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can: mcp251xfd: mcp251xfd_tx_obj_from_skb(): don't copy data for RTR CAN frames in...
authorMarc Kleine-Budde <mkl@pengutronix.de>
Mon, 21 Dec 2020 20:34:50 +0000 (21:34 +0100)
committerMarc Kleine-Budde <mkl@pengutronix.de>
Wed, 27 Jan 2021 09:01:47 +0000 (10:01 +0100)
commita68eda203676d7504dbf02f50366d81928ab45bf
tree6281c16abc181600f51c03ab15e58e8d78c48e31tree | snapshot
parente20b85c7eb2e91d9db166ac8b08eec61c0164e9bcommit | diff
can: mcp251xfd: mcp251xfd_tx_obj_from_skb(): don't copy data for RTR CAN frames in TX-path

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>
drivers/net/can/spi/mcp251xfd/mcp251xfd-core.c diff | blob | history
Domain: System / Kernel;