target/linux/generic/pending-5.4/770-11-net-ethernet-mtk_eth_soc-avoid-rearming-interrupt-if.pa

   1 From: Felix Fietkau <nbd@nbd.name>
   2 Date: Fri, 4 Sep 2020 18:14:05 +0200
   3 Subject: [PATCH] net: ethernet: mtk_eth_soc: avoid rearming interrupt if
   4  napi_complete returns false
   5
   6 Reduces unnecessary interrupts
   7
   8 Signed-off-by: Felix Fietkau <nbd@nbd.name>
   9 ---
  10
  11 --- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c
  12 +++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
  13 @@ -1512,8 +1512,8 @@ static int mtk_napi_tx(struct napi_struc
  14         if (status & MTK_TX_DONE_INT)
  15                 return budget;
  16
  17 -       napi_complete(napi);
  18 -       mtk_tx_irq_enable(eth, MTK_TX_DONE_INT);
  19 +       if (napi_complete(napi))
  20 +               mtk_tx_irq_enable(eth, MTK_TX_DONE_INT);
  21
  22         return tx_done;
  23  }
  24 @@ -1546,8 +1546,9 @@ poll_again:
  25                 remain_budget -= rx_done;
  26                 goto poll_again;
  27         }
  28 -       napi_complete(napi);
  29 -       mtk_rx_irq_enable(eth, MTK_RX_DONE_INT);
  30 +
  31 +       if (napi_complete(napi))
  32 +               mtk_rx_irq_enable(eth, MTK_RX_DONE_INT);
  33
  34         return rx_done + budget - remain_budget;
  35  }