netdev - Re: [PATCH] net: ethernet: mtk_eth_soc: fix state in __mtk_foe_entry

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Message-ID: <YzQTi1CfU79u8RYT@lore-desk>
Date:   Wed, 28 Sep 2022 11:27:39 +0200
From:   Lorenzo Bianconi <lorenzo@...nel.org>
To:     Daniel Golle <daniel@...rotopia.org>
Cc:     linux-mediatek@...ts.infradead.org, netdev@...r.kernel.org,
        Sujuan Chen <sujuan.chen@...iatek.com>,
        Bo Jiao <Bo.Jiao@...iatek.com>, Felix Fietkau <nbd@....name>,
        John Crispin <john@...ozen.org>,
        Sean Wang <sean.wang@...iatek.com>,
        Mark Lee <Mark-MC.Lee@...iatek.com>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Chen Minqiang <ptpt52@...il.com>,
        Thomas Hühn <thomas.huehn@...nordhausen.de>
Subject: Re: [PATCH] net: ethernet: mtk_eth_soc: fix state in
 __mtk_foe_entry_clear

> 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@....name>
> Fixes: 0e80707d94e4c8 ("net: ethernet: mtk_eth_soc: fix typo in __mtk_foe_entry_clear")
> Fixes: 33fc42de33278 ("net: ethernet: mtk_eth_soc: support creating mac address based offload entries")
> Signed-off-by: Daniel Golle <daniel@...rotopia.org>

Acked-by: Lorenzo Bianconi <lorenzo@...nel.org>

> ---
>  drivers/net/ethernet/mediatek/mtk_ppe.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/net/ethernet/mediatek/mtk_ppe.c b/drivers/net/ethernet/mediatek/mtk_ppe.c
> index 887f430734f747..ae00e572390d7b 100644
> --- a/drivers/net/ethernet/mediatek/mtk_ppe.c
> +++ b/drivers/net/ethernet/mediatek/mtk_ppe.c
> @@ -442,7 +442,7 @@ __mtk_foe_entry_clear(struct mtk_ppe *ppe, struct mtk_flow_entry *entry)
>  		struct mtk_foe_entry *hwe = mtk_foe_get_entry(ppe, entry->hash);
>  
>  		hwe->ib1 &= ~MTK_FOE_IB1_STATE;
> -		hwe->ib1 |= FIELD_PREP(MTK_FOE_IB1_STATE, MTK_FOE_STATE_UNBIND);
> +		hwe->ib1 |= FIELD_PREP(MTK_FOE_IB1_STATE, MTK_FOE_STATE_INVALID);
>  		dma_wmb();
>  	}
>  	entry->hash = 0xffff;
> -- 
> 2.37.3
> 

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