target/linux/ipq806x/patches-4.9/0008-spi-qup-don-t-re-read-opflags-to-see-if-transaction-.patch

   1 From 9864f39695aefe0831b3c6e86c0dff30489ad580 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 08/69] spi: qup: don't re-read opflags to see if transaction
   5  is done 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 Signed-off-by: Matthew McClintock <mmcclint@codeaurora.org>
  11 ---
  12  drivers/spi/spi-qup.c | 3 ++-
  13  1 file changed, 2 insertions(+), 1 deletion(-)
  14
  15 diff --git a/drivers/spi/spi-qup.c b/drivers/spi/spi-qup.c
  16 index d0cbb37d53b0..5b41026285dd 100644
  17 --- a/drivers/spi/spi-qup.c
  18 +++ b/drivers/spi/spi-qup.c
  19 @@ -567,7 +567,8 @@ static irqreturn_t spi_qup_qup_irq(int irq, void *dev_id)
  20         }
  21
  22         /* re-read opflags as flags may have changed due to actions above */
  23 -       opflags = readl_relaxed(controller->base + QUP_OPERATIONAL);
  24 +       if (opflags & QUP_OP_OUT_SERVICE_FLAG)
  25 +               opflags = readl_relaxed(controller->base + QUP_OPERATIONAL);
  26
  27         if ((controller->rx_bytes == xfer->len &&
  28                 (opflags & QUP_OP_MAX_INPUT_DONE_FLAG)) ||  error)
  29 --
  30 2.11.0
  31