linux/include/soc
Vladimir Oltean a8015ded89 net: mscc: ocelot: properly account for VLAN header length when setting MRU
What the driver writes into MAC_MAXLEN_CFG does not actually represent
VLAN_ETH_FRAME_LEN but instead ETH_FRAME_LEN + ETH_FCS_LEN. Yes they are
numerically equal, but the difference is important, as the switch treats
VLAN-tagged traffic specially and knows to increase the maximum accepted
frame size automatically. So it is always wrong to account for VLAN in
the MAC_MAXLEN_CFG register.

Unconditionally increase the maximum allowed frame size for
double-tagged traffic. Accounting for the additional length does not
mean that the other VLAN membership checks aren't performed, so there's
no harm done.

Also, stop abusing the MTU name for configuring the MRU. There is no
support for configuring the MRU on an interface at the moment.

Fixes: a556c76adc ("net: mscc: Add initial Ocelot switch support")
Fixes: fa914e9c4d ("net: mscc: ocelot: create a helper for changing the port MTU")
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2020-03-09 18:58:17 -07:00
..
arc ARCv2: IDU-intc: Add support for edge-triggered interrupts 2019-08-26 22:34:59 +05:30
at91 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
bcm2835 soc: bcm2835: sync firmware properties with downstream 2019-01-09 16:34:46 +01:00
brcmstb treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
fsl soc: fsl: qe: avoid IS_ERR_VALUE in ucc_fast.c 2019-12-09 13:54:37 -06:00
imx treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
mediatek iommu/mediatek: Clean up struct mtk_smi_iommu 2019-08-30 15:57:27 +02:00
mscc net: mscc: ocelot: properly account for VLAN header length when setting MRU 2020-03-09 18:58:17 -07:00
nps soc: Support for NPS HW scheduling 2016-11-30 11:54:25 -08:00
qcom soc: qcom: ocmem: add missing includes 2019-10-07 08:19:43 -07:00
rockchip treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 288 2019-06-05 17:36:37 +02:00
sa1100 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
sifive riscv: move sifive_l2_cache.h to include/soc 2020-01-12 10:12:44 -08:00
tegra memory: tegra: Introduce Tegra30 EMC driver 2019-11-11 14:55:27 +01:00