From: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com>
Date: Mon, 1 Dec 2014 03:46:40 +0000 (-0600)
Subject: arm64: amd-seattle: Fix PCI bus range due to SMMU limitation
X-Git-Tag: v3.19-rc1~164^2
X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=70bcc9ba15690f1e616fd5f60831f4602dd39670;p=linux.git

arm64: amd-seattle: Fix PCI bus range due to SMMU limitation

Since PCIe is using SMMUv1 which only supports 15-bit stream ID,
only 7-bit PCI bus id is used to specify stream ID. Therefore,
we only limit the PCI bus range to 0x7f.

Signed-off-by: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---

diff --git a/arch/arm64/boot/dts/amd/amd-seattle-soc.dtsi b/arch/arm64/boot/dts/amd/amd-seattle-soc.dtsi
index 0c8e7ae96fed..2874d92881fd 100644
--- a/arch/arm64/boot/dts/amd/amd-seattle-soc.dtsi
+++ b/arch/arm64/boot/dts/amd/amd-seattle-soc.dtsi
@@ -147,7 +147,7 @@ pcie0: pcie@f0000000 {
 			#size-cells = <2>;
 			#interrupt-cells = <1>;
 			device_type = "pci";
-			bus-range = <0 0xff>;
+			bus-range = <0 0x7f>;
 			msi-parent = <&v2m0>;
 			reg = <0 0xf0000000 0 0x10000000>;