spi: qup: Ensure done detection

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This patch fixes an issue where a SPI transaction has completed, but the
done condition is missed.  This occurs because at the time of interrupt the
MAX_INPUT_DONE_FLAG is not asserted.  However, in the process of reading
blocks of data from the FIFO, the last portion of data comes in.

The opflags read at the beginning of the irq handler no longer matches the
current opflag state.  To get around this condition, the block read
function should update the opflags so that done detection is correct after
the return.

Signed-off-by: Andy Gross <agross@codeaurora.org>
Signed-off-by: Abhishek Sahu <absahu@codeaurora.org>
Signed-off-by: Varadarajan Narayanan <varada@codeaurora.org>
Signed-off-by: Mark Brown <broonie@kernel.org>

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Varadarajan Narayanan 2017-07-28 12:23:00 +05:30 • committed by Mark Brown

parent 5884e17ef3

commit cd595b99af

1 changed files with 7 additions and 5 deletions

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drivers/spi/spi-qup.c

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