target/linux/ipq806x/patches-4.9/0004-spi-qup-Fix-transaction-done-signaling.patch

   1 From fbdf80d138f8c7fda8e598287109fb90446d557d 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 04/69] 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 CC: Grant Grundler <grundler@chromium.org>
  12 CC: Sarthak Kukreti <skukreti@codeaurora.org>
  13 Signed-off-by: Andy Gross <andy.gross@linaro.org>
  14 ---
  15  drivers/spi/spi-qup.c | 3 ++-
  16  1 file changed, 2 insertions(+), 1 deletion(-)
  17
  18 --- a/drivers/spi/spi-qup.c
  19 +++ b/drivers/spi/spi-qup.c
  20 @@ -445,7 +445,8 @@ static irqreturn_t spi_qup_qup_irq(int i
  21         controller->xfer = xfer;
  22         spin_unlock_irqrestore(&controller->lock, flags);
  23
  24 -       if (controller->rx_bytes == xfer->len || error)
  25 +       if ((controller->rx_bytes == xfer->len &&
  26 +               (opflags & QUP_OP_MAX_INPUT_DONE_FLAG)) ||  error)
  27                 complete(&controller->done);
  28
  29         return IRQ_HANDLED;