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From: Vladimir Oltean <olteanv@gmail.com>
To: Lino Sanfilippo <LinoSanfilippo@gmx.de>
Cc: Andrew Lunn <andrew@lunn.ch>,
	woojung.huh@microchip.com, UNGLinuxDriver@microchip.com,
	vivien.didelot@gmail.com, f.fainelli@gmail.com,
	davem@davemloft.net, kuba@kernel.org, netdev@vger.kernel.org,
	linux-kernel@vger.kernel.org
Subject: Re: [PATCH 2/2] net: dsa: tag_ksz: dont let the hardware process the layer 4 checksum
Date: Thu, 15 Jul 2021 16:12:51 +0300	[thread overview]
Message-ID: <20210715131251.zhtcsjkat267yrtl@skbuf> (raw)
In-Reply-To: <trinity-0dbbc59b-1e7d-4f58-8611-adb281a82477-1626354270982@3c-app-gmx-bap31>

On Thu, Jul 15, 2021 at 03:04:31PM +0200, Lino Sanfilippo wrote:
> Please note that skb_put() asserts that the SKB is linearized. So I think we
> should rather clear both NETIF_F_FRAGLIST and NETIF_F_SG unconditionally since also
> header taggers use some form of skb_put() dont they?

The tail taggers use skb_put() as part of the routine to make room for
the tail tag.

Some of the header taggers use __skb_put_padto() when the packets are
too small (under ETH_ZLEN). When they are so small they are definitely
linear already.

We don't have a third form/use of skb_put().

  reply	other threads:[~2021-07-15 13:12 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-14 19:17 [PATCH 0/2] Fixes for KSZ DSA switch Lino Sanfilippo
2021-07-14 19:17 ` [PATCH 1/2] net: dsa: tag_ksz: linearize SKB before adding DSA tag Lino Sanfilippo
2021-07-14 19:17 ` [PATCH 2/2] net: dsa: tag_ksz: dont let the hardware process the layer 4 checksum Lino Sanfilippo
2021-07-14 19:48   ` Vladimir Oltean
2021-07-14 20:15     ` Andrew Lunn
2021-07-15  6:54       ` Vladimir Oltean
2021-07-15 11:16         ` Aw: " Lino Sanfilippo
2021-07-15 11:49           ` Vladimir Oltean
2021-07-15 13:04             ` Aw: " Lino Sanfilippo
2021-07-15 13:12               ` Vladimir Oltean [this message]
2021-07-15 13:34                 ` Lino Sanfilippo
2021-07-15 13:08         ` Andrew Lunn
2021-07-15 14:36           ` Vladimir Oltean
2021-07-15 15:50             ` Andrew Lunn
2021-07-19  8:20             ` Aw: " Lino Sanfilippo
2021-07-19  8:24               ` Vladimir Oltean
2021-07-15 16:24           ` Florian Fainelli
2021-07-15 23:23 ` [PATCH 0/2] Fixes for KSZ DSA switch Florian Fainelli
2021-07-16  8:49   ` Aw: " Lino Sanfilippo

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