target/linux/generic/backport-5.15/711-v6.0-03-net-ethernet-mtk-ppe-fix-traffic-offload-with-bridge.patch

   1 From: Lorenzo Bianconi <lorenzo@kernel.org>
   2 Date: Fri, 22 Jul 2022 09:06:19 +0200
   3 Subject: [PATCH] net: ethernet: mtk-ppe: fix traffic offload with bridged wlan
   4
   5 A typical flow offload scenario for OpenWrt users is routed traffic
   6 received by the wan interface that is redirected to a wlan device
   7 belonging to the lan bridge. Current implementation fails to
   8 fill wdma offload info in mtk_flow_get_wdma_info() since odev device is
   9 the local bridge. Fix the issue running dev_fill_forward_path routine in
  10 mtk_flow_get_wdma_info in order to identify the wlan device.
  11
  12 Tested-by: Paolo Valerio <pvalerio@redhat.com>
  13 Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
  14 Signed-off-by: David S. Miller <davem@davemloft.net>
  15 ---
  16
  17 --- a/drivers/net/ethernet/mediatek/mtk_ppe_offload.c
  18 +++ b/drivers/net/ethernet/mediatek/mtk_ppe_offload.c
  19 @@ -88,32 +88,28 @@ mtk_flow_offload_mangle_eth(const struct
  20  static int
  21  mtk_flow_get_wdma_info(struct net_device *dev, const u8 *addr, struct mtk_wdma_info *info)
  22  {
  23 -       struct net_device_path_ctx ctx = {
  24 -               .dev = dev,
  25 -       };
  26 -       struct net_device_path path = {};
  27 +       struct net_device_path_stack stack;
  28 +       struct net_device_path *path;
  29 +       int err;
  30
  31 -       if (!ctx.dev)
  32 +       if (!dev)
  33                 return -ENODEV;
  34
  35 -       memcpy(ctx.daddr, addr, sizeof(ctx.daddr));
  36 -
  37         if (!IS_ENABLED(CONFIG_NET_MEDIATEK_SOC_WED))
  38                 return -1;
  39
  40 -       if (!dev->netdev_ops->ndo_fill_forward_path)
  41 -               return -1;
  42 -
  43 -       if (dev->netdev_ops->ndo_fill_forward_path(&ctx, &path))
  44 -               return -1;
  45 +       err = dev_fill_forward_path(dev, addr, &stack);
  46 +       if (err)
  47 +               return err;
  48
  49 -       if (path.type != DEV_PATH_MTK_WDMA)
  50 +       path = &stack.path[stack.num_paths - 1];
  51 +       if (path->type != DEV_PATH_MTK_WDMA)
  52                 return -1;
  53
  54 -       info->wdma_idx = path.mtk_wdma.wdma_idx;
  55 -       info->queue = path.mtk_wdma.queue;
  56 -       info->bss = path.mtk_wdma.bss;
  57 -       info->wcid = path.mtk_wdma.wcid;
  58 +       info->wdma_idx = path->mtk_wdma.wdma_idx;
  59 +       info->queue = path->mtk_wdma.queue;
  60 +       info->bss = path->mtk_wdma.bss;
  61 +       info->wcid = path->mtk_wdma.wcid;
  62
  63         return 0;
  64  }