target/linux/generic/backport-5.15/733-v6.3-21-net-ethernet-mtk_eth_soc-add-missing-ppe-cache-flush.patch

   1 From: Felix Fietkau <nbd@nbd.name>
   2 Date: Thu, 23 Mar 2023 11:19:14 +0100
   3 Subject: [PATCH] net: ethernet: mtk_eth_soc: add missing ppe cache flush when
   4  deleting a flow
   5
   6 The cache needs to be flushed to ensure that the hardware stops offloading
   7 the flow immediately.
   8
   9 Signed-off-by: Felix Fietkau <nbd@nbd.name>
  10 ---
  11
  12 --- a/drivers/net/ethernet/mediatek/mtk_ppe.c
  13 +++ b/drivers/net/ethernet/mediatek/mtk_ppe.c
  14 @@ -464,6 +464,7 @@ __mtk_foe_entry_clear(struct mtk_ppe *pp
  15                 hwe->ib1 &= ~MTK_FOE_IB1_STATE;
  16                 hwe->ib1 |= FIELD_PREP(MTK_FOE_IB1_STATE, MTK_FOE_STATE_INVALID);
  17                 dma_wmb();
  18 +               mtk_ppe_cache_clear(ppe);
  19         }
  20         entry->hash = 0xffff;
  21