linux-kernel - [PATCH v2 0/2] Fixes for KSZ DSA switch

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Date:   Wed, 21 Jul 2021 23:56:40 +0200
From:   Lino Sanfilippo <LinoSanfilippo@....de>
To:     woojung.huh@...rochip.com, olteanv@...il.com
Cc:     UNGLinuxDriver@...rochip.com, andrew@...n.ch,
        vivien.didelot@...il.com, f.fainelli@...il.com,
        davem@...emloft.net, kuba@...nel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Lino Sanfilippo <LinoSanfilippo@....de>
Subject: [PATCH v2 0/2] Fixes for KSZ DSA switch

These patches fix issues I encountered while using a KSZ9897 as a DSA
switch with a broadcom GENET network device as the DSA master device.

PATCH 1 fixes an invalid access to an SKB in case it is scattered.
PATCH 2 fixes incorrect hardware checksum calculation caused by the DSA
tag.

Changes in v2:
- instead of linearizing the SKBs only for KSZ switches ensure linearized
  SKBs for all tail taggers by clearing the feature flags NETIF_F_HW_SG and
  NETIF_F_FRAGLIST (suggested by Vladimir Oltean)

The patches have been tested with a KSZ9897 and apply against net-next.

Lino Sanfilippo (2):
  net: dsa: ensure linearized SKBs in case of tail taggers
  net: dsa: tag_ksz: dont let the hardware process the layer 4 checksum

 net/dsa/slave.c   | 14 +++++++++-----
 net/dsa/tag_ksz.c |  9 +++++++++
 2 files changed, 18 insertions(+), 5 deletions(-)


base-commit: 54cb43199e14c1181ddcd4a3782f1f7eb56bdab8
-- 
2.32.0