target/linux/mediatek/patches-4.4/0098-net-next-mediatek-only-trigger-the-tx-watchdog-reset.patch

   1 From cd1343c14328a5de1a58c47b81b8a2febb31d542 Mon Sep 17 00:00:00 2001
   2 From: John Crispin <john@phrozen.org>
   3 Date: Tue, 10 May 2016 11:16:30 +0200
   4 Subject: [PATCH 098/102] net-next: mediatek: only trigger the tx watchdog
   5  reset when all devices are stalled
   6
   7 Signed-off-by: Sean Wang <keyhaede@gmail.com>
   8 Signed-off-by: John Crispin <john@phrozen.org>
   9 ---
  10  drivers/net/ethernet/mediatek/mtk_eth_soc.c |   14 ++++++++++++--
  11  drivers/net/ethernet/mediatek/mtk_eth_soc.h |    1 +
  12  2 files changed, 13 insertions(+), 2 deletions(-)
  13
  14 --- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c
  15 +++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
  16 @@ -1267,11 +1267,21 @@ static void mtk_tx_timeout(struct net_de
  17  {
  18         struct mtk_mac *mac = netdev_priv(dev);
  19         struct mtk_eth *eth = mac->hw;
  20 +       int i, reset = 0;
  21
  22         eth->netdev[mac->id]->stats.tx_errors++;
  23         netif_err(eth, tx_err, dev,
  24                   "transmit timed out\n");
  25 -       schedule_work(&eth->pending_work);
  26 +
  27 +       for (i = 0; i < MTK_MAC_COUNT; i++) {
  28 +               if (!eth->netdev[i] ||
  29 +                   time_after(jiffies, dev_trans_start(eth->netdev[i]) +
  30 +                                                       MTK_WDT_TIMEOUT))
  31 +                       reset++;
  32 +       }
  33 +
  34 +       if (reset == MTK_MAC_COUNT)
  35 +               schedule_work(&eth->pending_work);
  36  }
  37
  38  static irqreturn_t mtk_handle_irq_rx(int irq, void *_eth)
  39 @@ -1765,7 +1775,7 @@ static int mtk_add_mac(struct mtk_eth *e
  40         mac->hw_stats->reg_offset = id * MTK_STAT_OFFSET;
  41
  42         SET_NETDEV_DEV(eth->netdev[id], eth->dev);
  43 -       eth->netdev[id]->watchdog_timeo = 5 * HZ;
  44 +       eth->netdev[id]->watchdog_timeo = MTK_WDT_TIMEOUT;
  45         eth->netdev[id]->netdev_ops = &mtk_netdev_ops;
  46         eth->netdev[id]->base_addr = (unsigned long)eth->base;
  47         eth->netdev[id]->vlan_features = MTK_HW_FEATURES &
  48 --- a/drivers/net/ethernet/mediatek/mtk_eth_soc.h
  49 +++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.h
  50 @@ -15,6 +15,7 @@
  51  #ifndef MTK_ETH_H
  52  #define MTK_ETH_H
  53
  54 +#define MTK_WDT_TIMEOUT                (4 * HZ)
  55  #define MTK_QDMA_PAGE_SIZE     2048
  56  #define        MTK_MAX_RX_LENGTH       1536
  57  #define MTK_TX_DMA_BUF_LEN     0x3fff