target/linux/ipq806x/patches-4.4/711-spi-qup-Fix-transaction-done-signaling.patch

   1 From 8e830bd17e945e74964a5b61353d74e34c0791cd Mon Sep 17 00:00:00 2001
   2 From: Andy Gross <andy.gross@linaro.org>
   3 Date: Fri, 29 Jan 2016 22:06:50 -0600
   4 Subject: [PATCH] spi: qup: Fix transaction done signaling
   5
   6 Wait to signal done until we get all of the interrupts we are expecting
   7 to get for a transaction.  If we don't wait for the input done flag, we
   8 can be inbetween transactions when the done flag comes in and this can
   9 mess up the next transaction.
  10
  11 Change-Id: I08d78376e71590663158d6434a3fb7c0623264c9
  12 CC: Grant Grundler <grundler@chromium.org>
  13 CC: Sarthak Kukreti <skukreti@codeaurora.org>
  14 Signed-off-by: Andy Gross <andy.gross@linaro.org>
  15 ---
  16  drivers/spi/spi-qup.c | 3 ++-
  17  1 file changed, 2 insertions(+), 1 deletion(-)
  18
  19 diff --git a/drivers/spi/spi-qup.c b/drivers/spi/spi-qup.c
  20 index 714fd4e..fe629f2 100644
  21 --- a/drivers/spi/spi-qup.c
  22 +++ b/drivers/spi/spi-qup.c
  23 @@ -447,7 +447,8 @@ static irqreturn_t spi_qup_qup_irq(int irq, void *dev_id)
  24         controller->xfer = xfer;
  25         spin_unlock_irqrestore(&controller->lock, flags);
  26
  27 -       if (controller->rx_bytes == xfer->len || error)
  28 +       if ((controller->rx_bytes == xfer->len &&
  29 +               (opflags & QUP_OP_MAX_INPUT_DONE_FLAG)) ||  error)
  30                 complete(&controller->done);
  31
  32         return IRQ_HANDLED;
  33 --
  34 2.7.2
  35