netdev - Re: About r8169 regression 5.4

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Date:   Fri, 21 Feb 2020 22:21:19 +0200
From:   Vincas Dargis <vindrg@...il.com>
To:     Heiner Kallweit <hkallweit1@...il.com>,
        Salvatore Bonaccorso <carnil@...ian.org>
Cc:     netdev@...r.kernel.org
Subject: Re: About r8169 regression 5.4

2020-02-20 20:32, Heiner Kallweit rašė:
> It would be great if you could test one more thing. Few chip versions have a hw issue with tx checksumming
> for very small packets. Maybe your chip version suffers from the same issue.
> Could you please test the following patch (with all features enabled, TSO and checksumming)?
> 
> diff --git a/drivers/net/ethernet/realtek/r8169_main.c b/drivers/net/ethernet/realtek/r8169_main.c
> index 8442b8767..bee90af57 100644
> --- a/drivers/net/ethernet/realtek/r8169_main.c
> +++ b/drivers/net/ethernet/realtek/r8169_main.c
> @@ -4345,6 +4345,7 @@ static netdev_features_t rtl8169_features_check(struct sk_buff *skb,
>   			case RTL_GIGA_MAC_VER_12:
>   			case RTL_GIGA_MAC_VER_17:
>   			case RTL_GIGA_MAC_VER_34:
> +			case RTL_GIGA_MAC_VER_44:
>   				features &= ~NETIF_F_CSUM_MASK;
>   				break;
>   			default:
> 

Sadly, network got hanged after ~1.5h of usage. I've built it with Debian's "debian/bin/test-patches" helper (kernel is now named 5.4.19-1a~test),
double-checked that line was actually added in source. `ethtool -K enp5s0f1 tx on sg on tso on` was executed after boot.