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Date:   Thu, 22 Jul 2021 18:30:52 +0200
From:   Greg Kroah-Hartman <>
Cc:     Greg Kroah-Hartman <>,,
        Alexandru Elisei <>,
        Robin Murphy <>,
        Punit Agrawal <>,
        Heiko Stuebner <>,
        Sasha Levin <>
Subject: [PATCH 5.13 077/156] arm64: dts: rockchip: Update RK3399 PCI host bridge window to 32-bit address memory

From: Punit Agrawal <>

[ Upstream commit 8efe01b4386ab38a36b99cfdc1dc02c38a8898c3 ]

The PCIe host bridge on RK3399 advertises a single 64-bit memory
address range even though it lies entirely below 4GB.

Previously the OF PCI range parser treated 64-bit ranges more
leniently (i.e., as 32-bit), but since commit 9d57e61bf723 ("of/pci:
Add IORESOURCE_MEM_64 to resource flags for 64-bit memory addresses")
the code takes a stricter view and treats the ranges as advertised in
the device tree (i.e, as 64-bit).

The change in behaviour causes failure when allocating bus addresses
to devices connected behind a PCI-to-PCI bridge that require
non-prefetchable memory ranges. The allocation failure was observed
for certain Samsung NVMe drives connected to RockPro64 boards.

Update the host bridge window attributes to treat it as 32-bit address
memory. This fixes the allocation failure observed since commit

Reported-by: Alexandru Elisei <>
Suggested-by: Robin Murphy <>
Signed-off-by: Punit Agrawal <>
Tested-by: Alexandru Elisei <>
Signed-off-by: Heiko Stuebner <>
Signed-off-by: Sasha Levin <>
 arch/arm64/boot/dts/rockchip/rk3399.dtsi | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm64/boot/dts/rockchip/rk3399.dtsi b/arch/arm64/boot/dts/rockchip/rk3399.dtsi
index 1703817c7354..7f8081f9e30e 100644
--- a/arch/arm64/boot/dts/rockchip/rk3399.dtsi
+++ b/arch/arm64/boot/dts/rockchip/rk3399.dtsi
@@ -227,7 +227,7 @@
 		       <&pcie_phy 2>, <&pcie_phy 3>;
 		phy-names = "pcie-phy-0", "pcie-phy-1",
 			    "pcie-phy-2", "pcie-phy-3";
-		ranges = <0x83000000 0x0 0xfa000000 0x0 0xfa000000 0x0 0x1e00000>,
+		ranges = <0x82000000 0x0 0xfa000000 0x0 0xfa000000 0x0 0x1e00000>,
 			 <0x81000000 0x0 0xfbe00000 0x0 0xfbe00000 0x0 0x100000>;
 		resets = <&cru SRST_PCIE_CORE>, <&cru SRST_PCIE_MGMT>,

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