cleaned = true; pr_debug("next_to_clean : %d\n", tx_ring->next_to_clean); @@ -1396,7 +1395,6 @@ pch_gbe_clean_tx(struct pch_gbe_adapter *adapter, while ((tx_desc->gbec_status & DSC_INIT16) == 0x0000) { pr_debug("gbec_status:0x%04x\n", tx_desc->gbec_status); - cleaned = true; buffer_info = &tx_ring->buffer_info[i]; skb = buffer_info->skb; @@ -1439,8 +1437,10 @@ pch_gbe_clean_tx(struct pch_gbe_adapter *adapter, tx_desc = PCH_GBE_TX_DESC(*tx_ring, i); /* weight of a sort for tx, to avoid endless transmit cleanup */ - if (cleaned_count++ == PCH_GBE_TX_WEIGHT) + if (cleaned_count++ == PCH_GBE_TX_WEIGHT) { + cleaned = false; break; + } } pr_debug("called pch_gbe_unmap_and_free_tx_resource() %d count\n", cleaned_count); @@ -2174,7 +2174,6 @@ static int pch_gbe_napi_poll(struct napi_struct *napi, int budget) { struct pch_gbe_adapter *adapter = container_of(napi, struct pch_gbe_adapter, napi); - struct net_device *netdev = adapter->netdev; int work_done = 0; bool poll_end_flag = false; bool cleaned = false; @@ -2182,33 +2181,32 @@ static int pch_gbe_napi_poll(struct napi_struct *napi, int budget) pr_debug("budget : %d\n", budget); - /* Keep link state information with original netdev */ - if (!netif_carrier_ok(netdev)) { + pch_gbe_clean_rx(adapter, adapter->rx_ring, &work_done, budget); + cleaned = pch_gbe_clean_tx(adapter, adapter->tx_ring); + + if (!cleaned) + work_done = budget; + /* If no Tx and not enough Rx work done, + * exit the polling mode + */ + if (work_done < budget) poll_end_flag = true; - } else { - pch_gbe_clean_rx(adapter, adapter->rx_ring, &work_done, budget); + + if (poll_end_flag) { + napi_complete(napi); + if (adapter->rx_stop_flag) { + adapter->rx_stop_flag = false; + pch_gbe_start_receive(&adapter->hw); + } + pch_gbe_irq_enable(adapter); + } else if (adapter->rx_stop_flag) { adapter->rx_stop_flag = false; pch_gbe_start_receive(&adapter->hw); int_en = ioread32(&adapter->hw.reg->INT_EN); iowrite32((int_en | PCH_GBE_INT_RX_FIFO_ERR), - &adapter->hw.reg->INT_EN); + &adapter->hw.reg->INT_EN); } - cleaned = pch_gbe_clean_tx(adapter, adapter->tx_ring); - - if (cleaned) - work_done = budget; - /* If no Tx and not enough Rx work done, - * exit the polling mode - */ - if (work_done < budget) - poll_end_flag = true; - } - - if (poll_end_flag) { - napi_complete(napi); - pch_gbe_irq_enable(adapter); - } pr_debug("poll_end_flag : %d work_done : %d budget : %d\n", poll_end_flag, work_done, budget); -- 1.7.7.6 -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
