net: ethernet: mtk_eth_soc: add missing ppe cache flush when deleting a flow

[ Upstream commit 924531326e2dd4ceabe7240f2b55a88e7d894ec2 ]

The cache needs to be flushed to ensure that the hardware stops offloading
the flow immediately.

Fixes: 33fc42de3327 ("net: ethernet: mtk_eth_soc: support creating mac address based offload entries")
Reviewed-by: Simon Horman <simon.horman@corigine.com>
Signed-off-by: Felix Fietkau <nbd@nbd.name>
Reviewed-by: Leon Romanovsky <leonro@nvidia.com>
Link: https://lore.kernel.org/r/20230330120840.52079-3-nbd@nbd.name
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/net/ethernet/mediatek/mtk_ppe.c b/drivers/net/ethernet/mediatek/mtk_ppe.c
index 34ea8af48c3d09fc23aa3df890fe462642e134dd..d6eed204574a9a50a012b8fc3b5ec33d92d50cd4 100644 (file)
--- a/drivers/net/ethernet/mediatek/mtk_ppe.c
+++ b/drivers/net/ethernet/mediatek/mtk_ppe.c
@@ -438,6 +438,7 @@ __mtk_foe_entry_clear(struct mtk_ppe *ppe, struct mtk_flow_entry *entry)
                hwe->ib1 &= ~MTK_FOE_IB1_STATE;
                hwe->ib1 |= FIELD_PREP(MTK_FOE_IB1_STATE, MTK_FOE_STATE_INVALID);
                dma_wmb();
+               mtk_ppe_cache_clear(ppe);
        }
        entry->hash = 0xffff;