net: mctp: usb: Use packet-length max for maximum packet-size check

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The max packet size is smaller than the max transfer size, as we only
have a u8 length field in the transport header.

Add a define for the maximum representable length, and use that for our
check. Use this for the MTU maximum calculation too.

Signed-off-by: Jeremy Kerr <jk@codeconstruct.com.au>
Link: https://patch.msgid.link/20260724-dev-mctp-usb-1-1-v5-2-e66bbba0dbdc@codeconstruct.com.au
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

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Jeremy Kerr 2026-07-24 13:15:23 +08:00 • committed by Jakub Kicinski

parent 2f2e974f8f

commit 05b1a3a5ee

2 changed files with 3 additions and 2 deletions

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2

drivers/net/mctp/mctp-usb.c

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3

include/linux/usb/mctp-usb.h

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