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>,
