X-Git-Url: http://git.openwrt.org/?p=openwrt%2Fopenwrt.git;a=blobdiff_plain;f=target%2Flinux%2Fipq806x%2Fpatches-4.4%2F715-spi-qup-don-t-re-read-opflags-to-see-if-transaction-.patch;fp=target%2Flinux%2Fipq806x%2Fpatches-4.4%2F715-spi-qup-don-t-re-read-opflags-to-see-if-transaction-.patch;h=54711a1d051bddbb0363c5df82f4f529ad994649;hp=0000000000000000000000000000000000000000;hb=d7e4b9babb6ce8bf66c4c2e721b78c30d09afdda;hpb=5e563262f12d919f5062b5e47d60d0be64d33d35

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
index 0000000000..54711a1d05
--- /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
+