This is a note to let you know that I've just added the patch titled
arm64: dts: qcom: sc7280: Mark PCIe controller as cache coherent
to the 6.2-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
arm64-dts-qcom-sc7280-mark-pcie-controller-as-cache-coherent.patch
and it can be found in the queue-6.2 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 8a63441e83724fee1ef3fd37b237d40d90780766 Mon Sep 17 00:00:00 2001
From: Krishna chaitanya chundru <quic_krichai@xxxxxxxxxxx>
Date: Tue, 28 Feb 2023 17:19:12 +0530
Subject: arm64: dts: qcom: sc7280: Mark PCIe controller as cache coherent
From: Krishna chaitanya chundru <quic_krichai@xxxxxxxxxxx>
commit 8a63441e83724fee1ef3fd37b237d40d90780766 upstream.
If the controller is not marked as cache coherent, then kernel will
try to ensure coherency during dma-ops and that may cause data corruption.
So, mark the PCIe node as dma-coherent as the devices on PCIe bus are
cache coherent.
Cc: stable@xxxxxxxxxxxxxxx
Fixes: 92e0ee9f83b3 ("arm64: dts: qcom: sc7280: Add PCIe and PHY related node")
Signed-off-by: Krishna chaitanya chundru <quic_krichai@xxxxxxxxxxx>
Signed-off-by: Bjorn Andersson <andersson@xxxxxxxxxx>
Link: https://lore.kernel.org/r/1677584952-17496-1-git-send-email-quic_krichai@xxxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/arm64/boot/dts/qcom/sc7280.dtsi | 2 ++
1 file changed, 2 insertions(+)
--- a/arch/arm64/boot/dts/qcom/sc7280.dtsi
+++ b/arch/arm64/boot/dts/qcom/sc7280.dtsi
@@ -2122,6 +2122,8 @@
pinctrl-names = "default";
pinctrl-0 = <&pcie1_clkreq_n>;
+ dma-coherent;
+
iommus = <&apps_smmu 0x1c80 0x1>;
iommu-map = <0x0 &apps_smmu 0x1c80 0x1>,
Patches currently in stable-queue which might be from quic_krichai@xxxxxxxxxxx are
queue-6.2/arm64-dts-qcom-sc7280-mark-pcie-controller-as-cache-coherent.patch
