From: Krishna chaitanya chundru quic_krichai@quicinc.com
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@qui... Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- 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 @@ -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>,