can: mcp251xfd: mcp251xfd_tx_obj_from_skb(): clean up padding of CAN-FD frames

Browse source

CAN-FD frames have only specific frame length (0, 1, 2, 3, 4, 5, 6, 7, 8, 12,
16, 20, 24, 32, 48, 64). A CAN-FD frame provided by user space might not cover
the whole CAN-FD frame. To avoid sending garbage over the CAN bus the driver
pads the CAN frame with 0x0 (if MCP251XFD_SANITIZE_CAN is activated).

This patch cleans up the pad len calculation. Rounding to full u32 brings no
benefit, in case of CRC transfers, the hw_tx_obj->data is not aligned to u32
anyway.

Link: https://lore.kernel.org/r/20210114153448.1506901-3-mkl@pengutronix.de
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

...

This commit is contained in:

Marc Kleine-Budde 2020-12-21 21:48:20 +01:00

parent 9845b8f530

commit 561aa5b4ce

1 changed files with 7 additions and 6 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

13

drivers/net/can/spi/mcp251xfd/mcp251xfd-core.c

View file