[PATCH 07/18] spi: qup: Fix transaction done signaling

Varadarajan Narayanan
2017-06-14T05:57:01Z

Wait to signal done until we get all of the interrupts we are expecting
to get for a transaction. If we don't wait for the input done flag, we
can be inbetween transactions when the done flag comes in and this can
mess up the next transaction.

Signed-off-by: Andy Gross <andy.gross@linaro.org>
Signed-off-by: Varadarajan Narayanan <varada@codeaurora.org>
---
drivers/spi/spi-qup.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/spi/spi-qup.c b/drivers/spi/spi-qup.c
index 2124815..7c22ee4 100644
--- a/drivers/spi/spi-qup.c
+++ b/drivers/spi/spi-qup.c
@@ -465,7 +465,8 @@ static irqreturn_t spi_qup_qup_irq(int irq, void *dev_id)
controller->xfer = xfer;
spin_unlock_irqrestore(&controller->lock, flags);

- if (controller->rx_bytes == xfer->len || error)
+ if ((controller->rx_bytes == xfer->len &&
+ (opflags & QUP_OP_MAX_INPUT_DONE_FLAG)) || error)
complete(&controller->done);

return IRQ_HANDLED;