ipq806x: sync with latest patches sent by QCA

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

diff --git a/target/linux/ipq806x/patches-4.4/715-spi-qup-don-t-re-read-opflags-to-see-if-transaction-.patch b/target/linux/ipq806x/patches-4.4/715-spi-qup-don-t-re-read-opflags-to-see-if-transaction-.patch
new file mode 100644 (file)
index 0000000..54711a1
--- /dev/null
+++ b/target/linux/ipq806x/patches-4.4/715-spi-qup-don-t-re-read-opflags-to-see-if-transaction-.patch
@@ -0,0 +1,32 @@
+From f57ff801665b868d8607c9e872466b54982564bc Mon Sep 17 00:00:00 2001
+From: Matthew McClintock <mmcclint@codeaurora.org>
+Date: Thu, 10 Mar 2016 16:48:27 -0600
+Subject: [PATCH] spi: qup: don't re-read opflags to see if transaction is done
+ for reads
+
+For reads, we will get another interrupt so we need to handle things
+then. For writes, we can finish up now.
+
+Change-Id: I4fa95ae7bb9d78f8ba54c613b981b37d4ea81d7e
+Signed-off-by: Matthew McClintock <mmcclint@codeaurora.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 45e30c7..59bc37c 100644
+--- a/drivers/spi/spi-qup.c
++++ b/drivers/spi/spi-qup.c
+@@ -569,7 +569,8 @@ static irqreturn_t spi_qup_qup_irq(int irq, void *dev_id)
+       }
+
+       /* re-read opflags as flags may have changed due to actions above */
+-      opflags = readl_relaxed(controller->base + QUP_OPERATIONAL);
++      if (opflags & QUP_OP_OUT_SERVICE_FLAG)
++              opflags = readl_relaxed(controller->base + QUP_OPERATIONAL);
+
+       if ((controller->rx_bytes == xfer->len &&
+               (opflags & QUP_OP_MAX_INPUT_DONE_FLAG)) ||  error)
+--
+2.7.2
+