Horatiu Vultur a3eeaea04e net: phy: mscc: Stop clearing the the UDPv4 checksum for L2 frames ...

[ Upstream commit 57a92d1465 ]

We have noticed that when PHY timestamping is enabled, L2 frames seems
to be modified by changing two 2 bytes with a value of 0. The place were
these 2 bytes seems to be random(or I couldn't find a pattern).  In most
of the cases the userspace can ignore these frames but if for example
those 2 bytes are in the correction field there is nothing to do.  This
seems to happen when configuring the HW for IPv4 even that the flow is
not enabled.
These 2 bytes correspond to the UDPv4 checksum and once we don't enable
clearing the checksum when using L2 frames then the frame doesn't seem
to be changed anymore.

Fixes: 7d272e63e0 ("net: phy: mscc: timestamping and PHC support")
Signed-off-by: Horatiu Vultur <horatiu.vultur@microchip.com>
Link: https://patch.msgid.link/20250523082716.2935895-1-horatiu.vultur@microchip.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

2025-06-19 15:31:56 +02:00

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Makefile

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mscc_fc_buffer.h

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mscc_mac.h

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mscc_macsec.c

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mscc_macsec.h

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mscc_main.c

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mscc_ptp.c

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mscc_ptp.h

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mscc_serdes.c

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mscc_serdes.h

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mscc.h

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