[PATCH 16/22] arm64: dts: qcom: monaco-monza-som: Fix the PCIe iommu-map entries

From: Manivannan Sadhasivam via B4 Relay

Date: Thu Jul 30 2026 - 08:09:44 EST


From: Manivannan Sadhasivam <manivannan.sadhasivam@xxxxxxxxxxxxxxxx>

The IOMMU provider pcie_smmu uses '#iommu-cells = <2>', but the PCIe
iommu-map entries specify only one cell for the SID, omitting the SID
mask. This went unnoticed until the OF core started warning with commit
ccb2fd725d41 ("of: Respect #{iommu,msi}-cells in maps"):

iommu-map has 1-cell entries targeting 2-cell #iommu-cells, treating as 1-cell output

So fix the entries to match the provider's '#iommu-cells' property.

Fixes: 5238f4e7169f ("arm64: dts: qcom: Add Monaco Monza SoM")
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@xxxxxxxxxxxxxxxx>
---
arch/arm64/boot/dts/qcom/monaco-monza-som.dtsi | 16 ++++++++--------
1 file changed, 8 insertions(+), 8 deletions(-)

diff --git a/arch/arm64/boot/dts/qcom/monaco-monza-som.dtsi b/arch/arm64/boot/dts/qcom/monaco-monza-som.dtsi
index 9b5ed55939b8..36af1ad2105d 100644
--- a/arch/arm64/boot/dts/qcom/monaco-monza-som.dtsi
+++ b/arch/arm64/boot/dts/qcom/monaco-monza-som.dtsi
@@ -196,14 +196,14 @@ &iris {

/* PCIe0 Gen4 x2 */
&pcie0 {
- iommu-map = <0x0 &pcie_smmu 0x0000 0x1>,
- <0x100 &pcie_smmu 0x0001 0x1>,
- <0x200 &pcie_smmu 0x0007 0x1>,
- <0x208 &pcie_smmu 0x0002 0x1>,
- <0x210 &pcie_smmu 0x0003 0x1>,
- <0x218 &pcie_smmu 0x0004 0x1>,
- <0x300 &pcie_smmu 0x0005 0x1>,
- <0x400 &pcie_smmu 0x0006 0x1>;
+ iommu-map = <0x0 &pcie_smmu 0x0000 0x0 0x1>,
+ <0x100 &pcie_smmu 0x0001 0x0 0x1>,
+ <0x200 &pcie_smmu 0x0007 0x0 0x1>,
+ <0x208 &pcie_smmu 0x0002 0x0 0x1>,
+ <0x210 &pcie_smmu 0x0003 0x0 0x1>,
+ <0x218 &pcie_smmu 0x0004 0x0 0x1>,
+ <0x300 &pcie_smmu 0x0005 0x0 0x1>,
+ <0x400 &pcie_smmu 0x0006 0x0 0x1>;

status = "okay";
};

--
2.43.0