openwrtv4/target/linux/ipq806x/patches-4.9/0004-spi-qup-Fix-transaction-done-signaling.patch
John Crispin 1adf51702e ipq806x: clean up patches, port missing patches from 4.4
Signed-off-by: John Crispin <john@phrozen.org>
Signed-off-by: Felix Fietkau <nbd@nbd.name>
2017-03-13 13:40:55 +01:00

29 lines
1.1 KiB
Diff

From fbdf80d138f8c7fda8e598287109fb90446d557d Mon Sep 17 00:00:00 2001
From: Andy Gross <andy.gross@linaro.org>
Date: Fri, 29 Jan 2016 22:06:50 -0600
Subject: [PATCH 04/69] 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.
CC: Grant Grundler <grundler@chromium.org>
CC: Sarthak Kukreti <skukreti@codeaurora.org>
Signed-off-by: Andy Gross <andy.gross@linaro.org>
---
drivers/spi/spi-qup.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- a/drivers/spi/spi-qup.c
+++ b/drivers/spi/spi-qup.c
@@ -445,7 +445,8 @@ static irqreturn_t spi_qup_qup_irq(int i
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;