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can: isotp: Explain PDU in CAN_ISOTP help text

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The help text for the CAN_ISOTP config symbol uses the acronym "PDU".  However,
this acronym is not explained here, nor in Documentation/networking/can.rst.

Expand the acronym to make it easier for users to decide if they need to enable
the CAN_ISOTP option or not.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/20201013141341.28487-1-geert+renesas@glider.be
Acked-by: Oliver Hartkopp <socketcan@hartkopp.net>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
This commit is contained in:
Geert Uytterhoeven
2020-10-13 16:13:41 +02:00
committed by Marc Kleine-Budde
parent 08c487d8d8
commit 5a7de2408f
1 changed files with 3 additions and 2 deletions
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net/can/Kconfig
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@@ -62,8 +62,9 @@ config CAN_ISOTP
communication between CAN nodes via two defined CAN Identifiers. communication between CAN nodes via two defined CAN Identifiers.
As CAN frames can only transport a small amount of data bytes As CAN frames can only transport a small amount of data bytes
(max. 8 bytes for 'classic' CAN and max. 64 bytes for CAN FD) this (max. 8 bytes for 'classic' CAN and max. 64 bytes for CAN FD) this
segmentation is needed to transport longer PDUs as needed e.g. for segmentation is needed to transport longer Protocol Data Units (PDU)
vehicle diagnosis (UDS, ISO 14229) or IP-over-CAN traffic. as needed e.g. for vehicle diagnosis (UDS, ISO 14229) or IP-over-CAN
traffic.
This protocol driver implements data transfers according to This protocol driver implements data transfers according to
ISO 15765-2:2016 for 'classic' CAN and CAN FD frame types. ISO 15765-2:2016 for 'classic' CAN and CAN FD frame types.
If you want to perform automotive vehicle diagnostic services (UDS), If you want to perform automotive vehicle diagnostic services (UDS),