target/linux/generic/backport-6.6/752-05-v6.7-net-ethernet-mtk_wed-do-not-assume-offload-callbacks.patch

   1 From: Lorenzo Bianconi <lorenzo@kernel.org>
   2 Date: Wed, 13 Sep 2023 20:42:47 +0200
   3 Subject: [PATCH] net: ethernet: mtk_wed: do not assume offload callbacks are
   4  always set
   5
   6 Check if wlan.offload_enable and wlan.offload_disable callbacks are set
   7 in mtk_wed_flow_add/mtk_wed_flow_remove since mt7996 will not rely
   8 on them.
   9
  10 Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
  11 Reviewed-by: Simon Horman <horms@kernel.org>
  12 Signed-off-by: David S. Miller <davem@davemloft.net>
  13 ---
  14
  15 --- a/drivers/net/ethernet/mediatek/mtk_wed.c
  16 +++ b/drivers/net/ethernet/mediatek/mtk_wed.c
  17 @@ -1712,19 +1712,20 @@ mtk_wed_irq_set_mask(struct mtk_wed_devi
  18  int mtk_wed_flow_add(int index)
  19  {
  20         struct mtk_wed_hw *hw = hw_list[index];
  21 -       int ret;
  22 +       int ret = 0;
  23
  24 -       if (!hw || !hw->wed_dev)
  25 -               return -ENODEV;
  26 +       mutex_lock(&hw_lock);
  27
  28 -       if (hw->num_flows) {
  29 -               hw->num_flows++;
  30 -               return 0;
  31 +       if (!hw || !hw->wed_dev) {
  32 +               ret = -ENODEV;
  33 +               goto out;
  34         }
  35
  36 -       mutex_lock(&hw_lock);
  37 -       if (!hw->wed_dev) {
  38 -               ret = -ENODEV;
  39 +       if (!hw->wed_dev->wlan.offload_enable)
  40 +               goto out;
  41 +
  42 +       if (hw->num_flows) {
  43 +               hw->num_flows++;
  44                 goto out;
  45         }
  46
  47 @@ -1743,14 +1744,15 @@ void mtk_wed_flow_remove(int index)
  48  {
  49         struct mtk_wed_hw *hw = hw_list[index];
  50
  51 -       if (!hw)
  52 -               return;
  53 +       mutex_lock(&hw_lock);
  54
  55 -       if (--hw->num_flows)
  56 -               return;
  57 +       if (!hw || !hw->wed_dev)
  58 +               goto out;
  59
  60 -       mutex_lock(&hw_lock);
  61 -       if (!hw->wed_dev)
  62 +       if (!hw->wed_dev->wlan.offload_disable)
  63 +               goto out;
  64 +
  65 +       if (--hw->num_flows)
  66                 goto out;
  67
  68         hw->wed_dev->wlan.offload_disable(hw->wed_dev);