From: Niklas Cassel <niklas.cassel@linaro.org>
Date: Thu, 24 Jan 2019 13:00:47 +0000 (+0100)
Subject: ARM: dts: qcom: ipq4019: Fix MSI IRQ type
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=97131f85c08e024df49480ed499aae8fb754067f;p=linux.git

ARM: dts: qcom: ipq4019: Fix MSI IRQ type

The databook clearly states that the MSI IRQ (msi_ctrl_int) is a level
triggered interrupt.

The msi_ctrl_int will be high for as long as any MSI status bit is set,
thus the IRQ type should be set to IRQ_TYPE_LEVEL_HIGH, causing the
IRQ handler to keep getting called, as long as any MSI status bit is set.

A git grep shows that ipq4019 is the only SoC using snps,dw-pcie that has
configured this IRQ incorrectly.

Not having the correct IRQ type defined will cause us to lose interrupts,
which in turn causes timeouts in the PCIe endpoint drivers.

Signed-off-by: Niklas Cassel <niklas.cassel@linaro.org>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Andy Gross <andy.gross@linaro.org>
---

diff --git a/arch/arm/boot/dts/qcom-ipq4019.dtsi b/arch/arm/boot/dts/qcom-ipq4019.dtsi
index 19635f91e2c46..48b3cb474ba0f 100644
--- a/arch/arm/boot/dts/qcom-ipq4019.dtsi
+++ b/arch/arm/boot/dts/qcom-ipq4019.dtsi
@@ -398,7 +398,7 @@
 			ranges = <0x81000000 0 0x40200000 0x40200000 0 0x00100000
 				  0x82000000 0 0x40300000 0x40300000 0 0x400000>;
 
-			interrupts = <GIC_SPI 141 IRQ_TYPE_EDGE_RISING>;
+			interrupts = <GIC_SPI 141 IRQ_TYPE_LEVEL_HIGH>;
 			interrupt-names = "msi";
 			#interrupt-cells = <1>;
 			interrupt-map-mask = <0 0 0 0x7>;