netdev - RE: [PATCH net] r8169: disable hw csum for short packets and chip versions with hw padding bug

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Date:   Thu, 5 Nov 2020 14:20:56 +0000
From:   David Laight <David.Laight@...LAB.COM>
To:     'Heiner Kallweit' <hkallweit1@...il.com>,
        Jakub Kicinski <kuba@...nel.org>,
        David Miller <davem@...emloft.net>,
        "Realtek linux nic maintainers" <nic_swsd@...ltek.com>
CC:     "netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: RE: [PATCH net] r8169: disable hw csum for short packets and chip
 versions with hw padding bug

From: Heiner Kallweit
> Sent: 05 November 2020 13:58
> 
> RTL8125B has same or similar short packet hw padding bug as RTL8168evl.
> The main workaround has been extended accordingly, however we have to
> disable also hw checksumming for short packets on affected new chip
> versions. Change the code in a way that in case of further affected
> chip versions we have to add them in one place only.

Why not just disable hw checksumming for short packets on
all devices (that use this driver).

It can't make much difference to the performance.
The lack of conditionals may even make it faster.

	David

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