can: c_can: exit c_can_do_tx() early if no frames have been sent

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The c_can_poll() handles RX/TX events unconditionally. It may therefore
happen that c_can_do_tx() is called unnecessarily because the interrupt
was triggered by the reception of a frame. In these cases, we avoid to
execute unnecessary statements and exit immediately.

Link: https://lore.kernel.org/r/20210807130800.5246-3-dariobin@libero.it
Signed-off-by: Dario Binacchi <dariobin@libero.it>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

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Dario Binacchi 2021-08-07 15:07:58 +02:00 • committed by Marc Kleine-Budde

parent 5064e40596

commit a54cdbba9d

1 changed files with 6 additions and 5 deletions

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drivers/net/can/c_can/c_can_main.c

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