aboutsummaryrefslogtreecommitdiffstats
path: root/target/linux/ipq806x/patches-4.4/711-spi-qup-Fix-transaction-done-signaling.patch
diff options
context:
space:
mode:
Diffstat (limited to 'target/linux/ipq806x/patches-4.4/711-spi-qup-Fix-transaction-done-signaling.patch')
-rw-r--r--target/linux/ipq806x/patches-4.4/711-spi-qup-Fix-transaction-done-signaling.patch35
1 files changed, 35 insertions, 0 deletions
diff --git a/target/linux/ipq806x/patches-4.4/711-spi-qup-Fix-transaction-done-signaling.patch b/target/linux/ipq806x/patches-4.4/711-spi-qup-Fix-transaction-done-signaling.patch
new file mode 100644
index 0000000000..dd4bad344b
--- /dev/null
+++ b/target/linux/ipq806x/patches-4.4/711-spi-qup-Fix-transaction-done-signaling.patch
@@ -0,0 +1,35 @@
+From 8e830bd17e945e74964a5b61353d74e34c0791cd 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] 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.
+
+Change-Id: I08d78376e71590663158d6434a3fb7c0623264c9
+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(-)
+
+diff --git a/drivers/spi/spi-qup.c b/drivers/spi/spi-qup.c
+index 714fd4e..fe629f2 100644
+--- a/drivers/spi/spi-qup.c
++++ b/drivers/spi/spi-qup.c
+@@ -447,7 +447,8 @@ 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;
+--
+2.7.2
+