spi: Add cond_resched() in main message processing loop

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When a controller has only PIO support it is very likely that we will
run into use cases where we spend a very large amount of time consuming
CPU.  Code that does this should call cond_resched() every once in a
while to give other tasks more of a chance to run so do that in the main
SPI loop, the overhead is negligable if it's not needed.

Suggested-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Mark Brown <broonie@kernel.org>

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Mark Brown 2016-02-15 18:28:02 +00:00

parent 556351f14e

commit 628269704f

1 changed files with 3 additions and 0 deletions

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drivers/spi/spi.c

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