[PATCH 5.19 46/48] net: ethernet: mtk_eth_soc: fix state in __mtk_foe_entry_clear

Greg Kroah-Hartman
2022-10-10T07:12:47Z

From: Daniel Golle <daniel@makrotopia.org>

commit ae3ed15da5889263de372ff9df2e83e16acca4cb upstream.

Setting ib1 state to MTK_FOE_STATE_UNBIND in __mtk_foe_entry_clear
routine as done by commit 0e80707d94e4c8 ("net: ethernet: mtk_eth_soc:
fix typo in __mtk_foe_entry_clear") breaks flow offloading, at least
on older MTK_NETSYS_V1 SoCs, OpenWrt users have confirmed the bug on
MT7622 and MT7621 systems.
Felix Fietkau suggested to use MTK_FOE_STATE_INVALID instead which
works well on both, MTK_NETSYS_V1 and MTK_NETSYS_V2.

Tested on MT7622 (Linksys E8450) and MT7986 (BananaPi BPI-R3).

Suggested-by: Felix Fietkau <nbd@nbd.name>
Fixes: 0e80707d94e4c8 ("net: ethernet: mtk_eth_soc: fix typo in __mtk_foe_entry_clear")
Fixes: 33fc42de33278b ("net: ethernet: mtk_eth_soc: support creating mac address based offload entries")
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
Link: https://lore.kernel.org/r/YzY+1Yg0FBXcnrtc@makrotopia.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/net/ethernet/mediatek/mtk_ppe.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/net/ethernet/mediatek/mtk_ppe.c
+++ b/drivers/net/ethernet/mediatek/mtk_ppe.c
@@ -412,7 +412,7 @@ __mtk_foe_entry_clear(struct mtk_ppe *pp
if (entry->hash != 0xffff) {
ppe->foe_table[entry->hash].ib1 &= ~MTK_FOE_IB1_STATE;
ppe->foe_table[entry->hash].ib1 |= FIELD_PREP(MTK_FOE_IB1_STATE,
- MTK_FOE_STATE_UNBIND);
+ MTK_FOE_STATE_INVALID);
dma_wmb();
}
entry->hash = 0xffff;