can: c_can: Speed up tx buffer invalidation

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It's suffcient to kill the TXIE bit in the message control register
even if the documentation of C and D CAN says that it's not allowed to
do that while MSGVAL is set. Reality tells a different story and this
change gives us another 2% of CPU back for not waiting on I/O.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Alexander Stein <alexander.stein@systec-electronic.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

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Thomas Gleixner 2014-04-11 08:13:22 +00:00 • committed by Marc Kleine-Budde

parent 35bdafb576

commit 939415973f

2 changed files with 40 additions and 15 deletions

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54

drivers/net/can/c_can/c_can.c

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1

drivers/net/can/c_can/c_can.h

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