From: Felix Fietkau <nbd@nbd.name>
Date: Thu, 30 Mar 2023 12:08:40 +0000 (+0200)
Subject: net: ethernet: mtk_eth_soc: add missing ppe cache flush when deleting a flow
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=106fb49b14af1eeb064616090f8cc9afc27516be;p=users%2Fjedix%2Flinux-maple.git

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 34ea8af48c3d..d6eed204574a 100644
--- 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;