arm64: dts: qcom: sc7280: Mark PCIe controller as cache coherent

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@vger.kernel.org
Fixes: 92e0ee9f83b3 ("arm64: dts: qcom: sc7280: Add PCIe and PHY related node")
Signed-off-by: Krishna chaitanya chundru <quic_krichai@quicinc.com>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/1677584952-17496-1-git-send-email-quic_krichai@quicinc.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/arch/arm64/boot/dts/qcom/sc7280.dtsi b/arch/arm64/boot/dts/qcom/sc7280.dtsi
index 516e70bf04ce96fe9a6abd26a7d90ae3c677e0d1..346da6af51ac9123626fbc5f4b1a725541da5854 100644 (file)
--- a/arch/arm64/boot/dts/qcom/sc7280.dtsi
+++ b/arch/arm64/boot/dts/qcom/sc7280.dtsi
@@ -2077,6 +2077,8 @@
                        pinctrl-names = "default";
                        pinctrl-0 = <&pcie1_clkreq_n>;
 
+                       dma-coherent;
+
                        iommus = <&apps_smmu 0x1c80 0x1>;
 
                        iommu-map = <0x0 &apps_smmu 0x1c80 0x1>,