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

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Date:   Wed, 14 Jun 2017 11:22:20 +0530
From:   Varadarajan Narayanan <varada@...eaurora.org>
To:     broonie@...nel.org, robh+dt@...nel.org, mark.rutland@....com,
        andy.gross@...aro.org, david.brown@...aro.org,
        linux-spi@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        linux-soc@...r.kernel.org
Cc:     Varadarajan Narayanan <varada@...eaurora.org>
Subject: [PATCH 07/18] spi: qup: Fix transaction done signaling

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@...aro.org>
Signed-off-by: Varadarajan Narayanan <varada@...eaurora.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;
-- 
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