target/linux/ipq806x/patches-4.4/715-spi-qup-don-t-re-read-opflags-to-see-if-transaction-.patch

   1 From f57ff801665b868d8607c9e872466b54982564bc Mon Sep 17 00:00:00 2001
   2 From: Matthew McClintock <mmcclint@codeaurora.org>
   3 Date: Thu, 10 Mar 2016 16:48:27 -0600
   4 Subject: [PATCH] spi: qup: don't re-read opflags to see if transaction is done
   5  for reads
   6
   7 For reads, we will get another interrupt so we need to handle things
   8 then. For writes, we can finish up now.
   9
  10 Change-Id: I4fa95ae7bb9d78f8ba54c613b981b37d4ea81d7e
  11 Signed-off-by: Matthew McClintock <mmcclint@codeaurora.org>
  12 ---
  13  drivers/spi/spi-qup.c | 3 ++-
  14  1 file changed, 2 insertions(+), 1 deletion(-)
  15
  16 diff --git a/drivers/spi/spi-qup.c b/drivers/spi/spi-qup.c
  17 index 45e30c7..59bc37c 100644
  18 --- a/drivers/spi/spi-qup.c
  19 +++ b/drivers/spi/spi-qup.c
  20 @@ -569,7 +569,8 @@ static irqreturn_t spi_qup_qup_irq(int irq, void *dev_id)
  21         }
  22
  23         /* re-read opflags as flags may have changed due to actions above */
  24 -       opflags = readl_relaxed(controller->base + QUP_OPERATIONAL);
  25 +       if (opflags & QUP_OP_OUT_SERVICE_FLAG)
  26 +               opflags = readl_relaxed(controller->base + QUP_OPERATIONAL);
  27
  28         if ((controller->rx_bytes == xfer->len &&
  29                 (opflags & QUP_OP_MAX_INPUT_DONE_FLAG)) ||  error)
  30 --
  31 2.7.2
  32