can: mcp251xfd: mcp251xfd_tx_obj_from_skb(): don't copy data for RTR CAN frames in TX-path

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In Classical CAN there are RTR frames. RTR frames have the RTR bit set, may
have a dlc != 0, but contain no data.

This patch optimizes the TX-path to not copy any data for RTR frames.

Link: https://lore.kernel.org/r/20210114153448.1506901-5-mkl@pengutronix.de
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

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This commit is contained in:

Marc Kleine-Budde 2020-12-21 21:34:50 +01:00

parent e20b85c7eb

commit a68eda2036

1 changed files with 11 additions and 5 deletions

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16

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

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